Die Schwalbe

5331 problem(s) found in 1625 milliseconds (displaying 100 problem(s)). [COMMENTDATE>=20191019]

1 - P0000007
Andrej N. Kornilow
Andriy Frolkin
Dmitri W. Pronkin

5408 Die Schwalbe 97 02/1986
3. Preis
P0000007
(15+15)
BP in 33,0
1. Sc3 Sc6 2. Se4 Se5 3. c3 c6 4. Da4 Da5 5. b3 b6 6. La3 La6 7. Lc5 Lc4 8. Le3 Le6 9. Lh6 Lh3 10. gxh3 gxh6 11. h4 h5 12. Lh3 Lh6 13. Lf5 Lf4 14. Sh3 Sh6 15. Tg1 Tg8 16. Tg3 Tg6 17. Te3 Te6 18. f3 f6 19. Kf2 Kf7 20. Tg1 Tg8 21. Tg4 Tg5 22. Sg3 Sg6 23. Lb1 Lb8 24. Td4 Td5 25. Tdd3 Tdd6 26. Df4 Df5 27. Te4 Te5 28. Ke3 Ke6 29. Sf2 Sf7 30. Sg4 Sg5 31. Sh6 Sh3 32. Sg8 Sg1 33. Dh6 Dh3
play all play one stop play next play all
Henrik Juel: After a couple of hours Natch 3.1 had not even found the symmetrical solution (2018-12-07)
paul: This problem obtained 3rd Prize in the informal tourney, see Die Schwalbe 249/2011 (judge M. Caillaud) (2020-01-06)
comment
Keywords: Unique Proof Game, Symmetrical position
Genre: Retro
FEN: 1b4N1/p2pp2p/1pprkpnQ/4r2p/4R2P/1PPRKPNq/P2PP2P/1B4n1
Reprints: 581 Ukrainisches Album 1986-1990
111 Shortest Proof Games 11/1991
Input: Gerd Wilts, 1995-06-03
Last update: Gerd Wilts, 2020-05-21 more...
2 - P0000040
Wolfgang Dittmann
(VI) Schachkalender 1986
P0000040
(16+14)
BP in 10,5
Schlagschach
1. e4 Sc6 2. Ke2 Sa5 3. Kf3 Sf6 4. e5 Sh5 5. Kg4 d5 6. Kxh5 e6 7. Kg4 b6 8. Kf3 Sb7 9. Ke2 b5 10. Ke1 Sd6 11. exd6
play all play one stop play next play all
paul: This problem obtained 4th HM in the informal tourney, see Die Schwalbe 249/2011 (judge M. Caillaud) (2020-01-06)
more ...
comment
Keywords: Unique Proof Game, En passant, Promenade, Losing Chess
Genre: Retro, Fairies
Computer test: paul: C+ (Popeye 4.55) (2010-3-12)
FEN: r1bqkb1r/p1p2ppp/3Pp3/1p1p4/8/8/PPPP1PPP/RNBQKBNR
Reprints: 5532 Die Schwalbe 99 06/1986
62 Der Blick zurück 2006
(B1) Quartz 35 08/2010
Input: Gerd Wilts, 1995-06-03
Last update: Erich Bartel, 2013-08-17 more...
3 - P0000046
Wolfgang Dittmann
5589 Die Schwalbe 100 08/1986
P0000046
(13+13)
Auf welchem Feld wurde der schwarze Springer geschlagen?
Schlagschach
1. Sc3 Sc6 2. Se4 Se5 3. Sg3 Sg6 4. Sf3 Sf6 5. Sd4 h6 6. b3 Th7 7. Lb2 ... 8. Lc3 ... 9. Db1 ... 10. Kd1 ... 11. Kc1 ... 12. Kb2 ... 13. Ka3 ... 14. Kb4 ... 15. Kb5 Sd5 16. Se6 Sxc3 17. Sxf8 Sxb5 18. Sxh7 ... 19. Se4 ... 20. g3 ... 21. Lg2 ... 22. Lf3 Sd4 23. Shg5 Sxf3 24. Sxf3 Sf8 25. Dd1 Sh7 26. Sc3 Sf6 27. Sb1 Sg8 28. Sg1
play all play one stop play next play all
Der sS wurde auf f3 geschlagen.
paul: This problem obtained 5th HM in the informal tourney, see Die Schwalbe 249/2011 (judge M. Caillaud) (2020-01-06)
comment
Keywords: Losing Chess, Where was piece x captured? (s), Non-Unique Proof Game
Genre: Fairies, Retro
FEN: r1bqk1n1/ppppppp1/7p/8/8/1P4P1/P1PPPP1P/RN1Q2NR
Reprints: 64 Der Blick zurück 2006
(B3) Quartz 35 08/2010
Input: Gerd Wilts, 1995-06-03
Last update: Alfred Pfeiffer, 2014-06-03 more...
4 - P0000049
Wolfgang Dittmann
Klaus Wenda

5648v Die Schwalbe 101 10/1986
P0000049
(12+9)
#1 vor 3
VRZ, Typ Proca
Madrasi
1. Te4-a4? d4-d3 (nicht 1. ... 0-0-0? wegen 2. a4-a5/Lb8-a7!) und nun Zugzwang für Weiß. 2. b4-b5? oder f4-f5? verhindert schließlich den Vorwärts-ep-Schlag, da der Doppelschritt nicht mehr nachweisbar ist. 2. a4-a5!? gestattet die Verteidigung 2. ... Kb8-c8! (wonach 3. a5xLb6 erzwungen). 2. b4xLa5?? macht überraschend die Rücknahme 3. Kc7-d6 illegal wegen Retropatt (d7-d nicht mehr erlaubt, weil auch der wTf8 noch einen sEntschlagstein benötigt!). 2. f4xLe5? Lf6xSe5! und 2. f4xSe5? Sd7-e5 (2. f4xDe5? illegal). Lösung: 1. Tc4-a4! (droht z.B. nach 1. ... d4-d3 das Kurzmatt 2. b4xSc5 vor 1. Tc5#) 1. ... 0-0-0 2. Te4-c4 bel. 3. Kc7-d6 und vor 1. exd6ep# (1. Th6-h4? 0-0-0! 1. Tg,g,f-h4? e4xL,Sd3!, 2. ... 0-0-0)
play all play one stop play next play all
paul: This problem obtained 4th Comm in the informal tourney, see Die Schwalbe 249/2011 (judge M. Caillaud) (2020-01-06)
comment
Keywords: En passant in the retro play, Madrasi, Castling in the retro play, Defensive Retractor, Type Proca
Genre: Retro, Fairies
FEN: 2kr1Rrb/Bp3pPp/1P1K4/PPPpPP2/7R/3p4/4P3/8
Reprints: W174 Dreiklang 2001
163 Der Blick zurück 2006
5648vv Die Schwalbe 217 02/2006
Input: Gerd Wilts, 1995-06-03
Last update: A.Buchanan, 2012-07-08 more...
5 - P0000051
Andriy Frolkin
(U) Die Schwalbe 102 12/1986
P0000051
(15+13)
Vor mindestens 38 Einzelzügen mußte ep geschlagen werden!
R: 1. Sh3-g5+ a5-a4 2. Tb8-e8 a6-a5 3. Le8-f7 a7-a6 4. Lf7-g8 Lg8-h7 5. b7-b8=T Lh7-g8 6. b6-b7 Lg8-h7 7. b5-b6 Lh7-g8 8. b4-b5 Lg8-h7 9. b2-b4 Lh7-g8 10. Tb3-d3 Lg8-h7 11. Tb8-b3 Lh7-g8 12. b7-b8=T Lg8-h7 13. b6-b7 Lh7-g8 14. b5-b6 Lg8-h7 15. a4xBb5 Lh7-g8 16. Tg8-g7 b6-b5 17. Tf8-g8 Lg8-h7 18. a3-a4 h7-h6 19. a2-a3 Kh6-h5 20. h5xg6ep+ g7-g5 21. Sg5-h3+
play all play one stop play next play all
paul: This problem obtained a Special Prize in the informal tourney, see Die Schwalbe 249/2011 (judge M. Caillaud) (2020-01-06)
comment
Keywords: En passant, En passant in the retro play, Non-standard material, Promotion (TTL)
Genre: Retro
FEN: 4R1B1/3p1BRb/4P1Pp/3PRKNk/p2prB2/3RpqP1/4PprQ/6bn
Input: Gerd Wilts, 1995-06-03
Last update: Nikolai Beluhov, 2011-05-06 more...
6 - P0000052
Andriy Frolkin
(V) Die Schwalbe 102 12/1986
P0000052
(16+11)
Vor mindestens 72 Einzelzügen mußte ep geschlagen werden!
5 weiße Schlagfälle durch Bauern: axb, c3xd4, exf, f5xe6 & hxg; zwei Umwandlungen auf b8 und eine auf g8. Eine schwarze Umwandlung auf c1. Die weißen Figuren, die zur Entwandlung zurückschreiten können, sind die schwarzfeldrigen Lh8 und g5 sowie der retrofreie Sg1. Aber vor jeder Entwandlung muß Weiß das Feld h2 räumen, um dem Sg4 das Pendeln zu ermöglichen und so ein schwarzes Retropatt zu verhindern.
Retro: 1. Sg2-h4+ Sh4-g6+ 2. h7-h6 Se2-g1 3. a3-a2 Tg1-f1 4. a4-a3 Sf1-h2 5. Sh2-g4 Lh6-g5 6. Sg4-h2 Lg7-h6 7. Sh2-g4 Lf8-g7! 8. Sg4-h2 Ld6-f8 9. ~ Lb8-c6 10. ~ Sc3-e2 11. ~ Sb5-c3 12. ~ Sd6-b5 13. ~ Sf7-d6 14. ~ b7-b8=L 15. ~ b6-b7 16. ~ b5-b6 17. ~ b4-b5 18. ~ b3-b4 19. ~ Lg7-h8 20. ~ Lf8-g7 21. ~ Ld6-f8 22. ~ Lb8-d6 23. ~ b7-b8=L 24. ~ b6-b7 25. ~ b5-b6 26. ~ b4-b5 27. Sh2-g4 a3xb4
Nach diesem Entschlag des schwarzen Bb führt die dritte Entwandlung auf g8 zu einem erzwungenen En-passant-Schlag. 28. Sg4-h2 Sg5-f7 29. Kh6-h5 Th2-h3 30. Kh5-h6 Sh3-g5 31. b5-b4 Sg6-h4 32. b6-b5 Se7-g6 33. b7-b6 Sg8-e7! 34. a5-a4 g7-g8=S 35. a6-a5 g6-g7 36. Kh6-h5 h5xg6ep+ 37. g7-g5 Sg5-h3+ 38. a7-a6 Th3-h2 39. Sh2-g4 Dh4-f4 40. Sf4-g2+ g2-g3 41. Tg3-f3
Diese Zugfolge mit möglichen Zugumstellungen kann nicht verkürzt werden. Mindestens 71 Einzelzüge sind nach dem En-passant-Schlag geschehen. Rekord für eines der Themen des 173. Thematurniers der "Schwalbe".
play all play one stop play next play all
paul: This problem obtained first Prize in the informal tourney, see Die Schwalbe 249/2011 (judge M. Caillaud) (2020-01-06)
comment
Keywords: En passant, En passant in the retro play, Non-standard material, Promotion
Genre: Retro
FEN: 7B/8/4PPNp/4pKBk/3PrQnn/3pBrPR/p2P1p1N/4bRNB
Reprints: 568 Ukrainisches Album 1986-1990
H21 FIDE Album 1986-1988 1995
Input: Gerd Wilts, 1995-06-03
Last update: Nikolai Beluhov, 2011-05-06 more...
7 - P0000053
Frank Christiaans
5704v Die Schwalbe 102 12/1986
P0000053
(14+9)
#3
b) Lf1 nach e2
a) 1. T8xa7+ Kxc6 2. Td1 (0-0-0?) Txa7,Txf2,Txd7 3. d8=S,Tc7,Se5#
b) 1. T8xa7+ Kxc6 2. 0-0-0!
play all play one stop play next play all
klären: Forderung b) falsch. a+b unlösbar. Ist wLg1 gemeint? Auch dann unlösbar.(VF)
Anton Baumann: im Diagramm fehlt wLf1 !
aus Lösungsbesprechung: a) Versucht man die O-O-O zu erhalten, dann waren die letzten Züge: 1. … Ka6-b7 2.axb6ep+ b7-b5 3.c4-c5+ Kb5-a6 4.d3xc4+. Weiss muss jetzt noch viermal schlagen; unter den Schlagobjekten war der umgewandelte sBf, der sich nur auf e1 oder f1 - mit Rochadezerstörung - umwandeln konnte.
b) retro: 1. … Ka6-b7 2.axb6ep+ b7-b5 3.Ld1-e2+ Kb5-a6. Lösung: 1.T8xa7+ Kc6 2.O-O-O (2.Td1? Dxg1+) (2020-04-03)
Henrik Juel: wLf1 must be added in diagrem
The forward play in both twins is damaged by the triple threat 3.Se5,d8=S,Txa7 and the resulting mate duals
The main content is the analysis in part a showing that White may not castle (2020-04-03)
Henrik Juel: diagram, not diagrem, of course (2020-04-03)
comment
Keywords: Cant Castler, En passant, Castling (wl), Promotion in forward play
Genre: Retro
FEN: R1b5/pkrPp1p1/1PN5/2P5/6PP/5Nrp/1P4Pq/R3K1BQ
Input: Gerd Wilts, 1995-06-03
Last update: Rainer Staudte, 2019-08-11 more...
8 - P0000074
Leonid M. Borodatow
5887v Die Schwalbe 105 06/1987
P0000074
(14+12)
Löse die Stellung auf!
R: 1. Dh6xSh5 Tg2-g4 2. Lg4-f5 Tf4-f6 3. Lf5-g4 Sf1-h2 4. Lg4-f5 Sg3-f1 5. Lf5-g4 Th2-g2 6. Lg4-f5 Tf7-f4 7. Tf4-e4 Se4-g3 8. Tf5-f4 Sf4-h5 9. Lh5-g4 Sd5-f4 10. Tf6-f5
play all play one stop play next play all
Henrik Juel: I do not see how the stipulation can be fulfilled, but the retroplay is neat: -1.Qh6:S Rg2 -2.Bg4 Rf4 -3.Bf5 Sf1 -4.Bg4 fSg3 -5.Bf5 Rh2 -6.Bg4 Rf7 -7.Rf4 Se4 -8.Rf5 Sf4 -9.Bh5 Sd5 -10.Rf6 etc. bSd5 unpromotes on c1, later c3xd4 is retracted. (2003-08-18)
gw: The correct stipulation of this version is 'Release the position'. (2003-09-12)
Hans-Jürgen Manthey: mogliche Rückfuhrung:
R: 1. Dh6xh5+ Tg2-g4 2. Lg4-f5+ Tf4-f6 3. Lf5-g4 Sf1-h2 4. Lg4-f5 Sg3-f1 5. Lf5-g4 Th2-g2 6. Lg4-f5 Tf7-f4 7. Tf4-e4 Se4-g3+ 8. Tf5-f4 Sf4-h5 9. Lh5-g4+ Sd5-f4 10. Tf6-f5 Sb4-d5 11. Tf5-f6 Sa2-b4 12. Tf6-f5 Sc1-a2 13. Tf5-f6 c2-c1=S 14. Tf6-f5 c3-c2 15. Tf5-f6 c4-c3 16. c3xTd4 Td8-d4 17. Tf6-f5 Da7-e3 18. Tf5-f6 Sc5-e4 19. Ke4-e5 Sa6-c5+ 20. Tf6-f5 c5-c4 21. Tf5-f6 d4-d3 22. Kd3-e4 d5-d4 23. Tf6-f5 c7-c5 24. Tf5-f6 Tb8-d8 25. Tf6-f5 Tb1-b8 26. Tf5-f6 Sb8-a6 27. Tf6-f5 Lf4-g5 28. Tf5-f6 Le5-f4 29. De3-h6 Tf6-f7 30. Lg4-h5 Sf7-h8 31. Tf4-f5 sd6-f7 32. Ta4-f4 Tf4-f6 33. Th8-g8 Kg5-h4 34. Lg8-h7 h4-h3 35. Lh3-g4 b2-b1=T 36. Lf1-h3 b3-b2 37. Kc2-d3 b4-b3+ 38. g2xLf3 h5-h4 39. Lf7-g8 h7-h5 40. h6xDg7 Dg8-g7 41. Lg7-f8 Dd8-g8 42. Le8-f7 b5-b4 43. Tf8-h8 Tc4-f4 44. Dd3-e3+ Th3-h2 45. Tf4-f8 Tg3-h3 46. Th4-f4 Tg4-g3 47. Kd1-c2 Tf4-g4 48. Db1-d3 Tf8-f4 49. Th1-h4 Sf5-d6 50. Lc6-e8 d7-d5 51. La8-c6 Lb7-f3 52. Ta1-a4 Da2-a7 53. Ke1-d1 Lc8-b7 54. Dd1-b1 Db1-a2 55. c2-c3 b7-b5 56. h5-h6 Kf6-g5 57. Lh6-g7+ Kf7-f6 58. h4-h5 Ke8-f7 59. h2-h4 Lg7-e5 60. Lg5-h6 Th8-f8 61. Lf6-g5 Sh6-f5 62. a7-a8=L Sg8-h6 63. a6-a7 Lf8-g7 64. a5-a6 g7-g6 65. a4-a5 f7xSe6 66. a2-a4 b2-b1=D 67. Sg5-e6 b3-b2 68. Se4-g5 Ta4-c4 69. Sc3-e4 Ta8-a4 70. Sb1-c3 b4-b3 71. Lb2-f6 a5xb4 72. Lc1-b2 a7-a5 73. b2-b4 (2020-03-26)
comment
Keywords: Non-standard material, Promotion (l), Whose move?
Genre: Retro
FEN: 5BRn/4p1PB/4prp1/4KBbQ/3PR1rk/3pqP1p/3PPP1n/6N1
Input: Gerd Wilts, 1995-06-03
Last update: Gerd Wilts, 2004-10-25 more...
9 - P0000075
Andriy Frolkin
Leonid Lyubashevsky

5888 Die Schwalbe 105 06/1987
2. Preis
P0000075
(16+11)
Löse die Stellung auf!
R: 1. Sd2xDf3 Dd5-f3 2. Sf3xSd2 Db3-d5 3. Ta3-a2 a7-a6 4. La2-b1 Sb1-d2 5. Sd2-f3+ De6-b3 6. Lb3-a2+ ... 7. Ta2-a3 ... 8. Ld5-b3 ... 9. b3xSa4 Sc5-a4 10. Ta4-a2 Sa6-c5 11. Ka2-a1 Sa3-b1 12. Tb1-b2 Sc4-a3 13. Ka1-a2 Se5-c4 14. Ta2-a4 ... 15. Tb2-a2 ... 16. Ka2-a1 ... 17. Ka3-a2 ... 18. Ka4-a3 ... 19. Ta2-b2 .. 20. Ta3-a2 Kb2-c3
play all play one stop play next play all
Henrik Juel: Solution: -1.Sd2:Q Qd5 -2.Sf3:S Qb3 -3.Ra3 a7 -4.Ba2 Sb1 -5.Sd2 Qe6 -6.Bb3 .. -7.Ra2 .. -8.Bd5 .. -9.b3:S Sc5 -10.Ra4 Sa6 -11.Ka2 Sa3 -12.Rb1 Sc4 -13.Ka1 Se5 -14.Ra2 .. -15.aRb2 .. -16.Ka2 .. -17.Ka3 .. -18.Ka4 .. -19.Ra2 .. -20.Ra3 Kb2 etc. Very nice puzzle. (2003-06-19)
Hans-Jürgen Manthey: mögliche Rückführung:
R: 1. Sd2xDf3 Dd5-f3 2. Sf3xSd2 Db3-d5 3. Ta3-a2 a7-a6 4. La2-b1 Sb1-d2+ 5. Sd2-f3+ De6-b3 6. Lb3-a2+ Df6-e6 7. Ta2-a3 De6-f6 8. Ld5-b3 Df6-e6 9. b3xSa4 Sc5-a4 10. Ta4-a2 Sa6-c5 11. Ka2-a1 Sa3-b1 12. Tb1-b2 Sc4-a3 13. Ka1-a2 Se5-c4 14. Ta2-a4 De6-f6 15. Tb2-a2 Df6-e6 16. Ka2-a1 De6-f6 17. Ka3-a2 Df6-e6 18. Ka4-a3 De6-f6 19. Ta2-b2 Df6-e6 20. Ta3-a2 Kb2-c3 21.Ta1-b1+ De6-f6 22. Le4-d5 Df6-e6 23. Sf3-d2 Td2-e2 24. Lh7-e4 Kc3-b2 25. Sd4-f3 Lf3-e1 26. Le2-f1 Lb7-f3 27. Dh1-e1 Td1-d2 28. Dh5-h1 Th1-d1 29. Sf3-d4 Th4-h1 30. Sd4-f3 Th1-c1 31. Sf3-d4 Th3-h1 32. Th1-a1 Dg7-f6 33. Ta1-a3 Tg4-h4 34. Sg1-f3 Dh8-g7 35. Lf1-e2 Tg8-g4 36. Dd1-h5 Kd4-c3 37. e2-e3+ Tg3-h3 38. Ka3-a4 Tb8-g8 39. Kb2-a3 Dd8-h8 40. Kc1-b2 Tg8-g3 41. Kd2-c1 Lc8-b7 42. Ke1-d2 b7-b6 43. Sb6-a8 Sg4-e5 44. Sc4-b6 Ke5-d4 45. Sd2-c4+ Kf6-e5 46. b2-b3 Kg7-f6 47. a3xLb4 Kf8-g7 48. a2-a3 Lc3-b4 49. Sb1-d2 Lg7-c3+ 50. Ld2-a5 Ke8-f8 51. Lc1-d2 Lf8-g7 52. d2-d3 Th8-g8 53. Lg8-h7 h7-h6 54. g7-g8=L Ta8-b8 55. h6xg7 Sb8-a6 56. h5-h6 Sf6-g4 57. h4-h5 Sg8-f6 58. h2-h4 (2020-03-27)
Henrik Juel: The pawn play hxPg-g8=L is obvious, but the fact that wPa4,b4 have cross-captured is not
wSf3 uncaptures sD and sS, which screen on b3 and b1 (2020-03-27)
comment
Keywords: Uncapture of pieces by pieces, Non-standard material, Promotion (L)
Genre: Retro
FEN: N7/2pppp2/pp5p/B7/PP6/2kPPN2/RRP1rPP1/KBrbQB2
Reprints: 563 Ukrainisches Album 1986-1990
Input: Gerd Wilts, 1995-06-03
Last update: Gerd Wilts, 2004-10-25 more...
10 - P0000285
Unto Heinonen
7941v Die Schwalbe 138 12/1992
2. Preis
P0000285
(13+14) C+
BP in 19,5
1. Sa3 Sf6 2. Sc4 Se4 3. Sa5 Sxd2 4. Kxd2 f5 5. Kc3 f4 6. Kb4 f3 7. Lf4 fxg2 8. Ld6 cxd6 9. Lxg2 Dc7 10. Ld5 Dc6 11. Sf3 Da6 12. Tg1 Dd3 13. Tg6 Df5 14. Th6 Dg6 15. Dg1 Dd3 16. Td1 Da6 17. Td3 Dc6 18. Ta3 Dc7 19. c3 Dd8 20. Dg6+
play all play one stop play next play all
"11 sDD-Züge - fantastisch" (TC) "Weltrekord" (BG) "nicht allzu schwer, aber raffiniert ausgeklügelt" (AG) "Schwierigkeit ist ja kein Wertkriterium und umso reizvoller ist dann das Suchen nach den (echt weiblichen!) verschlungenen Wegen, auf denen die D sich ihren Zeitgewinn erschleicht" (HHS) "eine respektable Leistung" (MS) 3,5/III/9L.
paul: bQ circuit. (2020-01-13)
comment
Keywords: Unique Proof Game, Loss of tempo (d11)
Genre: Retro
Computer test: Natch 2.2 Copyright (C) 1997,98,99,2001,2002,2003 Pascal Wassong
FEN: rnbqkb1r/pp1pp1pp/3p2QR/N2B4/1K6/R1P2N2/PP2PP1P/8
Reprints: Pat a Mat 19 04/1994
3385 U.S. Problem Bulletin 102/103 07-10/1995
feenschach 137 08-09/2000
H27 FIDE Album 1992-1994 2001
Input: Gerd Wilts, 1995-06-03
Last update: Gerd Wilts, 2005-06-28 more...
11 - P0000286
Unto Heinonen
7942v Die Schwalbe 138 12/1992
3. Preis
P0000286
(13+14)
BP in 24,5
1. d4 Sc6 2. d5 Sd4 3. h4 Sxe2 4. Th3 Sc3 5. La6 h5 6. Td3 Th6 7. Le3 Tb6 8. Sd2 Tb3 9. cxb3 Sa4 10. bxa4 bxa6 11. Db3 Lb7 12. 0-0-0 Lc6 13. Db8 Lb5 14. b4 Lc4 15. Kb2 Lb3 16. Tc1 Ld1 17. Tc4 Lc2 18. Tg4 hxg4 19. h5 Lb3 20. h6 Lc4 21. h7 Lb5 22. h8=S Lc6 23. Sg6 Lb7 24. Sf4 Lc8 25. Se2
play all play one stop play next play all
"nochmal fantastisch" (TC) "Weltrekord" (BG) "hier sind es sogar 13 Züge, die der sL benötigt um eine Tempo zu verlieren, wobei das weiße Spiel mit äußerster Präzision angelegt sein muß, um Zugumstellungen zu vermeiden" (MS) "wenn die Bändigung der D auch schwerer zu bewerkstelligen ist und entsprechend mehr Respekt verdient, so hat diese L-Darstellung doch mehr Finessen, eine interessanteres Spiel beider Parteien mit mehr Alternativen. Und dann gefällt mir 'optisch' die Db8, die sekundenlang suggeriert, sie könne den sS geschlagen haben und die zur Unzeit dorthin ziehen muß und alle Hoffnung auf Tempoverlustmanöver von sD und sT zunichte macht" (HHS) "Zwei Superstücke mit 11 D- bzw. 13 L-Tempozügen!" (CP) "Wäre es nicht redaktionell klüger gewesen, die beiden Stück nicht nebeneinander zu stellen?" (HHS) Die Überlegung brauchte ich aufgrund meiner mageren Retrovorräte nicht anzustellen ... 4/III-IV/8=L.
paul: bB circuit. (2020-01-13)
comment
Keywords: Unique Proof Game, Non-standard material, Castling, Loss of tempo (l13), Promotion (S)
Genre: Retro
FEN: rQbqkbn1/p1ppppp1/p7/3P4/PP4p1/3RB3/PK1NNPP1/6N1
Reprints: Pat a Mat 19 04/1994
3386 U.S. Problem Bulletin 102/103 07-10/1995
feenschach 137 08-09/2000
H30 FIDE Album 1992-1994 2001
Input: Gerd Wilts, 1995-06-03
Last update: Gerd Wilts, 2005-12-27 more...
12 - P0000301
Frank Christiaans
8066 Die Schwalbe 140 04/1993
P0000301
(12+3)
Problem ohne Worte
1. Kb2#
play all play one stop play next play all
Henrik Juel: Black has the move, because a retroplay like
-1... Kb2xTb1? -2.Tc1 Tb1 -3.f2?? prevents the black king from exiting
-1... b2xLSa1=T? -2.f2?? is even worse
Black to move has one possibility only, 1... Kb2#
The position is legal, e.g.,
-1.b2xPa3 b4xDa3 -2.Da4 a3 -3.Da5 Ta2 -4.Da4 Ka1 -5.Kc1 b5 -6.Ld1 etc.
allowing sK to exit via d2 and e3 later (2020-01-17)
comment
Keywords: Next move? (K-#), Non-standard material, Type A, Ending move?
Genre: Retro
FEN: 8/8/8/8/8/PPPP1P2/p1PRB1P1/rk1KNB2
Input: Gerd Wilts, 1995-06-03
Last update: A.Buchanan, 2020-01-17 more...
13 - P0000391
Nikita M. Plaksin
Alexandr I. Zolotarev

8550 Die Schwalbe 147 06/1994
P0000391
(14+13)
Löse die Stellung auf!
Henrik Juel: -1.Bg8 h5 -2.B=g7 h6 -3.f6:Q h7 -4.f5 Qa1 -5.f4 Qb1 -6.b4 Q=b2 -7.b3 c3:S -8.Sa4 c4 -9.Sb6:P c5 -10.Sd7 c6 -11.Sf6 c7 -12.Sg8 a5 -13.S=g7 a6 -14.h6:Q Qa1 -15.h5 Qb1 -16.h4 Ka1 -17.a2 a7 -18.Qa3 etc. Good activity on b1 and g8. (2003-12-10)
Hans-Jürgen Manthey: eine mögliche Rückführung mit dem schwer lesbaren Anfang von Henrik Juel:
1. Lg8-h7 h5-h4 2. g7-g8=L h6-h5 3. f6xDg7 h7-h6 4. f5-f6 Da1-g7 5. f4-f5 Db1-a1 6. b4-b5 b2-b1=D 7. b3-b4 c3xSb2 8. Sa4-b2 c4-c3 9. Sb6xa4 c5-c4 10. Sd7-b6 c6-c5 11. Sf6-d7 c7-c6 12. Sg8-f6 a5-a4 13. g7-g8=S a6-a5 14. h6xDg7 Da1-g7 15. h5-h6 Db1-a1 16. h4-h5 Ka1-a2 17. a2-a3 a7-a6 18. Da3-c1 Dc1-b1 19. Dd6-a3 Kb2-a1 20. Da6-d6 Db1-c1 21. Tc1-d1 Kc3-b2 22. Td1-c1 Db2-b1 23. Tb1-d1 Da3-b2 24. Ta1-b1 Dc5-a3 25. Tb1-a1 Kb4-c3 26. Ta1-b1 Td1-d2 27. d2-d3 Td3-e3 28. Tb1-a1 Td8-d3 29. Ta1-b1 e3-e2 20. Tb1-a1 d4xLe3 31. Ta1-b1 d5-d4 32. Ld4-e3 Db6-c5 33. Lb2-d4 Sd3-e1 34. Lc1-b2 Se5-d3 35. Tb1-a1 Te1-d1 36. Df1-a6 Te3-e1 37. Dd1-f1 Tc3-e3 38. b2-b3 Tg8-d8 39. Ta1-b1 Kc5-b4 40. Tb1-a1 Kd6-c5 41. Ta1-b1 Kd7-d6 42. Tb1-a1 Ke8-d7 43. Ta1-b1 Tc6-c3 44. Se2-g1 Td6-c6 45. Sc3-e2 Td8-d6 46. e2-e4 Ta8-d8 47. Tb1-a1 Dd6-b6 48. Ta1-b1 Lg1-h2 49. Tb1-a1 Le5-g1 50. Ta1-b1 Sc6-e5 51. Sb1-c3 Lg7-e5 52. Kg1-h1 Se3-g2 53. Lf1-h3 Sf5-e3 54. Th3-g3 Sh6-f5 55. g2-g4 Lg4-f3 56. Th1-h3 Lc8-g4 57. h2-h4 Lf8-g7 58. Kf2-g1 g7-g6 59. Sg6-h8 Th8-g8 60. Sh4-g6 Sg8-h6 61. Sf3-h4 Sb8-c6 62. Sg1-f3 Dd8-d6 63. Ke1-f2 d7-d5 64. f2-f4 (2020-03-28)
Henrik Juel: Yes Hans-Jürgen, I know that my old retroplays may be difficult to read, because they use english names for the men and my own very abbreviated notation
Now I use german names (except for pawns, because B can be both Bauer and Bishop); and my abbreviated notation now only applies to plain movements, not captures or promotions (2020-03-28)
comment

Genre: Retro
FEN: 7N/1p2pp1B/6p1/1P6/4P1Pp/P2PrbRB/k1Prp1nb/2QRn1NK
Input: Gerd Wilts, 1995-06-03
Last update: Nikolai Beluhov, 2010-07-23 more...
14 - P0000401
Andriy Frolkin
Anatolii Vasylenko

4296 Die Schwalbe 80 04/1983
P0000401
(9+12)
h#3* (AP)
1. ... dxc6ep 2. 0-0 h5 3. Kf7 Sxd6#
1. 0-0 Se5 2. Kh8 Lc2 3. Tg8 Sf7#
play all play one stop play next play all
Henrik Juel: If Black may castle, White captured fxPg and g7xBf8=B. 1.dxc6ep 00! 2.h5 Kf7 3.Sxd6#; 0... 00 1.Se5 Kh8 2.Bc2 Rg8 3.Sf7#. (2003-11-07)
Hans-Jürgen Manthey: Rochade ist noch möglich, Rückfuhrungen nach den Mattstellungen:
R: 1. Se5-f7# Tf8-g8 2. Lb3-c2 Kg8-h8 3. Sc4-e5 o-o 4. Kb5-b4 c7-c5+ 5. Se3-c4 Da6-a7 6. Sf5-e3 Df1-a6 oder
1. Sc4xd6# Kg8-f7 2. h4-h5 o-o 3. d5xc6ep c7-c5 4. Kb4-b5 Da6-a7 5. Se3-c4 Dd3-a6 6. Sf5-e3 Df1-d3
und weiter...
7. Sh6-f5 Da6-f1 8. Sg8xh6 Df1-a6 9. g7-g8=S Da6-f1 10. g6-g7 Df1-a6 11. Lg7-c3 Da6-f1 12. Lf8-g7 Df1-a6 13. g5-g6 Da6-f1 14. e4xLd5 a7xSb6 15. Sa4-b6 Df1-a6 16. Sc3-a4 Da6-f1 17. Sb1-c3 Df1-a6 18. Lc4-b3 Dc1-f1 19. Kc3-b4 Dh1xLc1+ 20. Lf1-c4 b3xTa2 21. Kd3-c3 Le6-d5 22. Ta1-a2 Sb6-c8 23. a2-a3 Lc8-e6 24. Ke2-d3 c4xDb3 25. Dd1-b3 d5xc4 Ke1-e2 e6xTd5 26. c2-c4 f7xSe6 27. Sf4-e6 Dh3-h1 28. Td3-d5 Dd7-h3 29. Th3-d3 Dd8-d7 30. Th1-h3 Sd5-b6 31. Se2-f4 Sf6-d5 32. Sg1-e2 Sg8-f6 33. e2-e4 d7-d6 34. h2-h4 Sb6-a8 35. g4-g5 Ta8-b8 36. g2-g4 Sd5-b6 37. g7xLf8=L Sb4-d5 38. f6xg7 Sa6-b4 39. f5-f6 Sb8-a6 40. f4-f5 h7-h6 41. f2-f4 (2020-03-29)
Henrik Juel: Here is a detailed analysis
Black captured [Lc1] with an officer, a7xb6, and f7xe6xd5xPc4xb3xb2
To enable black castling White captured exLd, fxPg, g7xLc8=L, and [Ph7] with an officer, and also promoted on g8
With White to move, last move was c7-c5, provided Black never moved Ke8 and Th8, so he must justify the en passant capture a posteriori by castling
1... dxc6 2.Kf7 h5 3.Tf8 Sxd6 is not a solution in 2.5 moves
CH+ by Popeye 4.61 and Henrik's analysis... (2020-03-29)
comment
Keywords: a posteriori (AP), En passant, Castling (sk)
Genre: h#, Retro
FEN: nrn1k2r/qp2p3/1p1p4/1KpP4/2N4P/PBB5/pP1P4/8
Input: Gerd Wilts, 1995-06-03
Last update: Gerd Wilts, 2005-10-08 more...
15 - P0000530
Leonid M. Borodatow
3328 Die Schwalbe 66 12/1980
P0000530
(13+9)
Löse die Stellung auf!
Henrik Juel: -1.Bd1:Q Qd2 -2.Bc2-b1 Qg5 -3.Rg8 Rh8 -4.R=h7:Q Qc5 -5.g6:Q etc. The 3 uncaptured bQ's unpromote on c1, a wB unpromotes on g8. (2003-08-18)
Hans-Jürgen Manthey: mögliche Rückführung:
R: 1.Ld1xDc2+ Dd2-c2 2. Lc2-b1+ Dg5-d2 3. Sf4-h3 Lh3-f1 4. Kf3-e4 Sg3-h1 5. Dh1-d1 Lc8-h3 6. Dh4-h1 Dc5-g5 7. Se6-f4 Sf5-g3 8. Db4-h4 Kd2-c1 9. Lb1-c2 Ke1-d2 10. Da5-b4 Kf1-e1 11. Tc1-c3 Kg1-f1 12. Lc2-b1 Kh2-g1 13. Ta1-c1 Kh3-h2 14. Lb1-c2 Kh4-h3 15. Tg8-h8 Th8-h7 16.Sf4-e6 Kg5-h4 17. Kg2-f3 Kf6-g5 18. Sh3-f4 Dc1-c5 19. Sg1-h3 c2-c1=D 20. h7xDg8=T c3-c2 21. g6xDh7 c4-c3 22. Kf1-g2 Ke6-f6 23. h5xTg6 Kd7-e6 24. Dd2-h5 Ta6-g6 25. De1-d2 c5-c4 26. h4-h5 d6xLc5 27. Le3-c5 Sd4-f5 28. Lf4-e3 Df5-h7 29. Le3-f4 Dc5-f5 30. Lf4-e3 Dc1-c5 31. Le3-f4 c2-c1=D 32. Lf4-e3 c3-c2 33. Le3-f4 c4-c3 34. Lf4-e3 b5xSc4 35. Sa3-c4 Dh7-g8 36. Le3-f4 Df5-h7 37. Lf4-e3 Dc5-f5 38. Le3-f4 Dc1-c5 39. Lf4-e3 c2-c1=D 40.Lc1-f4 c3-c2 41. d2-d3 c4-c3 42. Lc2-d1 Ta8-a6 43. Lh7-c2 Sc6-d4 44. Lg8-h7 Sb8-c6 45. h7xSg8=L Ke8-d7 46. g6xDh7 b7-b5 47. g5-g6 Dg6-h7 48. Le4-b1 h7-h6 49. c2xb3 a4xTb3 50. Th3-b3 a5-a4 51. Dd1-e1 d7-d6 52. Ke1-f1 c5-c4 53. Sb1-a3 a6-a5 54. Lg2-e4 a7-a6 55. Lf1-g2 Db6-g6 56. g4-g5 c6-c5 57. g2-g4 Dd8-b6 58. Th1-h3 c7-c6 59. h2-h4 (2020-03-29)
comment

Genre: Retro
FEN: 5b1R/4pppr/7p/8/4K3/1PRP3N/PPB1PP2/1Bk1Qb1n
Input: Gerd Wilts, 1995-06-03
16 - P0000540
Bernd Schwarzkopf
3397 Die Schwalbe 67 02/1981
P0000540
(12+16)
Woher kamen die wTT a1 und h1?
R: 1. Th3-h1 a6-a5 2. Tf3-h3 Kg5-h6 3. h3-h4+
play all play one stop play next play all
Der wTa1 kommt von h1, der wTh1 von a1.
Henrik Juel: Following the initial retroplay, Th1 cannot get back behind the white pawns before Ta1 has retracted to the right, wLa7 to c1, and b2-b3 (2020-01-27)
comment
Keywords: Non-standard material, Interchange, Which are original men?
Genre: Retro
FEN: nqb1Kbqn/Brp2prb/1p4pk/p6p/P6P/1P2P3/2PP1PP1/R6R
Input: Gerd Wilts, 1995-06-03
Last update: Alfred Pfeiffer, 2020-01-27 more...
17 - P0000556
Wolfgang Dittmann
3532 Die Schwalbe 69 06/1981
Herbert Grasemann gewidmet
2. Preis
P0000556
(7+11) C+
#1 vor 3
VRZ, Typ Proca
R: 1. La1-g7 (2. Lh8xTa1) f6-f5 Le5xTa1 Ta2-a1+ 3. Le4xSf3, dann 1. Txc7#
R: 1. Lf8-g7? c4xb3ep 2. b2-b4 d5xBc4
play all play one stop play next play all
paul: If 1...Th5-g5, then 2.Lh8xTa1 Ta2 3.Bg7xS(L)h8=L and Bg8=T(D)# (2010-09-30)
TBr: General plan: 1.Txc7#, but 1... Bxf3, so basic plan: R: 1.Le4xSf3 and 1.Txc7#, but 1... fxe4.
Safeguarding play: R: 1.La1-g7! (thr. 2.Lh8xTa1 Ta2/3-a1+ 3.h7-h8=L and 1.h8=D#) 1... f6-f5
2nd foreplan: 2.Le5xTa1! (preventing Tg5-d5) Ta2/3-a1+, and now the basic plan works: 3.Le4xSf3 and 1.Txc7#.
Not immediately R: 1.Lh8-g7? (thr. 2.h7-h8=L and 1.h8=d#) due to the retro analytic defence 1... c4xb3ep! 2.b2-b4 d5xBc4 closing e4-a8!
"Dresden" theme presented in New German form (safeguarding play is pure of aims) with retro refutation in the try R: 1.Lh8-g7? (2020-05-01)
comment
Keywords: En passant in the retro play, Defensive Retractor, Type Proca
Genre: Retro
Computer test: RSP 1.0
FEN: k7/PRpp2B1/1p1Pp1P1/5pr1/p6p/1p3B2/8/5K1b
Reprints: 119 Der Blick zurück 2006
Input: Gerd Wilts, 1995-06-03
Last update: Mario Richter, 2010-10-10 more...
18 - P0000600
Nikita M. Plaksin
3944 Die Schwalbe 75 06/1982
4. ehrende Erwähnung
P0000600
(7+11)
Welches waren die letzten 3 Einzelzüge?
R: 1. f7xTe8=T f2-f1=L 2. g7xTf8=T
mögliche weitere Auflösung:
2. ... e3xTf2 3. Tf1-f2 Kc7-d8 4. f2-f3 f3xLg2 5. Th1-f1 e4xSf3 6. Sg1-f3 d4xTe3 7. Tb3-e3 Kd6-c7 8. Tb1-b3 d5xDe4 9. Dd3-e4 c6xSd5 10. Sb6-d5 Ta8-e8 11. Dd1-d3 Ta5-a8 12. Lf1-g2 Ta8-f8 13. Kh7-h6 Db8-g8 14. Tc1-b1 Ke6-d6 15. Sc8-b6 h3-h2 16. Kg8-h7 Th5-a5 17. Sb6xLc8 Dh2-b8 18. Kf8-g8 Sb3-a1 19. Ke8-f8 Sc5-b3 20. Kd8-e8 Sa6-c5 21. Sc4-b6 Sb8-a6 22. Kc7-d8 Te5-h5 23. Kb6-c7 Th5-e5 24. Kc5-b6 Th8-h5 25. Kb4-c5 h4-h3 26. Kc3-b4 c5xBd4 27. Ta1-c1 b6xLc5 28. La3-c5 a7xBb6 29. Lc1-a3 h5-h4 30. Kd2-c3 h7-h5 31. h6xLg7 Lf8-g7 32. Ke1-d2 g7-g6 33. g6xSf7 Dc7-h2 34. g5-g6 Dd8-c7 35. h5-h6 Sh6-f7 36. g4-g5 Sg8-h6 37. h4-h5 Kf7-e6 38. Sa3-c4 Ke8-f7 39. Sb1-a3 c7-c6 40. b5-b6 f7-f6 41. b4-b5 Sh6-g8 42. b2-b4 Sg8-h6 43. d2-d4 Sh6-g8 44. g2-g4 Sg8-h6 45. h2-h4
play all play one stop play next play all
Henrik Juel (PDB 2020-03-25): White must uncapture both black rooks at the start of the retroplay, to avoid something like -44... h7 -45.h6xLg7 Lf8 -46... g7 -47.g6xTf7?? with a black rook caught on f7
Henrik Juel: -1.R=f7:R B=f2 -2.R=g7:R. (2003-12-10)
Mu-Tsun Tsai: As a last 3 single moves only problem, this is a hard one! (2011-04-27)
Hans-Jürgen Manthey: mögliche Zugfolge:
1.g4 Sf6 2.d4 Sg8 3.h4 Sf6 4.Th3 Sg8 5.Tc3 Sf6 6.Le3 Sg8 7.b4 Sf6 8.b5 Sg8 9.b6 axb6 10.Tc5 bxc5 11.Sc3 cxd4 12.Sf3 dxe3 13.Dd5 c6 14.Se4 cxd5 15.Lg2 dxe4 16.OOO exf3 17.Kb2 fxg2 18.Kc3 Ta3+ 19.Kc4 Da5 20.Tf1 De1 21.f3 Kd8 22.h5 Kc7 23.g5 Kb6 24.g6 Ka7 25.Kb5 Ka8 26.Kb6 Sh6 27.Kc7 f6 28.Kxc8 Sf7 29.gxf7 g6 30.h6 Lg7+ 31.Kc7 Tc8+ 32.Kb6 Tcc3 33.hxg7 Td3 34.Kc7 Ka7 35.Kd8 Sc6+ 36.Ke8 Sd4 37.Kf8 Sb3 38.Kg8 h5 39.Kh8 Sa1 40.Kh7 Da5 41.Kh6 Dd8 42.Tf2 Dg8 43.Tf1 Kb6 44.Tf2 Kc7 45.Tf1 Ta8 46.Tf2 Tf8 47.Tf1 Ta3 48.Tf2 Taa8 49.Tf1 Tae8 50.Tf2 h4 51.Tf1 h3 52.Tf2 h2 53.Tf1 Kd8 54.Tf2 exf2 und nun 55.gxf8T f1L 56.fxe8T+ (2020-03-25)
Henrik Juel: Here are the three last single moves with clearer notation than I used in 2003
-1.f7xTe8=T f2-f1=L -2.g7xTf8=T
Then Black must uncapture some officer on f2, so White has retractions (2020-03-25)
Henrik Juel: White must uncapture both black rooks at the start of the retroplay, to avoid something like
-44... h7 -45.h6xLg7 Lf8 -46... g7 -47.g6xTf7?? with a black rook caught on f7 (2020-03-25)
more ...
comment
Keywords: Last Moves? (3)
Genre: Retro
FEN: 3kRRq1/1p1pp3/5ppK/8/8/5P2/P1P1P1pp/n4b2
Reprints: (27) Die Schwalbe 156, p. 227, 12/1995
Input: Gerd Wilts, 1995-06-03
Last update: Mario Richter, 2020-03-26 more...
19 - P0000637
Matjas Zigman
Marko Klasinc

2139 Die Schwalbe 45 06/1977
P0000637
(3+14)
Weiß nimmt 1 Zug zurück, dann #2
R: 1. Sf7xTh8, dann 1. Kxf6
play all play one stop play next play all
Henrik Juel: Black pawns have captured all 13 missing white men, including [Pa2,h2], both of which must have promoted
axTb-b8=Y has captured the single missing black man, so [Ph2] promoted on h8, and Black may not castle (2020-03-06)
comment
Keywords: Cant Castler, Help retractor, Castling (sk)
Genre: Retro
FEN: 4k2N/p7/3RKbp1/5pp1/5pp1/5pp1/6b1/5nnq
Input: Gerd Wilts, 1995-06-03
Last update: Mario Richter, 2009-12-18 more...
20 - P0000643
Carl Erik Israel Lind
2203 Die Schwalbe 46 08/1977
P0000643
(9+8) cooked
-1s, dann h#1
b) sSe5 statt sLe5
a) R: 1. f7xLg6, dann 1. f5 Lf7#
b) R: 1. f7xSg6, dann 1. f5 Sf4#
play all play one stop play next play all
Cook: NL
a) R: 1. a6xDb5, dann 1. Ke6-d5 Db5-c4#
Adrian Storisteanu: Possible fix: wPb3->b6, wPh3->h6. (2020-02-07)
more ...
comment
Keywords: Help retractor
Genre: Retro
FEN: 4K3/1p5p/2p1k1p1/1pP1b1Pp/1P5P/1P5P/1P5P/8
Input: Gerd Wilts, 1995-06-03
Last update: Alfred Pfeiffer, 2016-07-11 more...
21 - P0000888
Bruno Ebner
638 Die Schwalbe 13 02/1972
P0000888
(5+10)
#1
a) -wDc6: 1. Sc6#
b) -wSd4: 1. Td4#
c) -wTd3: 1. Sd3#
d) -wSc5: 1. Dc5#
play all play one stop play next play all
Mario Richter: Illegale Stellung (mehr schwarze Bauernschläge notwendig als weiße Steine fehlen).
Offensichtlich ein Scherzproblem, Lösung vermutlich: entferne eine weiße Figur, dann:
- wTd3: Sd3#
- wSd4: Td4#
- wSc5: Dc5#
- wDc6: Sc6# (2010-02-24)
Henrik Juel: Writing the above solution in this order
-Td3, Sc5-d3#
-Sc5, Dc6-c5#
-Dc6, Sd4-c6#
-Sd4, Td3-d4#
discloses a cyclical pattern. (2010-02-26)
A.Buchanan: I guess it would spoil the joke to ask why we're not removing a black pawn? (2019-10-22)
Alfred Pfeiffer: Die Entfernung eines beliebigen schwarzen Bauern erlaubt kein #1. (2019-10-22)
A.Buchanan: Exactly, Alfred (2019-10-22)
comment
Keywords: Illegal position, Joke, Remove pieces, Cycle
Genre: Retro
FEN: 8/2p5/2Q5/rpNK4/pk1N4/p1pR4/1p1p4/2r5
Input: Gerd Wilts, 1995-06-03
Last update: Alfred Pfeiffer, 2019-10-22 more...
22 - P0000947
Theophilus Harding Willcocks
Werner Keym

Die Schwalbe 1978
P0000947
(3+9)
Letzter Zug?
R: 1. Da8xTb8 Tb7-b8 and e.g. 2. Lb8xSc7
play all play one stop play next play all
siehe auch P0000948
more ...
comment
Keywords: Last Move? (DxT), Type A, Economy record, Type B (a fortiori)
Genre: Retro
FEN: 1qkB4/P1brp3/Kppp4/1p6/8/8/8/8
Reprints: 1.9A Eigenartige Schachprobleme , p. 174, 2010
1.9B Eigenartige Schachprobleme , p. 174, 2010
Input: Gerd Wilts, 1995-06-03
Last update: A.Buchanan, 2019-10-30 more...
23 - P0001056
Niels Høeg
Skakbladet 1923
P0001056
(2+1)
Welches war der letzte Zug?
R: 1. Bc7-c8=L+
play all play one stop play next play all
A.Buchanan: In Eigenartige Schachprobleme, this one is attributed to Branko Pavlovic, Sahovski Vjesnik, 1950. Don't know if this is typo or anticipation. (2016-07-18)
Henrik Juel: In ES this one is also included, as 1.47C
The difference is the stipulation question
Pavlovic asks: First move by bishop? (2016-07-18)
A.Buchanan: So how best to represent this in PDB? It seems silly to have a separate problem for what is at best a version of a very tiny problem. There are a few other simplistic cases where a "Last Move" problem functions as a "First Move". Best maybe to keep one entry, and indicates Pavlovic's version changed the stipulation slightly. (2016-07-18)
Henrik Juel: Fine with me
The Pavlovic question is (translated from german): First move by the bishop? (i.e., Lc8)
Answer: It never moved, ha-ha (2020-04-23)
A.Buchanan: Where someone wants to change an earlier stipulation slightly to indicate a new aspect of the same solution (especially for retro records), I suggest the nomenclature "deemed stipulation". This is not part of the problem, and does not constitute a new version, but is part of whatever judgement or republication is happening. (2020-04-24)
comment
Keywords: Type C, Last Move? (B-=L), Promotion (L), Economy record (Last move), First Move? (UWL0), Aristocrat, Move Length Record (ex-aequo), Economy record (First move)
Genre: Retro
FEN: 2B5/1K1k4/8/8/8/8/8/8
Reprints: Sahovski Vjesnik 1950
C/42 feenschach 159 04-06/2005
C3b Length Records in Last Single Moves? , p. 10, 11/2009
1.47C Eigenartige Schachprobleme , p. 190, 2010
2.65 Eigenartige Schachprobleme , p. 204, 2010
C03b Phénix 282, p. 11066, 02/2018
Input: Gerd Wilts, 1995-06-03
Last update: A.Buchanan, 2020-05-01 more...
24 - P0001134
Philip Hamilton Williams
The Chess Amateur 08/1910
P0001134
(12+11)
#2
1. Df6!
play all play one stop play next play all
Schwarz muß zuletzt entweder mit dem König oder dem Turm gezogen haben.
Henrik Juel: Black captured all missing white men with his [Pc7,g7], so last move was not a black pawn capture (2020-01-24)
comment
Keywords: Cant Castler, Castling (sk)
Genre: Retro
FEN: 2b1k2r/1N1ppp1p/1p5Q/P7/p3R1P1/4PpKp/1PPN4/5B1R
Reprints: 33 Retrograde Analysis 1915
10 Europe Echecs 12 08/1959
(1) Problem 83-86 09/1962
1498a Augsburger Allgemeine 11/11/2017
405 Scobs lignea 12/11/2017
Input: Gerd Wilts, 1995-06-03
Last update: Alfred Pfeiffer, 2020-01-24 more...
25 - P0001141
George Hume
Jamaica Gleaner 12/1891
Weihnachtsturnier 1891
1. Preis
P0001141
(9+9)
Auf welche Gedanken kommen Sie bei dieser Stellung?

Der Ld6 ist keine UWF und der sBg7 wurde auf seinem Ausgangsfeld geschlagen. Nach dem Autor muss der letzte Zug also Lf8-d6 gewesen sein, also illegale Stellung.
Datum der Originalpublikation nicht 100% sicher, laut ACM aus der "Jamaica Gleaner Christmas column".

Originalforderung: How has the position been arrived at and who is the winner, and in how many moves?

From the Jamaica Gleaner: "White mates in two moves. The last move made was by Black playing his Bishop and announcing mate. As it can be demonstrated that the Bishop is not a promoted Pawn and that Black's King's Knight's Pawn was captured on its original square by White's Queen's Knight's Pawn the Black Bishop must have been played from Bishop's square (f8) to Q3 (d6). This being an illegal move, White enforces the penalty of compelling Black to retract it and move his King whereupon White plays 1 PXB(Q) ch (1.gxf8=Q+) and mates next move by 2 Q-B4 (Qf4#). The following is a brief but pointed analysis, demonstrating the false move: White's Pawns have made six captures all on black squares. The Q Kt P (Pb2) made five of these and consequently captured the Kt P on the square upon which it now stands (g7). They could not have captured the Q B which is also lost. The White Bishop is the QRP (Pa2) promoted, the original KB having been captured on its own square as the unmoved Pawns show. To allow this promotion Black's QRP (Pa7) made two captures, the QKtP (Pb7) one, and the QBP (Pc7) two. The KRP (Ph7) has also made a capture, which accounts for the seven pieces White has lost. The Black Bishop is not a promoted Pawn, as if the Black KBP (Pf7) had played to the 7 th square (f2) and then captured a White piece on K or Kt square (e1 or g1) the captures by White Pawns cannot be accounted for without including the Black QB or KRP neither of which is available. As it can be demonstrated, then that the Black Bishop is not a promoted one, and that the KKtP was captured by the White Pawn which now stands on that square, in order to reach Q3 the Black Bishop must have an impossible move.

Der Kolumnist des ACM merkt aber zurecht an:
ACM: The above is a very fine piece of analytical work; but there is a slight flaw in connection with the minor condition, 'mate in two'. In a position of this kind we believe only that which can be proved; thus we do not think that White has any right to enact a penalty, as neither the analysis nor the conditions show that the Black Bishop came from Bishop's square on his last move; indeed, that Bishop may have played outside the Pawns on the very first move of the game which, being played, brought about the position.
A.Buchanan: I don't think this is cooked, I think it's just a very bad joke. Most time when moves are retracted it's because of self-check or illegal castling, occasional illegal en passant. But here we are meant to conclude that the Bl bishop has hopped over Bl pawn. There are problems by Hieronymus Fischer e.g. P1309484 where we are meant to conclude that a unit has escaped its game array cage somehow, but the piece is simply replaced: there is no move to be retracted and supplanted. But as long as such a problem is true to its own (joke) internal logic, it can't be described as cooked. If it fails (e.g. P1246715) it can indeed be cooked and repaired. (2019-10-22)
HBae: White plays 1 PXB(Q) ch (1.gxf8=Q+). Muß der sK nicht auf f5 stehen? (2019-10-22)
Henrik Juel: Last move (supposedly) was Lf8-d6#, which is obviously impossible and hence illegal
The penalty for this is that Black must replace Ld6 on f8 AND instead make an arbitrary move with his king
So the forward play is
0... Kf5,Kf6,Kh6 1.gxf8=D+ Kg5,Ke5 2.Df4# (2019-10-22)
comment
Keywords: Illegal position, Joke, Retract illegal move (stuck at home), Touch Move
Genre: Retro
FEN: 6B1/4p1P1/p2b2p1/p5kq/p7/4P1K1/2PPP1PP/3n4
Reprints: American Chess Monthly 1, p. 11, 03/1892
Jamaica Gleaner 30/04/1892
17 Europe Echecs 14 10/1959
Input: Gerd Wilts, 1995-06-03
Last update: Alfred Pfeiffer, 2019-10-23 more...
26 - P0001248
Marijan Dumic
(7) Problem 91-94 04/1964
1. Preis
P0001248
(13+14)
Löse die Stellung auf!
a) Weiß am Zug
b) Schwarz am Zug
R: 1. g5-g4 g2xLh3 2. Lg4-h3 e3-e4 3. Le2-g4 Sc3-b5 4. Lb5-e2 Se4-c3 5. g6-g5 Sf6-e4 6. h7-h6 Se8-f6 7. Se5-c6 Sc7-e8+
play all play one stop play next play all
: il y a 2 solutions distinctes selon que le trait est aux Blancs ou aux Noirs (2002-12-15)
AV: Trait aux Noirs :
1.e3 Cf6 2.Fc4 Cg8 3.Fe6 fxe6 4.Re2 Ch6 5.a4 g6 6.Ca3 Fg7 7.c4 Ff6 8.c5 Fe5 9.c6 d5 10.f4 Dd6 11.f5 Dc5 12.f6 Rd8 13.f7 Te8 14.Cb5 Fd7 15.cxd7 Dxc1 16.Db3 Dc3 17.Tc1 Da5 18.Tc6 Fd6 19.Rd3 Fa3 20.Ta6 Cc6 21.Ce2 Tc8 22.f8D Cb8 23.Df3 Tf8 24.Tc1 Tf4 25.Tcc6 Tc4 26.Td6 c6 27.Cc7 Tc3+ 28.Rd4 Cg4 29.Db6 Tb3 30.Cc3 Ce5 31.C3b5 Tb4+ 32.Rc5 d4 33.Dd5 cxd5 34.e4 Cec6 (début de la suite forcée) 35.Ce8+ Tc7 36.Cg7 g5 37.Ch5 h6 38.Cf4 g4 39.Cd3 Tb3+ 40.Cb4 Th3 41.gxh3
Trait aux Blancs :
1.c4 Cf6 2.c5 Cg8 3.c6 d6 4.e3 Dd7 5.a4 Df5 6.Cc3 Dc5 7.Ca2 Rd8 8.Ce2 Ch6 9.Cd4 g6 10.Fc4 Fg7 11.f4 Fh3 12.f5 Fe5 13.Fe6 d5 14.Cb5 Fd6 15.Re2 Dxc1 16.f6 Dc3 17.Tc1 Da5 18.Rd3 Ff5+ 19.Rd4 fxe6 20.Db3 Rc8 21.f7 Td8 22.f8D Fe4 23.Df3 Td7 24.cxd7+ Rd8 25.Tc6 Fa3 26.Td6 Ca6 27.Tc1 Tc8 28.Tcc6 Cb8 29.Ta6 c6 30.Cc7 Fd3 31.Db6 Cg4 32.Cb4 Fb5 33.Rc5 d4 34.Dd5 cxd5 35.Tc6 Ce5 36.Td6 Cec6 (début de la suite forcée : le clouage et la batterie sont intervertis) 37.Ce8+ Tc7 38.Cf6 g5 39.Ce4 h6 40.Cc3 Fd3+ 41.Cb5 Ff5 42.e4 Fh3 43.gxh3 g4 . (2005-06-26)
Hans-Jürgen Manthey: in der abspielbaren Lösung ist ein Fehler: 7.Tc8-c7 Sf7-e8+ 8.Se5-c6

da AV eine nicht schlüssige Notation verwand (T = Turm aber auch König), hier in lesbarer Notation :

a) 1.c4 Sf6 2.c5 Sg8 3.c6 d6 4.e3 Dd7 5.a4 Df5 6.Sc3 Dc5 7.Sa2 Kd8 8.Se2 Sh6 9.Sd4 g6 10.Lc4 Lg7 11.f4 Lh3 12.f5 Le5 13.Le6 d5 14.Sb5 Ld6 15.Ke2 Dxc1 16.f6 Dc3 17.Tc1 Da5 18.Kd3 Lf5+ 19.Kd4 fxe6 20.Db3 Kc8 21.f7 Td8 22.f8D Le4 23.Df3 Td7 24.cxd7+ Kd8 25.Tc6 La3 26.Td6 Sa6 27.Tc1 Tc8 28.Tcc6 Sb8 29.Ta6 c6 30.Sc7 Ld3 31.Db6 Sg4 32.Sb4 Lb5 33.Kc5 d4 34.Dd5 cxd5 35.Tc6 Se5 36.Td6 Sec6 37.Se8+ Tc7 38.Sf6 g5 39.Se4 h6 40.Sc3 Ld3+ 41.Sb5 Lf5 42.e4 Lh3 43.gxh3 g4

b) 1.e3 Sf6 2.Lc4 Sg8 3.Le6 fxe6 4.Ke2 Sh6 5.a4 g6 6.Sa3 Lg7 7.c4 Lf6 8.c5 Le5 9.c6 d5 10.f4 Dd6 11.f5 Dc5 12.f6 Kd8 13.f7 Te8 14.Sb5 Ld7 15.cxd7 Dxc1 16.Db3 Dc3 17.Tc1 Da5 18.Tc6 Ld6 19.Kd3 La3 20.Ta6 Sc6 21.Se2 Tc8 22.f8D Sb8 23.Df3 Tf8 24.Tc1 Tf4 25.Tcc6 Tc4 26.Td6 c6 27.Sc7 Tc3+ 28.Kd4 Sg4 29.Db6 Tb3 30.Sc3 Se5 31.S3b5 Tb4+ 32.Kc5 d4 33.Dd5 cxd5 34.e4 Sec6 35.Se8+ Tc7 36.Sg7 g5 37.Sh5 h6 38.Sf4 g4 39.Sd3 Tb3+ 40.Sb4 Th3 41.gxh3 (2020-03-23)
Henrik Juel: .
White captured cxd and g2xh3, and promoted on f8; Black captured cxd, f7xe6, and [wLc1]
Resolution plan: On h3 White uncaptures sL/T, which releases wSb5/Sb4, which releases sTc7
Possible retroplays
a) White to play
-1... g5 -2.g2xLh3 Lg4 -3.e3 Le2 -4.Sc3 Lb5 -5.Se4 g6 -6.Sf6 h7 -7.Se8 Tc8 -8.Sc7 Se5 -9.Tc6 Sg4 -10.Td6 c6xTe5 etc.
Tiny typo in 'official' retroplay: 7.Tc8-c7, not Se5-c6
b) Black to play
-1.g2xTh3 Tb3 -2.Sd3 Tb4 -3.Se5 g5 -4.Sg4 g6 -5.Sf6 h7 -6.Se8 etc. as above (2020-03-23)
comment
Keywords: Promotion (S)
Genre: Retro
FEN: 1n1k4/pprPp3/RQnRp2p/qNKp4/PN1pP1p1/b6P/1P1P3P/8
Reprints: 121 Europe Echecs 70 10/1964
Input: Gerd Wilts, 1995-06-03
Last update: Nikolai Beluhov, 2011-04-28 more...
27 - P0001306
Thomas R. Dawson
Falkirk Herald 17/06/1914
P0001306
(11+6)
#2
1. gxf6ep
play all play one stop play next play all

Duplicate Diagram: P1226354

in UT und Mat Plus spiegelverkehrt, ebenso in AA
hpr: Im Original erschien die Aufgabe spiegelverkehrt, wie Paul Valois im Original nachgesehen hat. Insofern dürfte die Aufgabe HIER falsch wiedergegeben sein. (2011-12-04)
Henrik Juel: TRD himself used this version in Retrograde Analysis, 1915, so maybe the Falkirk Herald editor got it wrong (2020-02-21)
Henrik Juel: White pawns captured all 10 missing black men, so last move was f7-f5, not d7-d5 that would interfere with [sLc8] (2020-02-21)
more ...
comment
Keywords: En passant, En passant as key, Symmetrical position
Genre: Retro
FEN: 4k3/1p2P2p/2N1P1N1/2PpKpP1/3PpP2/4P3/4P3/8
Reprints: 61B Retrograde Analysis 1915
35 Ultimate Themes 1938
22 Al Hamishmar 22/11/1945
274 Problemista 01-02/1965
178 Europe Echecs 104-105 10/1967
3 Chess unlimited 1969
212 FIDE Album 1914-1944/III 1975
84a 100 Classics of the Chessboard 1983
(49) Mat Plus 12 10-12/2009
1149 Augsburger Allgemeine 05/03/2011
H1 ASymmetrie 2013
Input: Gerd Wilts, 1995-06-03
Last update: Marcin Banaszek, 2020-02-20 more...
28 - P0001348
Miroslav Havel
The Chess Amateur 01/1922
P0001348
(12+11)
#3
klären: in Breuers "Ideengeschichte", S186, Nr.894 = Cas (dort steht beim benachbarten linken Problem "Chess Amateur". (VF)
Henrik Juel: To preserve black castling, we must retract b7-b6, sLa7 to f8, and e7xf6, etc.
If the white castling is also to be preserved, wK must be shielded from check from sLa5
But White runs out of preserving retractions, e.g.
-1... b7 -2.e2xSf3 Sd2 -3.a3 Lb6 -4.a2 La5, and -5.g3 ruins the white castling by preventing wTf7 from reaching h1 without moving wK
-1... Kd8 easily allows white castling, so the castlings are mutually exclusive (2019-11-24)
Henrik Juel: 1.000 thr. 2.Dxg7,T~xd7,Txg7,Te1+
Not 1.Td1? 000! (2019-11-24)
A.Buchanan: How about R: 1. ... b7-b6 2. e2xSf3 Sd2-e3+ 3. a3-a4 Lb6-a7 4. a2-a3 La5-b6 5. h3xLg4 b6xBc5 6. c4-c5 a7xSb6 7. Sa4-b6 Lb4-a5 8. S~ Lf8-b4 9. S~ e7xLf6, and I think from there I can retract all the way to game array, without losing castling rights for either side? sTh8 captured at home. Other Wh pawn captures dxc,exf,gxhxg. The forward play although it has a unique key move, is incredibly messy and dualistic. The fact that this problem has been so widely circulated makes me wonder if the diagram is correct. But Winchloe has the same diagram, although assigned to a magazine called Cas. (2019-11-24)
Mario Richter: R: 1. ... b7-b6 excludes sLc8 from the list of pawn-capturable black pieces, so 5. h3xLg4?? is illegal! (2019-11-24)
Henrik Juel: h3xYg4? would suffice to make Andrew right (where Y need not be L), but hxg requires too many captures by white pawns: dxc, exf, and gxhxg (4), because [Lc8,Th8] were not captured by pawns (2019-11-24)
more ...
comment
Keywords: Castling (wlsl), Castling, mutual exclusive
Genre: Retro
FEN: r3k1BQ/b1pp1Rpp/1p3pp1/2p5/P5P1/5P2/1PP2P1P/R3K3
Reprints: Problem 37-40 09/1956
(I) Problem 61-64 07/1959
(1) Problem 101-102 09/1966
222 Europe Echecs 130 09/1969
(D) Die Schwalbe 1 10/1969
(BI) Die Schwalbe 4 04/1970
(11) Problem 144-147 12/1971
(E) Die Schwalbe 16 10/1972
(IV) Die Schwalbe 27 06/1974
(3) diagrammes 46 07-08/1980
Input: Gerd Wilts, 1995-06-03
Last update: A.Buchanan, 2019-11-25 more...
29 - P0001455
Alexander Kislyak
Die Schwalbe 1976
1. Preis
P0001455
(12+14)
#1 (wer?)
1. ... Sxb2#? - aber Schwarz hat zuletzt gezogen

1. Sxc4#

R: 1. ... Se3-c4 2. Sd3-b2 Sg2-e3 3. Se5-d3 Se1-g2 4. Sg6-e5 Sg2-e1 5. Sf8-g6 Se1-g2 6. f7-f8=S Sg2-e1 7. f6-f7 Se1-g2 8. f5-f6 e2-e1=S 9. f4-f5 e3-e2 10. f3-f4 f4xLe3 11. Ld4-e3 f5-f4 12. Lb2-d4 f6-f5 13. Lc1-b2 f7-f6 14. b2-b3 Sb3-a1 15. h2-h3
play all play one stop play next play all
Unglaublich, wie die 4 weißen Bauern e-h mit ihren Schritten haushalten müssen, damit am Ende der Weg für den weißen Königsturm und den umgewandelten schwarzen Läufer a7 nicht versperrt wird.
Dr. K. Fabel-Gedenkturnier
Henrik Juel: Typos:
The solution should read something like
1.Sxc4# (not 1... Sxb2??)
(because the retroplay shows that White has the move)
The last retraction in the given retroplay should read h2-h3, not h2-h1
Finally, the current PDB standard is to write the white retraction first, so the retroplay should read something like
-1... Se3 -2.Sd3 Sg2 ... -14.b2 Sb3 -15.h2
(Yes, I know that the animation machine requires full retro notation, but abbreviated notation is so much easier to write and to read...) (2019-11-10)
Henrik Juel: This fine retro deserves a closer look, I think
White captured [Lf8] and axb (to promote on b8, as Ld8 cannot get home to c1)
Black captured bxc, c7xd6, a third pawn capture to promote [Pf7] or [Ph7] to L on a black square, and a fourth capture to promote the other missing black pawn (since White did not capture a black pawn on the f- or h-file)
So Black did not capture [Lc1] on c1, and the plan for the retro play is to unpromote wSb2 on f8 and retract the resulting wP to f3 (not to f2, as sLa7 must unpromote on g1), allowing sSc4 to unpromote on e1 and letting the resulting sP uncapture on e3 a dark-squared wL, which goes to c1, permitting b2-b3 and Sb3-a1
The two knights cannot change the tempo, h2-h3 is needed at the end, and d3-d4 would prevent a white rook to get home to h1, so we can determine which camp starts the retroplay (2019-11-11)
comment
Keywords: Whose move?
Genre: Retro
FEN: rRbB4/bBqpp1p1/1krp4/2p5/K1n1P3/RP4PP/pNPP4/n7
Reprints: 329 Europe Echecs 225/226 10/1977
feenschach 41 01-03/1978
632 FIDE Album 1974-1976 1980
(2) Die Schwalbe 103 02/1987
Input: Gerd Wilts, 1995-06-03
Last update: Mario Richter, 2019-11-12 more...
30 - P0001571
Marko Klasinc
Matjas Zigman

1649 feenschach 30 10/1975
1. Preis e.a.
P0001571
(12+15)
Welches war der erste und letzte Zug des fehlenden Turms?
R: 1. Th5-h1 c7-c6 2. h2xBg3 g4-g3 3. Tc5-h5 g5-g4 4. Sf5-e7 Te7-f7 5. Se3-f5 Lh5-e8 6. Kf1-e1 Te8-e7 7. Kg1-f1 Ta8-e8 8. Sf1-e3 Db1-a2 9. Ld6-f8 Ka2-a3 10. Le5-d6 Dc1-b1 11. Ld4-e5 a3xTb2 12. Tb1-b2+ a4-a3 13. Se3-f1 Da3-c1+ 14. Tf1-b1 a5-a4 15. 0-0
Erster Zug: 0-0, letzter Zug: Tb1-b2+
play all play one stop play next play all
Henrik Juel: The further retroplay includes something like
-33.Da3-b4 Ka2-b1 -34.Dc1-a3+ to get wD home, then wL to c1, and b2-b3 (2020-03-06)
comment
Keywords: Castling (wk), First Move?, Last Move?
Genre: Retro
FEN: 4bBnQ/3pNrbr/2p1pp1p/8/8/kPP3P1/qppPPPP1/n3K2R
Reprints: feenschach 37 01-03/1977
634 FIDE Album 1974-1976 1980
441 Europe Echecs 313 01/1985
Input: Gerd Wilts, 1995-06-03
Last update: Gerd Wilts, 2002-06-08 more...
31 - P0001763
Philippe Leroy
Phénix 1989
To the memory of Jean Bertin
P0001763
(14+14)
#1
Andersen-Eröffnung 1. a3
1. Txd7#
R: 1. ... Td1xDd2 2. Dc2-d2 Td2-e2 3. Se2-c1 Tc1-d1 4. Sf4-e2 Td1-c1 5. Sd5-f4 Tc1-d1 6. Sb4-d5 Td1-c1 7. Te8-e7 Tc1-d1 8. Ld6-f8 Td1-c1 9. Th8-e8 Tc1-d1 10. h7-h8=T Td1-c1 11. h6-h7 Tc1-d1 12. g5xSh6 Sg4-h6 13. Lf4-d6 Se5-g4 14. Sd5-b4 Sc6-e5 15. Le5-f4 Sb4-c6 16. Dd1-c2 Sc2-b4 17. Dg4-d1 Td1-c1 18. Tc1-b1 Sb4-c2 19. Lb1-a2 Sa6-b4 20. Lc2-b1 Sb4-a6 21. Tb1-c1 Tc1-d1 22. Ld1-c2 Sc2-b4 23. Le2-d1 Td1-c1 24. Tc1-b1 Ka2-a3 25. Sf4-d5 Sb4-c2 26. Sc2-a1 Sc6-b4 27. Sh3-f4 Ka3-a2 28. Sb4-c2 Se7-c6 29. Tc2-c1 Ta1-d1 30. Sd5-b4 Ka2-a3 31. Df4-g4 Kb1-a2 32. Lg4-e2 Ta4-a1 33. Df3-f4 Tb4-a4 34. a4xDb5 Ka2-b1 35. Tc1-c2 Db6-b5 36. Dd1-f3 Dd8-b6 37. Dc2-d1 Tb6-b4 38. Lf3-g4 Ta6-b6 39. Le2-f3 Ta8-a6 40. Kb4-c3 a7-a5 41. Kb5-b4 Td1-d2 42. Lf4-e5 Ka3-a2 43. g4-g5 Lb4-e1 44. Sc3-d5 Tg1-d1 45. Se4-c3 Tg3-g1 46. Th1-c1 Sg8-e7 47. Lf1-e2 Lf8-b4 48. Dd1-c2 Tf3-g3 49. c2-c4 Sc4-b2 50. Sg1-h3 Sa5-c4 51. Kc4-b5 Sc6-a5 52. Kc3-c4 Sb8-c6 53. Kd2-c3 Kb4-a3 54. Ke1-d2 c4xTd3 55. b2-b3 c5-c4 56. e2-e3 c7-c5 57. Lc1-f4 Tf6-f3 58. Ta3-d3 Th6-f6 59. Sc3-e4 Kc5-b4 60. d2-d4 Kd6-c5 61. Ta1-a3 Th8-h6 62. Sb1-c3 Ke7-d6 63. g3-g4 Ke8-e7 64. g2-g3 e7-e6 65. a3-a4 h7-h5 66. a2-a3
play all play one stop play next play all
Die Steine wKc3, wBb3c4d5e3f2, sTd2, sLe1, sSb2, sBd3 sind innerhalb des südlichen Käfigs besonders verklemmt. Der wBb5 darf erst dann nach a4 zurückschlagen, wenn ein sT aus dem südlichen Käfig befreit worden ist.
Ein stark verklemmter Käfig, der nur mit langwierigen Manövern aufzulösen ist, allerdings erkauft durch eine sehr starke Zusatzbedingung (1. Zug des wBa2 war a2-a3, was wohl vorrangig dem Ausschluß der Rücknahme a2xb3 dient).
Die auf h8 zu entwandelnde Figur ist nicht eindeutig bestimmt, statt des wT könnte dort auch ein wS entwandeln.
Pascal Wassong: The author of this problem is Philippe Leroy.
The stipulation adds : Anderssen beginning : 1.a3.
It is dedicated to the memory of Jean Bertin. (2002-09-11)
Hans-Jürgen Manthey: die Abspielvariante hat einige Fehler, zB 23.Tc1-d1
Lösung mit 1.a2-a3:
R: 1.Td1xDd2 Dc2-d2 2.Td2-e2+ Se2-c1 3.Tc1-d1 Sf4-e2 4.Td1-c1 Sg6-f4 5.Tc1-d1 Sh8-g6 6.Td1-c1 h7-h8S 7.Tc1-d1 g6xSh7 8.Td1-c1 Tc1-b1 9.Sf6-h7 Tb1-c1 10.Se8-f6 Tc1-b1 11.Sc7-e8 Tb1-c1 12.Sa6-c7 Tc1-b1 13.Sb4-a6 Tb1-c1 14.Tc1-d1 Dd1-c2 15.Sc2-b4+ Dg4-d1 16.Td1-c1 Tc1-b1 17.Sb4-c2 Lb1-a2 18.Ka2-a3 Lc2-b1+ 19.Sc6-b4 Tb1-c1 20.Tc1-d1 Dg3-g4 21.Sb4-c6 Ld1-c2 22.Sc2-b4+ Lg4-d1 23.Td1-c1 Tc1-b1 24.Sb4-c2 Sc2-a1 25.Sc6-b4 Dg1-g3 26.Ka3-a2 Sb4-c2+ 27.Sb8-c6 Tc2-c1 28.Ta1-d1 Sc6-b4 29.Ka2-a3 Se5-c6 30.Kb1-a2 Sf3-e5 31.Ta4-a1 Df1-g1 32.Tb4-a4 a4xDb5 33.Dc6-b5 Sg1-f3 34.Tb6-b4 Lf3-g4 35.Ta6-b6 Lg2-f3 36.Ta8-a6 Kb4-c3 37.a7-a5+ Ka3-b4 38.Td1-d2 Sf3-g1 39.La5-e1 De2-f1 40.Ld8-a5 Lh3-g2 41.Tg1-d1 Kb4-a3 42.Ka2-b1 Kc3-b4 43.Ka3-a2 Kd2-c3 44.Kb4-a3 Tc1-c2 45.Ka5-b4 g5-g6 46.Kb6-a5 c2-c4 47.Tb4-b1 Te8-e7 48.Kc7-b6 Ke1-d2 49.Sc4-b2 La3-f8 50.Le7-d8 Th8-e8 51.Lf8-e7 Th6-h8 52.Kd8-c7 Tf6-h6 53.Ke8-d8 Sd2-f3 54.Dc7-c6 Tf3-f6 55.Tf4-g4 Tg3-f3 56.Dd8-c7 Ta1-c1 57.Sd6-c4 Tg1-g3 58.c4xSd3 Dd1-e2 59.Tf6-f4 Se5-d3 60.Th6-f6 Sf3-e5 61.Th8-h6 Th1-g1 62.Sf5-d6 Lf1-h3 63.Sh6-f5 Lc1-a3 64.Sg8-h6 a3-a4 65.c5-c4 Sg1-f3 66.c7-c5 e2-e3 67.h7-h5 g4-g5 68.Lb4-f8 g2-g4 69.Ld6-b4 Sb1-d2 70.Le7-d6 b2-b3 71.Lf8-e7 d2-d4 72.e7-e6 a2-a3 (2020-03-24)
Henrik Juel: Thanks for posting a correct retro-play, Hans-Jürgen
Now a super-user can relatively easily change the official solution, so the rest of us can watch the animation
Another time you can make it even easier by having a space after each . (this is required for the animation to work). Also, I believe that most users prefer the convention n. [white retraction] [black retraction]
For this problem
R: 1. ... Td1xDd2 2. Dc2-d2 Td2-e2+ etc. (2020-03-24)
Hans-Jürgen Manthey: Henrik Juel verstanding 1. Td1xDd2 usw. and not 1.Td1xDd2 (2020-03-25)
comment
Keywords: Whose move?
Genre: Retro
FEN: 2b2B2/1p1pRpp1/4p3/pP5p/2PP4/kPKpP3/Bn1rrP1P/NRN1b3
Input: Gerd Wilts, 1995-06-03
Last update: Mario Richter, 2020-03-25 more...
32 - P0001914
Roland Baier
Johannes M. Ott

3721 Mat (Belgrade) 11-12/1982
M. Kovacevic gewidmet
1. ehrende Erwähnung
P0001914
(12+13) C+
BP in 18,5
1. h4 f5 2. h5 Kf7 3. h6 Kf6 4. hxg7 h5 5. Th4 Sh6 6. Ta4 h4 7. g8=D h3 8. Df7+ Kg5 9. De8 h2 10. Dxd8 h1=S 11. Dxc8 Sxf2 12. De8 Sxd1 13. Df7 Sxb2 14. Db3 Sxa4 15. La3 f4 16. Db2 Sf5 17. Dc1 Th1 18. Dd1 Kh4 19. Lc1
play all play one stop play next play all
Vladimir Rey: Update: 3721 Mat (Belgrade) 11-12/1982, M. Kovacevic gewidmet (2020-04-15)
comment
Keywords: Unique Proof Game, Homebase (W), Promotion, Pronkin Theme (D), under-promotion (s), Non-standard material
Genre: Retro
Computer test: Natch 2.2 Copyright (C) 1997,98,99,2001,2002,2003 Pascal Wassong
FEN: rn3b2/ppppp3/8/5n2/n4p1k/8/P1PPP1P1/RNBQKBNr
Reprints: 987 FIDE Album 1980-1982 1988
33 Shortest Proof Games 11/1991
Input: Gerd Wilts, 1995-06-03
Last update: Alfred Pfeiffer, 2020-04-15 more...
33 - P0001945
Samuel Loyd
Texas Siftings 1888
P0001945
(2+7) C+
#3
Entweder 1. Dd4! oder 1. Dg5!
play all play one stop play next play all
Loyds Lösung:
Wenn K oder Ta8 zuletzt zogen, dann 1. Dg5 Kd8 2. Dd5+ 1. ... Kf8 2. De7+
Wenn K oder Th8 zuletzt zogen, 1. Dd4 Tg8 2. Dd7+
AB: Is this really cooked if properly declared as RV?
1 Qd4! if kside not ok, 1 Qg5! if qside not ok, and both solutions work if neither castling ok. This latter overlap is not a defect, in that both winning lines are otherwise forced. Or is there some other winning line that I am missing? (2001-10-17)
GW: The problem is indeed not cooked but C+! (2001-10-17)
Andrew Buchanan: Note also the try 1.Qc5? which is defeated by either castling. (2010-03-01)
Sally: Zwei Teilaufgaben:
1. 0 0 0 (Zulässig): 1.Dd4+ -Tg8, 2. Dd7+ -Kf8, 3.Dxe7#.
2. 0 0 (zulässig): 1.Dg5! -Kd8, 2. Dd5+ -K bel. 3.Dxa8#.
Auch wenn Ke8 zuletzt war, gibt es diese 2 Lösungen! (2010-06-26)
Adrian Storisteanu: But when Ke8 has moved, *three* solutions work, not just the two (1.Qd4/g5/c5!)!? (2019-12-31)
A.Buchanan: Under PRA (as it's more often called today) we apply the conventions to find the local maxima, where we can't apply the conventions any more. There are basically 4 possibilities: KQ, K-, -Q, --. KQ is impossible. But K- & -Q are local maxima, so we have to solve them. -- is not a local maxima: we can apply the castling convention in one of two ways, to reach K- or -Q. So we don't have to solve --. Is that ok? (2019-12-31)
A.Buchanan: To say we need a sound solution for K-, -Q & --, is analogous in a one castling situation to saying we need a sound solution for both K & -. It's not reasonable. That is where PRA in its wisdom leads us to the right cases. (2020-01-01)
comment
Keywords: Cant Castler, Partial Retro Analysis (PRA), Castling (sksg), Minimal
Genre: Retro
FEN: r3k2r/p1p1p2p/4K3/8/8/4Q3/8/8
Reprints: 64 Sam Loyd and his Chess Problems 1913
64 Sam Loyd und seine Schachaufgaben 1926
Comoedia 23/07/1933
599 Sachove umeni 25/04/1949
33 32 personaggi e 1 autore 1955
(G) Die Schwalbe 16 10/1972
Problem 152-156 04/1973
(D15) feenschach 27 04/1975
(5) Die Schwalbe 86 04/1984
(I) Die Schwalbe 234 12/2008
(1) Die Schwalbe 241 02/2010
Input: Gerd Wilts, 1995-06-03
Last update: Alfred Pfeiffer, 2016-03-30 more...
34 - P0001972
Thomas R. Dawson
Pittsburgh Post 1923
P0001972
(16+11)
h#1
1. cxd3ep Kd4#

R: 1. d2-d4 Tf5-f6 2. Sf6-g4+ Td5-f5 3. Sf5-h4+ Td3-d5
play all play one stop play next play all
Cook: Henrik Juel (2005-2-18): R: 1. Le5-g3 Tf5-f6 2. Lf6-e5+ Td5-f5 3. d2-d4 Td3-d5 etc.
auch in der Zeitschrift 'The Chess Problem' exakt mit dieser Stellung nachgedruckt, als Quelle ist dort (in der Rubrik "Selected From Early Days") genannt: "Italia Scac. 1917".

Falls tatsächlich ein Druckfehler vorliegt, und der wLg3 nach f2 gehört, scheint er sich weit verbreitet zu haben ...
Henrik Juel: 0... cxd3ep 1.Kd4#. -1.d2 Tf5 -2.Sf6 Td5 -3.Sf5 Td3 etc. (2004-03-18)
Henrik Juel: The problem is incorrect, because the retroplay could also be -1.Le5 Tf5 -2.Lf6 Td5 etc. (2005-02-18)
Mario Richter: Since there's also the even more trivial retroplay 0. ... f2-f3 Tf5-f6 1. Sf6-g4+ Tf3-f5 2. Sf5-h4+, my guess is, that the diagram is misprinted and that the wLg3 should be placed on f2. Doing so, the ep-key is justified, because in this case White's last move must have been d2-d4 (to provide d3 as a square for the black rook). (2011-08-19)
Mario Richter: A sin from my youth - today I do not see how the retroplay can be continued after 0. ... f2-f3 Tf5-f6 1. Sf6-g4+ Tf3-f5 2. Sf5-h4+ ???
So Henrik's cook is the only one, but I still think that my suggested correction is valid. (2019-10-18)
A.Buchanan: I agree with Mario. And it feels like a bug rather than a typo. This problem does not appear in WinChloe, either in source or number of pieces, so I can't check. (2019-10-19)
comment
Keywords: En passant, Last Moves?, Retro Opposition, En passant as key
Genre: h#, Retro
FEN: 3R2n1/p2PPprP/P2pkrRq/2P3pp/2pPK1NN/4QPBB/6P1/8
Reprints: The Chess Problem (Whitburn)
Input: Gerd Wilts, 1995-06-03
Last update: Mario Richter, 2019-10-18 more...
35 - P0002008
Frideswide F. Rowland
Leeds Mercury 12/12/1896
P0002008
(12+4)
#2
-sBb5, dann (a) 1. Ka4 droht 2. Sa5#
play all play one stop play next play all
Die Stellung ist wegen eines fehlenden schwarzen Schlagobjekts illegal. Weiß hat im letzten Zugep geschlagen und dabei vergessen, den sBb5 vom Brett zu nehmen.
A.Buchanan: This one involves the completion of the *penultimate* move (ep), after which Black played Rxe5+. wPh2 is superfluous. (2020-02-10)
comment
Keywords: En passant, Illegal position, Joke, Finish or retract an unfinished move
Genre: Retro
FEN: 6B1/7p/PPP5/Kp1r4/2k5/BNP5/P1PP3P/8
Reprints: 8 Retrograde Analysis 1915
67 Fern vom Alltag 1925
Input: Gerd Wilts, 1995-06-03
Last update: A.Buchanan, 2020-02-10 more...
36 - P0002033
Niels Høeg
Tidskrift för Schack 03/1904
P0002033
(15+12)
1) Welches waren die letzten 3 Züge von Weiß?
2) Statt dessen zieht Weiß und setzt in drei Zügen auf e8 mat
R: 1. e7xDf8=T# Kd8-e8 2. d6xSe7+ Sd5-e7+ 3. Df7-f6+
play all play one stop play next play all
Tg8 is the white a-rook, Tc7 is the black h-rook, and both passed g3 or g4 before the barrier was closed. The black a-rook was captured on a8 or b8, the white h-rook was captured south-west of the barrier.
The try R: 1.Tf7xDf8# Kd8-e8 2.Te7-f7+ Ke8-d8 3.Tf7-e7+ fails because of perpetual uncheck.
translation:
1) What were White's last 3 moves?
2) Instead of these moves, White mates in 3 on e8

Zusammen mit P0002034 als Mini-Preislösungsturnier abgedruckt.
Henrik Juel: The intention for part 2 of the stipulation is probably 1.Dxd7+ Lxd7 2.Txf8+ Le8 3.Txf8#
But this part is silly and almost surely not due to Høeg; it may have been added by the editor of 150 Schachkuriositäten in an attempt to make Høeg's problem curiousser...
Part 2 is not mentioned in Retrograde Analysis
I suggest that you delete part 2 again, Andrew; sorry about your wasted effort (2020-04-28)
Mario Richter: The original publication has both parts of stipulation exactly as given here. Perhaps the superflous part 2) was omitted in 'Retrograde Analysis' to let the problem appear more serious ... (2020-04-28)
Henrik Juel: Thank you Mario, that settles the question, and problem should stay as it is now in the PDB
But it is interesting that part 2 was also omitted in an article in Aarsskrift 1935 by Knud Hannemann on barriers in retro-analysis
Maybe we should blame the editor of Tidskrift för Schack, who may have wanted identical stipulations for his mini solving tourney; in P0002034 the forward stipulation #3 works fine (the promotion dual to DL was not considered a flaw then), whereas here the silly condition of mate on e8 is needed to reach #3 (2020-04-28)
Henrik Juel: There is another try for the retroplay:
R: 1.Tf7xSf8# Sh7-f8+ 2.Th8xDg8+ (or 2.Th8xSg8+)
It fails because we cannot explain the two white rooks, as an unpromotion of one of them would require two white pawn captures (cxdxe), but only one is possible now (2020-04-28)
Henrik Juel: Now I regret blaming innocent editors
Around 1900 retractors (with backward and forward play) were in high fashion
It was only with the advent of Retrograde Analysis in 1915 that pure retro-analysis (without forward play) also became acceptable for the general chess problem community (2020-04-28)
more ...
comment
Keywords: Last Moves? (5), Promotion, Constrained problem
Genre: Retro
FEN: 1bb1kRR1/pprp2p1/2B1pQKp/P1p1Np1N/5P2/6PP/1P1PP3/2B5
Reprints: 50 150 Schachkuriositäten 1910
21A Retrograde Analysis 1915
2 Aarsskrift DSK , p. 17, 1935
Input: Gerd Wilts, 1995-06-03
Last update: Mario Richter, 2020-04-28 more...
37 - P0002049
Steiner
Aachener Anzeiger 08/1912
P0002049
(16+13)
Nehme einen Zug zurück, dann #1
R: 1. 0-0, dann 1. 0-0-0#
play all play one stop play next play all
vgl. P1317143
Henrik Juel: -1.0-0, 1.0-0-0#. (2004-03-08)
Henrik Juel: The uncastling is forced, allowing -1... Dh2 to avoid retro-stalemate (2020-04-16)
Henrik Juel: The Retrograde Analysis reprint gives S. Steiner as author and Magyar Sakkujsag as source (2020-04-16)
comment
Keywords: Castling in the retro play (wk), Help retractor, Castling in the forward play (wg)
Genre: Retro
FEN: 8/2pppp2/1p4p1/p4P1p/3PPQbr/PP1kBBrq/1PN1NPP1/R4RK1
Reprints: 29 Retrograde Analysis 1915
Input: Gerd Wilts, 1995-06-03
Last update: Mario Richter, 2020-04-15 more...
38 - P0002092
Karl Portius
35 Leipziger Illustrirte Zeitung 24/08/1844
P0002092
(5+6)
#2
1. gxf6ep+ Ke8 2. Sd6#
Der En passant-Schlag kann nicht begründet werden.
play all play one stop play next play all
Erschien mit folgendem Begelttext:
In einem Club spielten zwei mittelmäßige Spieler mit einander, als derjenige, der die Weißen hatte, ausrief: "Wenn Sie so ziehen, werden Sie gleich Matt." Bei diesen Worten trat der Präsident des Clubs, ein berühmter Meister, an das Schachbrett und erklärte: Weiß könne unmöglich Matt geben. Weiß ließ sich aber nicht stören, zog und setzte mit dem zweiten Zuge Matt; und der Herr Präsident konnte weiter nichts sagen als "Ah, so!"
In a club, two mediocre players were playing with each other when White exclaimed: "If you move like this, you'll mated." With these words, the president of the club, a famous master, stepped up to the chess board and said: White couldn't possibly Mate. White did not allow himself to be disturbed, however, and moved and mated Black on the second move; and the Mr. President could say nothing more than "Oh I see!"

from Dawson & Hunsdorfer, 1915:
"The actual origin of the en passant analytic is not certain. Way back in 1944, a year before the publication of the Indian problem, old Portius, the genial editor of the Leipzig Illustrated, published No. 53A [this problem] in connection with one of his chess tales. It is simply a trick problem, quite free of any thought of analysis, but we quote it for its historical significant. It set solvers' brains in action, and suggested the possibility of an analytic en passant key. [...] No. 53 [P0001360, 1858] fourteen years after No. 53A, is analytically sound, but unfortunately unidentified." [Author now known to be Max Lange.]
So this is a joke rather than cooked.
Henrik Juel: From the story we know that White can mate in two
this is possible only if last move was f7-f5
then C+ by Popeye 4.61 (2017-09-09)
A.Buchanan: These days this would be regarded as a constrained problem, rather than a joke. wLg4 serves no purpose, as far as I can see. (2020-02-10)
comment
Keywords: En passant, Joke (en passant), Constrained problem (mate exists)
Genre: Retro
FEN: 3n1n2/3bk3/4p2N/5pP1/4N1B1/5K2/8/8
Reprints: 53A Retrograde Analysis 1915
Input: Gerd Wilts, 1995-06-03
Last update: A.Buchanan, 2020-02-10 more...
39 - P0002097
A. Muller
Münchner Neueste Nachrichten 1914
P0002097
(9+9)
#3
1. hxg6ep hxg6+ 2. Kxg6 f1=D,~ 3. e7#
play all play one stop play next play all
Henrik Juel: 1.hxg6ep hxg6+ 2.Kxg6. Not -1... Ke8/Kg8? -2.g6xf7, requiring 7 black captures on dark squares, excluding orig. Lf1. One of my favorite P retros. (2004-03-08)
Henrik Juel: Some more analytical details:
White pawns captured the missing seven black men with a2xb3xc4xd5xe6, b2xc3xd4, and gxf
Black captured a7xb6xc5xd4xe3xf2 on dark squares and made two more pawn captures (like fxgxf) to rectify the pawn inversion on the f-file
Last move was not Ke8-f8 or Kg8-f8, as this would entail the immediate uncheck g6xf7+ (with double pawn inversion), so the extra two black pawn captures would have been the cross-capture g5xf4 and f6xg5, also on dark squares; but [wLf1] is light-squared
All other feasible last moves by Black are clearly also illegal, except for g7-g5, so the en passant key is legitimized
C+ by Popeye 4.61 and analysis (2020-06-11)
A.Buchanan: This is a very nice way of reasoning about the old off-colour bishop (2020-06-12)
Henrik Juel: I expect that the author is german and that his last name should be spelled Müller
In the PDB there are four Mullers three of which are non-german, and a multitude of german Müllers
In RA (1915) the spelling is A. Muller everywhere except for a piece of text on p.185 saying
'combining in a form due entirely to A. Müller' (two problems on the same page still say 'after A. Muller')
Mario, could you check the spelling in the original source (MNN), please (2020-06-13)
comment
Keywords: En passant, Kindergarten Problem, Volet Pawn
Genre: Retro
FEN: 5k2/1pp2P1p/3pPP2/4pKpP/3P1p2/4P3/2PP1p2/8
Reprints: 56 Retrograde Analysis 1915
Input: Gerd Wilts, 1995-06-03
Last update: A.Buchanan, 2020-06-12 more...
40 - P0002105
Walter Irving Kennard
The Illustrated London News 27/12/1890
P0002105
(9+4)
#3
1. bxc6ep! g6 2. c7 g5 3. c8=S#
1. ... g5 2. Kc4 Kxa6 3. Kc5#
play all play one stop play next play all
Henrik Juel: C+ by Popeye 4.61 (2020-04-02)
more ...
comment
Keywords: En passant, En passant as key, under-promotion (S), Promotion in the mating move
Genre: Retro
FEN: 8/p5p1/Pk1P4/NPpKP3/6P1/1N6/4B3/8
Reprints: 61 Retrograde Analysis 1915
Input: Gerd Wilts, 1995-06-03
Last update: Alfred Pfeiffer, 2020-04-02 more...
41 - P0002247
Michel Caillaud
Mat (Belgrade) 1982
2. ehrende Erwähnung
P0002247
(13+15) C+
BP in 27,0
1. b4 Sc6 2. b5 Se5 3. b6 c6 4. bxa7 Db6 5. Sc3 Db1 6. a4 b5 7. a5 Lb7 8. a6 0-0-0 9. a8=S Sh6 10. Sc7 Sf5 11. Se6 h6 12. Sg5 hxg5 13. a7 Th3 14. a8=S Td3 15. Sc7 La8 16. Se8 Kb7 17. Sd6+ exd6 18. h4 Le7 19. h5 Tf8 20. h6 Ld8 21. h7 Lc7 22. h8=S Lb8 23. Sg6 fxg6 24. Th4 Tf6 25. Td4 Sh4 26. e4 Sef3+ 27. Ke2 Te3+
play all play one stop play next play all
Vladimir Rey: Update: 3722 Mat (Belgrade) 11-12/1982 (2020-05-11)
comment
Keywords: Ceriani-Frolkin Theme (SSS), Unique Proof Game, Castling
Genre: Retro
Computer test: Resolution time : 4 h 17 mn 54.29 s., Natch 2.3 Copyright (C) 1997,98,99,2001,2002,2003,2004 Pascal Wassong
FEN: bb6/1k1p2p1/2pp1rp1/1p4p1/3RP2n/2N1rn2/2PPKPP1/RqBQ1BN1
Reprints: 29 Shortest Proof Games 11/1991
Input: Gerd Wilts, 1995-06-03
Last update: Gerd Wilts, 2006-01-09 more...
42 - P0002287
Geza Schweig
Tükör 1938
P0002287
(15+14) C+
BP in 4,0
1. Sc3 d6 2. Sd5 Sd7 3. Sxe7 Sdf6 4. Sxg8 Sxg8
play all play one stop play next play all
Jeff Coakley in 'The Puzzling Side of Chess': "This proof game was published in 1938 in the Budapest periodical 'Tükör' (Magyar for "mirror"). The name is often given incorrectly as 'Tukon'."
A.Buchanan: Apparently a mirror-image of Mortimer's original P0002288 (2020-05-23)
comment
Keywords: Unique Proof Game, Homebase (w), Impostor
Genre: Retro
FEN: r1bqkbnr/ppp2ppp/3p4/8/8/8/PPPPPPPP/R1BQKBNR
Reprints: 2715 FEENSCHACH 09-10/1955
Die Schwalbe 42, p. 594, 12/1976
Die Schwalbe 71 10/1981
(II) Schachkalender 1987
99 Shortest Proof Games 11/1991
18 Introduction to Proof Games 03/2010
6 The Puzzling Side of Chess 8 18/08/2012
Input: Gerd Wilts, 1995-06-03
Last update: Mario Richter, 2020-05-24 more...
43 - P0002288
Ernest Clement Mortimer
Andriy Frolkin

Die Schwalbe 71 10/1981
E.Mortimer v A.Frolkin
P0002288
(15+13) C+
BP in 4,0
1. Sf3 e5 2. Sxe5 Se7 3. Sxd7 Sec6 4. Sxb8 Sxb8
play all play one stop play next play all
Version A. Frolkin. Die Originalfassung war mit sBd5 und e7.
Another version is reflected left-to-right.
YM: Possible symmetrical game:

BP in 4,0 (15+13) C+

1. Sc3 d5 2. Sxd5 Sd7 3. Sxe7 Sdf6 4. Sxg8 Sxg8

and even improved versions:

BP in 4,5 (13+15) C+

1.e3! (tempo) Sf6 2.e4 Sxe4 3.Se2 Sxd2 4.Sc3 Sxb1 5.Sxb1.

BP in 4,5 (13+15) C+

1.d3! (tempo) Sc6 2.d4 Sxd4 3.Sd2 Sxe2 4.Sf3 Sxg1 5.Sxg1. (2016-09-27)
A.Buchanan: These days, the style seems to be more common to mark as "BP in exactly 4.5", if a shorter proof game exists. (2018-10-01)
Olaf Jenkner: Isn't it anticipated by Schweig (P0002287) ? (2018-10-01)
A.Buchanan: We don't know when Mortimer published his original: but his 12 publication dates in PDB are between 1917 & 1935, while Schweig's composition is 1938.
The Imperial War Museum in UK has 4kg of private papers of Mortimer, who was a Chaplain in WW1, serving in Egypt and Palestine from 1916-1919, see https://www.iwm.org.uk/collections/item/object/1030014260. Given that overlaps with his publication career, we might see some mention of chess in these papers, to address the vexed question of this famous composition.
Mortimer was still active in 1959, when he published on Blaise Pascal 12-Feb-1959 London Methuen. See: "Catalog of Copyright Entries. Third Series: 1959: Jan-Jun".
In any case, if Mortimer anticipated Schweig, then Frolkin follows Mortimer. Otherwise, Schweig anticipated Mortimer, and Frolkin can be considered to follow Schweig. (2020-05-23)
Yoav Ben-Zvi: The position (along with its mirror image) also solves the construction task: Position with shortest possible sound SPG showing Sibling Impostor", 2 solutions. (2020-05-24)
A.Buchanan: I think there are 4 solutions to this task in 4.0 moves: this, and Schweig, and their respective mirror images. The original Mortimer (+sBd5e7, as mentioned above) wasn't sound, but maybe that wasn't what Mortimer was aiming at. There are a bunch of other SPGs in 4.0 where instead of wS raiding, its wQ or wB, e.g. rnbqkb1r/1ppp1ppp/8/4p3/8/2P5/PP1PPPPP/RNB1KBNR. But nothing shorter I think (2020-05-24)
more ...
comment
Keywords: Unique Proof Game, Homebase (2), Impostor (s)
Genre: Retro
FEN: rnbqkb1r/ppp2ppp/8/8/8/8/PPPPPPPP/RNBQKB1R
Reprints: 100 Shortest Proof Games 11/1991
(5) diagrammes 103 10-12/1992
6 Introduction to Proof Games 03/2010
06b The Puzzling Side of Chess 8 18/08/2012
72 The Puzzling Side of Chess 141 16/12/2018
Input: Gerd Wilts, 1995-06-03
Last update: A.Buchanan, 2020-05-23 more...
44 - P0002302
Kostas Prentos
5426 feenschach 89 10-12/1988
Ehrende Erwähnung
P0002302
(14+13)
BP in 18,0
1. c4 Sc6 2. c5 Se5 3. c6 dxc6 4. Db3 Lh3 5. Kd1 Sg4 6. Kc2 Dd3+ 7. Kxd3 0-0-0+ 8. Ke4 f5+ 9. Kxf5 e6+ 10. Kxe6 Lc5 11. Kf7 Td6 12. Kf8 Se7+ 13. Dg8 Sh6 14. b3 Ld7 15. La3 Le8 16. Lb4 Td8 17. Sa3 Ld6 18. Tc1 Txg8#
play all play one stop play next play all
paul: 2 x Indian theme. (2018-11-09)
Henrik Juel: Euclide 1.01 ran for more than an hour, producing nothing
But the first 17.5 moves were tested correct in 8 minutes (2018-11-09)
Henrik Juel: Good proof game, considering its age
The black bishops go Lc8-h3-d7-e8 and Lf8-c5-d6 with interferences (including a swithcback by Td8) after their first moves to let Kf8 through (2018-11-09)
François Labelle: The last move must be Th8xg8, so Henrik's test in 17.5 moves plus three similar tests with white S, L, T at g8 (returning no solutions) should be considered an HC+ proof of correctness. (2018-11-10)
Henrik Juel: Good point, Francois
What does HC+ stand for? (2018-11-10)
Henrik Juel: ... never mind
It must mean correct by Computer testing with some (correct) Human reasoning added
If so, HC+ is the label we can use with many other retros, where human reasoning rules out a castling, etc. (2018-11-10)
Michel Caillaud: Full Computer testing (C+) is possible with Natch 3.2 and some time (86 hours) (2020-03-02)
comment
Keywords: Bahnung, Räumung, Unique Proof Game, Castling
Genre: Retro
FEN: 2krbKr1/ppp1n1pp/2pb3n/8/1B6/NP6/P2PPPPP/2R2BNR
Reprints: 128 Shortest Proof Games 11/1991
H23 FIDE Album 1986-1988 1995
Input: Gerd Wilts, 1995-06-03
Last update: Alfred Pfeiffer, 2014-11-06 more...
45 - P0002318
Andriy Frolkin
The Problemist 1989
3. Preis
P0002318
(31+0) C+
Färbe die Steine!
BP in 17,5
1. e4 c5 2. Dg4 Da5 3. De6 fxe6 4. Ke2 Kf7 5. Kf3 Kf6 6. Kg4 Ke5 7. Kg5 h5 8. Kg6 Kf4 9. Kf7 Sh6+ 10. Ke8 Sf7 11. Lb5 Th6 12. d3+ Dd2 13. g4 a5 14. Sh3+ Kf3 15. g5 Ke2 16. Sg1+ Ke1 17. h3 Dd1 18. Sf3++
play all play one stop play next play all
Henrik Juel: The capture was fxDe
If White made it, Dd1 is white and so is Ke1, but he would stand in an illegal check from sPf2
So Dd1 and Ke1 are black (and Ke8 is white), and the rest of the men have a 'natural' color because of the shortish proof game, which is
C+ by Natch 3.1 (2 sec.) (2018-12-08)
Michel Caillaud: HC+ Jacobi 0.7.1 RC1 with constraints Ke8-e1 Qd8-d1 (3 hours)
Constraints applied in Jacobi are traducing Henrik's analysis.
The problem is not C+ (that would be with solving without constraints). (2019-12-26)
Olaf Jenkner: If Henrik's proof is right the problem may be considered C+. (2019-12-27)
A.Buchanan: But Natch couldn’t have coloured the pieces, while Jacobi not only does that, but allows us to keep track of exactly what assumptions (constraints) we make. Effectively the definition of “C+” is being shifted. The computational overhead of proving these constraints from first principles is huge. Mario’s solution, of describing such a problem as HC+, which specific detailing of the constraints, is the right way forward. We have got the computer test field to describe the situation, but as far as the cplus flag is concerned, it must remain false until it permits a third value maybe (2019-12-27)
comment
Keywords: Unique Proof Game, Coloring problem
Genre: Retro
Computer test: Natch 3.1 (2 sec.)
FEN: RNB1KB2/1P1PPNP1/4P2R/PBP3PP/4P3/3P1N1P/PPP2P2/RNBQK2R
Reprints: 155 Shortest Proof Games 11/1991
feenschach 137 08-09/2000
Input: Gerd Wilts, 1995-06-03
Last update: Alfred Pfeiffer, 2018-12-13 more...
46 - P0002321
Samuel Loyd
Le Sphinx 1866
P0002321
(16+16)
Welches ist die kürzeste Partie, die mit Patt endet?
1. e3 a5 2. Dh5 Ta6 3. Dxa5 h5 4. Dxc7 Tah6 5. h4 f6 6. Dxd7+ Kf7 7. Dxb7 Dd3 8. Dxb8 Dh7 9. Dxc8 Kg6 10. De6=
play all play one stop play next play all
Die (Loydsche) englische Version der Forderung zielt nicht auf Eindeutigkeit ab: "Find how a stalemate might result in ten moves."

in 'Ruy Lopez' abgedruckt in der Rubrik "Partidas de fantasia"
AB: Not quite unique alas. 4 Dxc7 & 5 h4 can be transposed. (2001-10-17)
Kostas Prentos: Besides the minor transposition, there's another totally different solution:
1.c4 d5 2.Db3 Lf5 3.Dxb7 h5 4.Dxa7 Lh7 5.Dxb8 Ta6 6.h4 Th6 7.Dxc7 f6 8.Dxd8+ Kf7 9.Dxd5+ Kg6 10.De6= with many duals, too (2002-07-03)
AB: Yes, I was referring to uniqueness of proof game to reach the diagram position. KP responds to the task which appears here as the stipulation. (2002-07-07)
Yoav Ben-Zvi: What is the most simple stipulation that makes the solution unique?

My candidate: "Shortest game ending in Stalemate, given that White has not moved a Pawn after his fourth move"

I would add the length of the composer's solution as a courtesy to solvers: "Game in less than 10.0 moves ending in Stalemate, given that White has not moved a Pawn after his fourth move" (2012-08-27)
A.Buchanan: Hi YBZ: the proof game that Kostas gave 5bnr/4p1pb/4Qpkr/7p/7P/2P5/PP1PPPP1/RNB1KBNR has 12 solutions. 1.c3 gives another 12 solutions. And there's 2 solutions for Loyd. Out of these 26 indeed only one has the property that Wh gets all pawn moves out of the way before 4th move. But it's just occurred to me that there's a variant of Loyd which begins 1.c3 and wQ develops via a4 & a5, ending with 5bnr/4p1pq/4Qpkr/7p/7P/2P5/PP1PPPP1/RNB1KBNR this has 15 solutions, and in 6 of these, Wh plays both pawn moves as moves 1 or 2. Similarly if 1.c4. This only differs from Prentos' solution in the occupant of h7. So the suggested stipulation alas wouldn't work. I am pretty sure i have seen a longer version which is sound as a PG. (2020-05-28)
A.Buchanan: See P1004131 for a longer sound PG. (2020-05-28)
Yoav Ben-Zvi: The cook noted above means that a more elaborate secondary condition is needed. My suggestion:
"PG that is shortest to end in Stalemate (less than 10.0 moves) and White plays 2 consecutive captures that are each longer than 2 squares".
An alternative is to accept the transposition:
"PG that is shortest to end in stalemate (less than 10.0 moves) and wPc2 does not move, 2 variants". (2020-06-07)
more ...
comment
Keywords: Construction task, Non-Unique Proof Game
Genre: Retro
FEN: rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR
Reprints: American Chess Journal , p. 18, 15/06/1876
335 Chess Strategy (Loyd) , p. 174, 1878
Ruy Lopez 3 03/1897
61-IV Sam Loyd and his Chess Problems , p. 58, 1913
61/IV Sam Loyd und seine Schachaufgaben 1926
132 Ultimate Themes 1938
6-5 De Waag 03/10/1941
R424 feenschach 21 04/1974
162 Shortest Proof Games 11/1991
Best Problems 45 2008
Input: Gerd Wilts, 1995-06-03
Last update: A.Buchanan, 2020-05-28 more...
47 - P0002345
Harry Goldsteen
diagrammes 1989
nach A. Frolkin
Super Preis
P0002345
(4+14)
#1
R: 1. ... Sh7-f8+ 2. Le8xTf7 Tf8xSf7 3. Se5-f7 Tf7-f8+ 4. Sc4-e5 Tf8xSf7 5. Sh6-f7 Tf7-f8+ 6. Sa3-c4 Tf8xSf7 7. Sg5-f7 Tf7-f8+ 8. Sb5-a3 Tf8xSf7 9. Se5-f7 Tf7-f8+ 10. Sc7-b5 Tf8xSf7 11. Sb5xDc7 Dc8-c7 12. Dd8-d7 Dc7xSc8 13. Ld7-e8 Te8-f8 14. Sf5-h6 Tf8-e8 15. Sh6-f7 Tf7-f8+ 16. Df8-d8 Dd8-c7 17. Le8-d7 Kc7-b8 18. Sa3-b5+ Lb8-a7 19. Sa7-c8 Kc8-c7 20. Sb5-a7+ Lc7-b8
play all play one stop play next play all
"Super-F"
Originalquelle=PB
Henrik Juel: (Please try to solve this wonderful problem yourself; if you need a hint, White
made four S-promotions). 1.exf8QR#. -1.. Sh7 -2.Be8:R Rf8:S -3.Se5 Rf7 -4.Sc4 Rf8:S -5.Sh6 Rf7 -6.Sa3 Rf8:S -7.Sg5 Rf7 -8.Sb5 Rf8:S -9.Se5 Rf7 -10.Sc7 Rf8:S -11.Sb5:Q Qc8 -12.Qd8 Qc7:S -13.Bd7 Re8 -14.Sf5 Rf8 -15.7Sh6 Rf7 -16.Qf8 Qd8 -17.Be8 Kc7 -18.Sa3 Bb8 -19.Sa7 Kc8 -20.7Sb5 Bc7 etc. Earlier in the game Black captured a7xPb6, c6xRd5, d7xRc6, e7xBd6, h7xPg6, and White promoted on a8, c8, d8, h8. The Keyword designation 'Whose move?' should be deleted. (2003-08-26)
Hans-Jürgen Manthey: eine mögliche Rückführung (sehr schwer) :
R: 1. ... Sh7-f8+ 2. Le8xTf7 Tf8xSf7 3. Se5-f7 Tf7-f8+ 4. Sc4-e5 Tf8xSf7 5. Sh6-f7 Tf7-f8+ 6. Sa3-c4 Tf8xSf7 7. Sg5-f7 Tf7-f8+ 8. Sb5-a3 Tf8xSf7 9. Se5-f7 Tf7-f8+ 10. Sc7-b5 Tf8xSf7 11. Sb5xDc7 Dc8-c7 12. Dd8-d7 Dc7xSc8+ 13. Ld7-e8 Te8-f8 14. Sf5-h6 Tf8-e8 15. Sh6-f7 Tf7-f8+ 16. Df8-d8 Dd8-c7 17. Le8-d7 Kc7-b8 18. Sa3-b5+ Lb8-a7 19. Sa7-c8 Kc8-c7 20. Sb5-a7+ Lc7-b8 21. Sd4-b5 Kb8-c8 22. Sc4-e5 Ka7-b8 23. Ld7-e8 Db8-d8 24. Dc8-f8 Ka6-a7 25. Le8-d7 Da7-b8 26. Kd7-e6 Ld8-c7 27. e6-e7 Le7-d8+ 28. e5-e6 Tf8-f7 29. Lf7-e8 Te8-f8 30. e4-e5 Lf8-e7 31. Ke6-d7 e7xLd6+ 32. Lf4-d6 Td8-e8 33. Dd7-c8 Te8-d8 34.Sd6-f5 Td8-e8 35. Sc8-d6 Te8-d8 36. c7-c8=S Tb8-e8 37. De8-d7 Tc8-b8 38. Kd7-e6 Tb8-c8 39. Se6-d4 Tc8-b8 40. Sd8-e6 Tb8-c8 41. Ke6-d7 Tc8-b8 42. d7-d7=S Tb8-c8 43. d6-d7 Tc8-b8 44. Kd7-e6 Tb8-c8 45. Le6-f7 Tc8-b8 46. Lh3-e6 Tb8-c8 47. Dc8-e8 Lf7-g8 48. Sf3-g5 Sg5-h7 49. Lf1-h3 Sh3-g5 50. Ke6-d7 Le8-f7+ 51. Sf7-h6 Tg8-h8 52. Sh8-f7 Sf2-h3 53. h7-h8=S Sh3xf2 54. h6-h7 Th8-g8 55. Kf5-e6 h7xg6+ 56. Kg4-f5 Sg5-h3 57. Sg1-f3 Sf7-g5 58. Kf3-g4 Tg8-h8 59. Dg4-c8 Th8-g8 60. h5-h6 Ld7-e8 61. Ke2-f3 Lc8-d7 62. Sd2-c4 d7xTc6 63. Tc1-c6 Sh6-f7 64. c6-c7 Sc7-a8 65.Sb5-a3 Ka5-a6 66. Ke1-e2 Kb4-a5 67. c5-c6 Da5-a7 68. Dd1-g4 Sa6-c7 69. Sc7-b5 Sg8-h6 70. Sa8-c7 f7-f6 71. a7-a8=S Ta8-b8 72. Ta1-c1 Sb8-a6 73. a6-a7 a7xb6 74. c4-c5 c6xTd5 75. Td3-d5 Kc5-b4 76. b5-b6 Kb4-c5 77. Th3-d3 Da3-a5 78. Sb1-d2 Kc5-b4 79. Lc1-f4 Kb6-c5 80. d5-d6 Kc7-b6 81. Th1-h3 Dd6-a3 82. a5-a6 Kd8-c7 83. a4-a5 Dc7-d6 84. b4-b5 Ke8-d8 85. d4-d5 Dd8-c7 86. g5-g6 Dc7-d8 87. g4-g5 Dd8-c7 88. h4-h5 Dc7-d8 89. h2-h4 Dd8-c7 90. g2-g4 Dc7-d8 91. e2-e4 Dd8-c7 92. d2-d4 Dc7-d8 93. c2-c4 Dd8-c7 94. b2-b4 c7-c6 95. a2-a4 (2020-04-02)
Hans-Jürgen Manthey: 42.d7-d7=S muß natürlich d7-d8=S lauten. (2020-04-02)
comment
Keywords: Ceriani-Frolkin Theme (SSSS), Uncapture of pieces by pieces
Genre: Retro
FEN: nk3nbr/bp1QPBp1/1pppKpp1/3p4/8/8/8/8
Reprints: Probleemblad 1 01-02/1989
9 Die Schwalbe 146 04/1994
(8) diagrammes 15 07-09/1994
(20) diagrammes 15 07-09/1994
20 Shakhmatnaya Kompozitsiya 14 1996
feenschach 137 08-09/2000
(3) Quartz 18 10-12/2002
(13) Mat Plus Review 13-14 08/2010
Input: Gerd Wilts, 1995-06-03
Last update: Mario Richter, 2012-07-17 more...
48 - P0002593
Thierry Le Gleuher
2511 diagrammes 98 07-09/1991
1. Lob
P0002593
(16+5)
BP in 12,5
Einsteinschach
1. e3 h5 2. Dxh5 d5 3. Dxd5 Th5[=sL] 4. Dxb7 Ld1[=sS] 5. Dxc7 Lg4[=sS] 6. Dxa7 Dc7[=sT] 7. Dxb8+ Kd7 8. Dxf8 f5 9. Dxg7 Sf6[=sB] 10. Dxg4 Tg8[=sL] 11. Dxd1 f4 12. exf4[=wS] Kc8 13. Se2[=wB]
play all play one stop play next play all
paul: The first 11.5 moves tested by Jacobi (~19 hours) (2019-12-10)
comment
Keywords: Unique Proof Game, Einstein Chess, Homebase (W), Initial Game Array (W)
Genre: Retro, Fairies
FEN: 2k3b1/2r1p3/5p2/8/8/8/PPPPPPPP/RNBQKBNR
Input: Gerd Wilts, 1995-06-03
Last update: A.Buchanan, 2013-01-27 more...
49 - P0002893
Bernd Schwarzkopf
Problemkiste 08/1989
P0002893
(4+5)
Welches war der letzte Zug?
wDL,sDL=Elch
R: 1. a7-a8=EL
play all play one stop play next play all
Henrik Juel: No EL could have made the last move, because of no hurdles
On b7/b8 sK would be in an illegal check from ELa4/c5
On e7,f8 wK would be in an illegal check from ELh5 (2020-05-19)
more ...
comment
Keywords: Last Move?, Type A, Promotion in the retro play
Pieces: dl = Moose (EL)
Genre: Retro, Fairies
FEN: *3Q1k1K3/2p2p2/*3q7/2*3Q4*3q/*3Q7/8/8/8
Reprints: 1419 Umwandlungen in Märchenfiguren 2 1993
Input: Gerd Wilts, 1995-06-03
Last update: Alfred Pfeiffer, 2020-05-20 more...
50 - P0002894
Bernd Schwarzkopf
v Problemkiste 08/1989
P0002894
(2+3)
Welches war der letzte Zug?
wDL,sDL=Elch
R: 1. a7-a8=EL
play all play one stop play next play all
Henrik Juel: Why could last move not be, say, Kd7-c8?
I suspect this is a Type B problem (2020-05-21)
more ...
comment
Keywords: Last Move?, Promotion in the retro play, Type B
Pieces: dl = Moose (EL)
Genre: Retro, Fairies
FEN: *3Q1k4K/6p1/8/4*3q3/8/8/8/8
Reprints: 1420 Umwandlungen in Märchenfiguren 2 1993
Input: Gerd Wilts, 1995-06-03
Last update: A.Buchanan, 2020-05-21 more...
51 - P0002897
Bernd Schwarzkopf
Problemkiste 08/1989
P0002897
(3+2)
Welches war der letzte Zug?
wSR=Spatz
R: 1. a7-a8=SP
play all play one stop play next play all
Henrik Juel: sKb6 stands in double-check from SPa8 (2020-05-21)
more ...
comment
Keywords: Last Move?, Type C, Promotion in the retro play
Pieces: sr = Sparrow (SP)
Genre: Retro, Fairies
FEN: *1N1K5/8/1k*1N5/p7/8/8/8/8
Reprints: 1423 Umwandlungen in Märchenfiguren 2 1993
Input: Gerd Wilts, 1995-06-03
Last update: Alfred Pfeiffer, 2020-05-20 more...
52 - P0002903
Bernd Schwarzkopf
Problemkiste 06/1990
P0002903
(2+3)
Welches war der letzte Zug?
Umwandlung nur
b) wTUa8 statt wTLa8
c) wTRa8 statt wTLa8
wTL=Adler
wTU=Spatz
wTR=Hamster
a) R: 1. a7-a8=AD
b) R: 1. a7-a8=SP
c) R: 1. a7-a8=HA
play all play one stop play next play all
Henrik Juel: I suspect that this is a Type B problem
What is the significance of 'Umwandlung nur'?
If it is a condition saying that last move was a promotion, the T and S are unnecessary (2020-05-21)
more ...
comment
Keywords: Last Move?, Type A, Promotion in the retro play, Aristocrat
Pieces: tl = Eagle (AD), tu = Sparrow (SP), tr = Hamster (HA)
Genre: Retro, Fairies
FEN: *3R1k1K3/5r2/6n1/8/8/8/8/8
Reprints: 1429 Umwandlungen in Märchenfiguren 2 1993
Input: Gerd Wilts, 1995-06-03
Last update: Alfred Pfeiffer, 2020-05-20 more...
53 - P0003113
Manfred Zucker
3223 Schach 07/1959
2. ehrende Erwähnung
P0003113
(3+8) C+
h#3
1. fxg3ep Sxe2 2. Tc4 Sg1 3. Tg4 Sxf3#
play all play one stop play next play all
more ...
comment
Keywords: En passant as key
Genre: h#, Retro
Computer test: M. Schreckenbach: Gustav 4.1 d
FEN: 8/8/8/7p/5pPk/2r2p1q/4p2p/6NK
Reprints: 3223 Schach 08/1959
346 Ausgewählte Schachaufgaben [Zucker] , p. 162, 1989
Input: Gerd Wilts, 1995-06-03
Last update: Olaf Jenkner, 2020-06-04 more...
54 - P0003183
Paul Vatarescu
2085 Revista Romana de Sah 12/1966
P0003183
(13+13)
h#2
1. gxf3ep gf3+ 2. Kf4 Tg4#
play all play one stop play next play all
AB: I think this is cooked.
1. Rd3 cxd3+ 2. Kd4 Rxc4# and 1. Rf3 cxf3 2. Kf4 Rxg4#.
Also, I cannot immediately see why last move could not have been 0...gxf4. (2002-03-21)
Hans-Jürgen Manthey: 3 Lösungen
I) 1.gxf3ep+ gxf3+ 2.Kf4 Tg4#
II) 1.Tf3 gxf3+ 2.Kxf4 Txg4#
III) 1.Td3 cxd3+ 2.Kxd4 Txc4#
die vermeintliche Lösung cxd3ep ist nicht möglich, da der letzte Zug d4 daran scheitert, da Weiß 3x schlagen muß und der Lc1 eingesschlossen ist. (2020-03-24)
comment
Keywords: En passant as key
Genre: h#, Retro
FEN: N7/2pq1p2/1pp1B3/3P1P2/2pPkPp1/P3p3/1PP1K1P1/1bRr1rRn
Input: Gerd Wilts, 1995-06-03
55 - P0003789
Zvonimir Hernitz
Problem 41-44 03/1957
1. ehrende Erwähnung e.a.
15. Thematurnier
P0003789
(3+13) C+
h#3
1. ... exd7 2. Tfe7 d8=T 3. Te6 Tf8#
1. Sc7? e7 Se6 e8=S# (but Wh to move)
play all play one stop play next play all
Autor Zvonko Hernitz, Zagreb
A.Buchanan: So what's the tourney theme exactly? Is it just the wonderful Art.15, the "official joke". There is a unique h#2 retro try: is that a requirement of this tourney? (2020-05-10)
A.Buchanan: What is the point of sBc4d3 & sLh4? They seem to add nothing (2020-05-10)
Henrik Juel: You can find the award here, Andrew
http://problem64.beda.cz/silo/problem_41-44_1957.pdf
on p.79
My Serbo-Croatian is a bit rusty, so I will leave the translation to you (2020-05-10)
A.Buchanan: ok ill have a go (2020-05-10)
more ...
comment
Keywords: Promotion (T), No legal last move for White, under-promotion
Genre: h#, Retro
Computer test: Henrik Juel: C+ by Popeye 4.61 (2020-05-10)
FEN: 8/3p1rp1/3PPk2/2pnrbpK/2p1q2b/3p4/8/8
Input: Gerd Wilts, 1995-06-03
Last update: A.Buchanan, 2020-05-10 more...
56 - P0003790
Zvonimir Hernitz
Problem 41-44 03/1957
1. ehrende Erwähnung e.a.
15. Thematurnier
P0003790
(4+11) C+
h#3
1. ... f3 2. De4 fxe4 3. Lf3 e3#
1. Lf3? e4 2. De3+ fxe3# (but Wh to move)
play all play one stop play next play all
Autor Zvonko Hernitz, Zagreb
A.Buchanan: Unique retro try h#2 (2020-05-10)
more ...
comment
Keywords: No legal last move for White
Genre: h#, Retro
Computer test: Henrik Juel: C+ by Popeye 4.61 (2020-05-10)
FEN: 8/8/8/4b1p1/1p1q1kr1/3P2n1/2pKPPb1/2r1n3
Input: Gerd Wilts, 1995-06-03
Last update: A.Buchanan, 2020-05-10 more...
57 - P0003792
Vojko Bartolovic
Problem 41-44 03/1957
2. ehrende Erwähnung
15. Thematurnier
P0003792
(6+3) C+
h#5
1. ... Kxa2 2. Kc2 Ka1 3. Kb3 c4 4. Ka4 Ka2 5. a5 b3#
play all play one stop play next play all
Autor Vojko Bartolović, Zagreb
Henrik Juel: C+ by Popeye 4.61
Last move was not c2-c3 (preventing sKd2 from exiting), so it is White to move, and the stipulation is really h#4.5 (2020-05-10)
A.Buchanan: There are various retro tries h#5, but none unique and none shorter (2020-05-10)
comment
Keywords: No legal last move for White
Genre: h#, Retro
Computer test: Popeye 4.61
FEN: 8/p7/8/8/8/P1P5/rP1k1PP1/1K6
Input: Gerd Wilts, 1995-06-03
Last update: James Malcom, 2020-05-10 more...
58 - P0004050
Andriy Frolkin
1940v diagrammes 86 07-09/1988
P0004050
(27+0) cooked
BP in 15,0
Färbe die Steine!
1. Sf3 d5 2. Se5 d4 3. Sc6 Dd5 4. Sxb8 Db3 5. cxb3 f6 6. Dc2 Kf7 7. Dg6+ hxg6 8. Kd1 Th3 9. Kc2 Tf3 10. gxf3 Ke6 11. Lh3+ Ke5 12. Lxc8 e6 13. Kd3 Le7 14. Kc4 Ld8 15. Kb4 Se7
play all play one stop play next play all
Cook: 4. Sd8 Db3 5. cxb3 Kd7 6. Dc2 Kd6 7. Dg6+ hxg6 8. Kd1 Th3 9. Kc2 Tf3 10. gxf3 Ke5 11. Lh3 f6 12. Lxc8 e6 13. Kd3 Le7 14. Kc4 Lxd8 15. Kb4 Se7
For author's correction, see P1371422
Michel Caillaud: Position is wrong. Pd5 should be on d4 with AL 1..d5 2..d4 (otherwise 3..Dd5 is impossible) and 14.Kc4
Given NL is not one.
Cooked by Jacobi 0.7 RC1 :
4.Sd8 Db3 5.cxb3 Kd7 6.Dc2 Kd6 7.Dg6+ hxg6 8.Kd1 Th3 9.Kc2 Tf3 10.gxf3 Ke5 11.Lh3 f6 12.Lxç8 e6 13.Kd3 Le7 14.Kc4 Lxd8 15.Kb4 Se7 (2019-12-21)
François Labelle: Andrew, the author's solution is still missing the correction 14.Kc4, and also 15... Se7. The cook was actually found by Jacobi 0.7.1 RC1. (2019-12-22)
Henrik Juel: From the comments it seems that the problem is cooked:
The author solution works, ending with a white Sb8
But Michel's cook also works, ending with a black Sb8
It seems that Jacobi found both solution and cook
This genre is very difficult, mixing proof game and coloring; I prefer the pure coloring problems, where there is a unique way to color the men, and if there is something else, like #1 or PG in 15, this is just an added attraction (2019-12-22)
A.Buchanan: Ok sorry but it was not made clear that there was a diagram error AND a cook once the diagram was corrected. I was doing other stuff so just tried to respond to the request without delving into
details. I thought the cook was what had exposed the diagram error, as is more common, hence it would be uninteresting to record it for posterity heh. I have set things up correctly now, I hope, and informed Andrey, though maybe others have too (2019-12-22)
A.Buchanan: By the way, Die Schwalbe thinking is to have an editor’s guide. I think the *first* standalone part which needs to be written is the map of the Heart of Darkness in PDB: the interaction between animation, stipulation & diagrams. (2019-12-22)
François Labelle: Andrey Frolkin corrected the problem with the change 13...Lc5 14.Kc4 Se7 15.Kb5 a6+ (C+ Jacobi 0.7.1 in 9h). He asked me to publish the correction here on PDB, given that the original problem was published so long ago in a magazine that no longer exists. (2020-01-03)
A.Buchanan: Correction published as P1371422. (2020-01-05)
more ...
comment
Keywords: Unique Proof Game, Coloring problem, Superseded by (P1371422)
Genre: Retro
FEN: RNBB4/PPP1N1P1/4PPP1/4K3/1K1P4/1P3P2/PP1PPP1P/RNB4R
Input: Gerd Wilts, 1995-06-03
Last update: A.Buchanan, 2020-01-05 more...
59 - P0004069
Andriy Frolkin
2121 diagrammes 90 07-09/1989
P0004069
(10+0) C+
Bestimme die Steine A, B, C, D und E so, daß eine BP in 13,0 Zügen möglich ist!
1. b4 a5 2. Lb2 axb4 3. Lxg7 Txa2 4. Lxf8 Txc2 5. Dxc2 Kxf8 6. Dxh7 Txh7 7. Ta8 Txh2 8. Txb8 Txh1 9. Txb7 Txg1 10. Txc7 Txg2 11. Txd7 Txf2 12. Txe7 Dxd2+ 13. Kxd2 Txe2+
play all play one stop play next play all
A: wKd2,sKf8; B: wTe7,sTe2; C: sBc4f7; D: wSb1,sSg8; E: wLe1,sLc8
Als Ko-Autor wurde bei der Veröffentlichung fälschlicherweise A. Kornilow angegeben, der aber nie beim Komponieren mitgewirkt hat.
A.Buchanan: Have gone through all the Letter Problems and hopefully have rekeyed all those which are Rebuses correctly. Now if I create a Rebus, how do I get the diagram on as on the left here? I suspect that only Gerd can do it. (2019-12-29)
Henrik Juel: I do not know the answer to your question, Andrew
But I have one myself:
How was this problem tested to achieve a C+ label? (2019-12-29)
A.Buchanan: I've no idea Henrik (2019-12-30)
more ...
comment
Keywords: Unique Proof Game, Massacre PG, Rebus
Genre: Retro
FEN: 2*1Q2*2PQ1/4P*3N2/8/8/1*3N6/8/3*2PP3/1Q3*1Q2
Input: Gerd Wilts, 1995-06-03
Last update: Gunter Jordan, 2020-07-01 more...
60 - P0004088
Niels Høeg
The Chess Amateur 1923
P0004088
(9+15)
Weiß 1 Zug zurück, dann #1
R: 1. Th8-d8, dann 1. Dd1#
play all play one stop play next play all
Ksl5/lttb1bb1/Tbb3B1/db6/k5b1/b7/BBBBB3/T1L5 (10+15)
This intermediate position was reached after white captured fxSe and promoted on e8 and h8, while black captured a7xb6 (not a6xb5 which cannot explain the north-west cage), e7xd6xc5xb4xa3, and h5xLg4.
The problem position is reached by:
1.b4 f6 2.Lb2 f5 3.Th1 f4 4.Th8 f3 5.Lf6 f2 6.Lg5 g3 7.Lh6 gxh6 8.g7 h5 9.g8=D h4 10.Dd5 h3 11.Dh1 h2 12.c3 g2 13.Td8
Other similar arrangements with one white and three black pawns on the f-, g-, and h-files are either illegal or cannot lead to the problem position.
Henrik Juel: A complete solution involves attempting the four possible retroplays where White unpromotes wDh1 and Black uncaptures [wLc1], leaving room for two more white unpromotions (and one uncapture by a wP)
-1.Tf8?? f3 -2.Db1 f4 -3.Dg6 h3 -4.Dg8 h4 -5.g7-g8=D h5 -6.g6 h6 -7.g5 h7 -8.g4 g5xLf4 -9.Le5 g6 -10.Tf1; far too slow
-1.Tg8? g3 -2.Df3 g4 -3.Df8 g5 -4.f7-f8=D f3 -5.f6 h3 -6.f5 f6xLg5 -7.c2 f7 -8.Lf6 h4 -9.Tg1 h5 -10.Ta1 h6 -11.Lb2 h7 -12.Lc1; one tempo too slow
-1.Tg8? g3 -2.Da1 g4 -3.c2 g5 -4.Dh8 h3 -5.h7-h8=D f3 -6.h6 f4 -7.h5 h6xLg5 -8.Lf6 f5 -9.Lb2 f6 -10.Tg1 f7 -11.Ta1 h7 -12.Lc1; one tempo too slow
-1.Th8 g3 -2.Dd5 h3 -3.Dg8 h4 -4.g7-g8=D h5 -5.g6 h6 -6.c2 g7xLh6 -7.Lg5 g4 -8.Lf6 f3 -9.Th1 f4 -10.Ta1 f5 -11.Lb2 f6 -12.Lc1 f7 -12.b2 Kb4 etc.; solution (2019-11-19)
comment
Keywords: Help retractor
Genre: Retro
FEN: KnbR4/brrp4/Rpp5/qp6/kP6/p1P5/P2PPppp/7Q
Reprints: Thema Danicum 99 2000
Input: Gerd Wilts, 1995-06-03
Last update: Alfred Pfeiffer, 2019-11-21 more...
61 - P0004144
Karl Fabel
Die Welt 1949
P0004144
(10+1)
#1
b) Ta1 nach b1
a) 1. 0-0-0#
b) 1. ... Kxc2 2. Dd2#
play all play one stop play next play all
In 'Schachmaty (Riga)' nachgedruckt ohne Autorangabe innerhalb eines Artikels von A. Herbstman "Es lebe der Einzüger" (mit umgekehrter Zwillingsbildung)
Mario Richter: There seems to be a new feature "[recalculate solution]" not yet explained in the "What's new" section. What exactly does it do?

Regarding the keyword "Whose move?", I would like to replace it with "no legal last move for Black" - any protests? (2020-05-02)
James Malcom: It is done, Mario. (2020-05-02)
A.Buchanan: The animation requires set of steps which is computed based on the stipulation & solution when someone finishes an edit of the solution. If there is a change to the stipulation then the animation isn't automatically recomputed. Historically, this has required editing the solution and making at least a trivial change, e.g. blank character on the end, to force the animation to be recomputed. I guess the [recalculate solution] button does this automatically. I think it only needs to be present if the solution has got red marks in it. (2020-05-02)
A.Buchanan: I think we can downgrade Lc3 to B? (2020-05-02)
comment
Keywords: Castling (wg), No legal last move for Black, Rex solus
Genre: Retro
FEN: 8/8/8/8/1P1PRQ2/2Bk4/BPN5/R3K3
Reprints: (VIII) Problem 17-18 08/1952
Sahs/Shakhmaty (Riga) 4, p. 26, 02/1961
(IV) Problem 79-82 01/1962
Input: Gerd Wilts, 1995-06-03
Last update: A.Buchanan, 2020-05-02 more...
62 - P0004210
Denisson Nixon
9238 Die Schwalbe 243-244 11-12/1953
P0004210
(10+3)
25 freiwillige Schachgebote ohne Batterien

P1178644 (Karlström, 25, 10 Steine)
HBae: Originalquelle: The Fairy Chess Review, 02/1952, Seite 17. In der LB zu P1178644 enthalten. (2019-11-26)
comment
Keywords: Einzügerrekord (B1b3/oB)
Genre: Retro
FEN: 3Q4/1R6/R6B/4k3/3p1p2/2P1P1P1/1N5N/7K
Input: Gerd Wilts, 1995-06-03
Last update: HBae, 2010-11-25 more...
63 - P0004316
Samuel Loyd
American Chess-Nuts 1868
P0004316
(6+9) C+
s#1
1. 0-0-0 Db1#,Da1#,Tb1#,Txf2#,Te2#,Td2#,Tc2#,Txc4#,Se2#
play all play one stop play next play all
Frank Müller: Diese Stellung gibt es mit leichten Variationen:
1) mit wSg1 und sBg2 (nur 8 Mattzüge) = New York Illustrated News 10/03/1860
2) Wie nebenstehend mit sSg1
3) Mit sSg1 und sBg2 = 102 Nokkur skakdämi og tafflok 1901 (2011-05-04)
A.Buchanan: Fun puzzle but I don’t think it counts as retro. The point of the castling and e.p. conventions was to insulate orthodox compositions from retro concerns, although ironically they have been mainly co-opted by retro folk now. To jump the low bar which either of the two conventions requires is (unless there are other factors at play) no more retro reasons than to conclude that a player whose king is in check has the move. What do others think? (2020-01-05)
Henrik Juel: I agree, this should not have s#,retro as Genre (2020-01-05)
A.Buchanan: Thanks Henrik. This is not just an academic concern. There are conventions which trigger if a problem is retro, so firming the meaning of this word is helpful (2020-01-06)
comment
Keywords: Castling (wg)
Genre: s#
FEN: 8/8/1Q6/8/krR5/bp3p1p/qr3P1P/R3K1n1
Reprints: (XV) Problem 79-82 01/1962
Input: Gerd Wilts, 1995-06-03
Last update: A.Buchanan, 2020-01-06 more...
64 - P0004318
George Hume
Jamaica Gleaner 31/12/1892
Ehrende Erwähnung
P0004318
(7+7)
#1 oder s#1
1) R: 1. d4xe3ep, dann 1. d4xc3 Sd3#
2) R: 1. d4xe3ep, dann 1. Lh7xe4+ 2. Sd3+ Lxd3#
play all play one stop play next play all
Beide Könige sind im Schach. Schwarz ist aufgefordert, den illegalen Zug d4xe3ep zurück zu nehmen und statt dessen einen anderen legalen Zug unter Berücksichtigung von "berührt - geführt" auszuführen.
A.Buchanan: Any idea why we think that the last move was ep rather than e.g. Kf5-e5+(+)? Unlike some joke problems, there is no illegality associated with the ep itself. R: 1. d4xe3ep+(+)? e2-e4 2. Lg8-h7.
What exactly was the touch-move rule in 1892? Wikipedia says "The 1862 laws of the British Chess Association's Law VII provided instead that if a player made an illegal move, "he must, at the choice of the opponent, and according to the case, either move his own man legally, capture the man legally, or move any other man legally moveable." I guess if the third option were chosen (which doesn't apply here), then Black gets to specify which piece he moves, as long as it's not the one he touched, and as long as it doesn't capture the piece which was captured by the illegal move. Is that a fair interpretation?
But outside Britain (or the British Empire!) the earlier 1845 rule would apply, even as late as 1893 (e.g. Lindermann v Echtermeyer, at Kiel) "If a player make a false move, i.e., play a Piece or Pawn to any square to which it cannot legally be moved, his adversary has the choice of three penalties; viz., 1st, of compelling him to let the Piece or Pawn remain on the square to which he played it; 2nd, to move correctly to another square; 3rd, to replace the Piece or Pawn and move his King."
So if someone was in stalemate, they could play any illegal move, and then could perhaps argue that the only option available to the opponent is to let them make that illegal move! (New bad joke!)
The Wikipedia article is currently incomplete about when these older rules were superseded, but I have requested an update. (2019-10-21)
comment
Keywords: Illegal position, Touch Move, Retract illegal move (self-check), Joke, En passant
Genre: Retro
FEN: 3R4/7b/4np2/r3k3/1R3bP1/2B1p3/1P3N2/1K6
Reprints: 60 Changing Fashions 1925
(XVI) Problem 79-82 01/1962
Input: Gerd Wilts, 1995-06-03
Last update: A.Buchanan, 2019-10-21 more...
65 - P0004434
Johannes Manfred Wittlich
9643 The Fairy Chess Review 08/1953
P0004434
(10+10)
# in wieviel?
1. ... Ta8-d8 (completes "0-0-0") 2. a8=D,T#
play all play one stop play next play all
Henrik Juel: The counting of captures is no Joke
White captured [Lc8] on c8 and the remaining five missing black men by f2xe3x..xa7
Black captured c7xb6, e7xd6xc5, and gxf out on the board, where [Ta1,Th1] could not reach, so they were captured by f2xTe1 and f2xTg1, with the promotees then being captured by [Pf2] or now standing on e7,e4
All six missing white men were thusly captured by black pawns, including [Lc1], and the only possible retroplay is to retract (half of) black castling, so c7 is available for Kd6; incidentally, [Pa7] was captured at home by b6xPa7
The Joke part can be avoided by moving Ta8 to d8 and changing the stipulation to something like 'Last two single moves?' or 'Which men never moved?' (2018-01-10)
A.Buchanan: bPh7 can be removed, no? (2020-02-01)
Henrik Juel: Yes, it seems so (2020-02-01)
comment
Keywords: Finish or retract an unfinished move, Joke, Castling, Volet Pawn
Genre: Retro
FEN: r1k5/Pp1pn2p/1p1K4/2p1r3/4q3/1P6/P1PPP1PP/5B2
Reprints: 2716 FEENSCHACH 09-10/1955
(180) Problem 127-132 09/1969
Input: Gerd Wilts, 1995-06-03
Last update: Alfred Pfeiffer, 2020-02-11 more...
66 - P0004437
Albert F. Ivanov
Sowjetskaja Moldawija 1969
P0004437
(7+9)
+
Bernd Schwarzkopf: 1.g6? ... 2.g8D# aber Schwarz am Zug.
1.- hxg5+! 2.Kxg5 g1D 3.f8D+ (2020-01-23)
Henrik Juel: All captures were made by pawns, and White promoted [Pa2] on a8
Black has no last move, so he has the move
1... g1=D? 2.f8=D+ Kxh7 3.g6+ Kxg6 4.Df5# (2020-01-23)
comment

Genre: Retro
FEN: 7k/2pp1PpP/1p1p3p/3P2P1/6PK/5P1p/6p1/8
Reprints: (3) Problem 141-143 08/1971
Input: Gerd Wilts, 1995-06-03
67 - P0004492
Gerald Ettl
8598 Die Schwalbe 148 08/1994
P0004492
(13+14) cooked
Ist die Stellung legal?
R: 1. Th5-h6 a3-a2 2. Td5-h5 a4-a3 3. Td8-d5 a5-a4 4. Tb8-d8 a6-a5 5. b7-b8=T a7-a6 6. a6xDb7 Dd5-b7 7. a5-a6 Dg5-d5 8. a4-a5 Dd5xBg5 9. g4-g5 Dd8-d5 10. g3-g4 Dc8-d8 11. Kf4-f3
play all play one stop play next play all
Cook: R: 1. ... b7-b6 2. Th5-h6 Sb6-a8 3. Tb5-h5 Sc4-b6 4. Tb4-b5 Sd6-c4 5. Tb3-b4 Sf5-d6 6. Tb4-b3 Sg3-f5 7. Kf4-f3 a3-a2 8. Te1-e2 Lg4-d1 9. Tb3-b4 a4-a3 10. Ta3-b3 Lc8-g4 11. Ke5-f4 a5-a4 12. Kd4-e5 Sh5-g3 13. Te2-e1 Kg4-h3 14. Ta1-a3 Kg5-g4 15. h3-h4 Kf6-g5 16. Kd3-d4 Kg7-f6 17. Sf4-g2 Tg5-g1 18. Lg2-f1 Sf6-h5 19. Dd1-h1 Sd7-f6 20. Te1-e2 Sb8-d7 21. Ke2-d3 Td5-g5 22. Th1-e1 Td8-d5 23. Lf1-g2 Tg8-d8 24. Ke1-e2 f3-f2 25. Se2-f4 Le5-h2 26. Sg1-e2 Kf8-g7 27. e2-e3 Lg7-e5 28. e3-e4 e4xBf3 29. f2xDe3 Da3-e3 30. g2xTf3
NL R: 1. ... b7-b6 gefunden von Karsten Mueller, das weitere Retrospiel nur zur Illustration, daß sich so die Stellung tatsächlich auflösen läßt. G. Ettl hatte (ebenso wie z.B. Superlöser HHS) vermutlich übersehen, daß der wBg2 auch als Bauer geschlagen werden konnte, nachdem er selbst einmal auf die f-Linie schlug ...

Schwalbe: "Debüt von G. Ettl"
Löserkritik (Heft 152, April 1995): "Das ist nicht übel für einen Debütanten (HHS), aber die Forderung zu anspruchslos (MS)."
Gerald: Habe schon 3 Verbesserungen gemacht! Sleepers awake! Cantata no.140 Bach. Was soll ich also sagen? Die NL kam uebrigens damals von Karsten Mueller. (2003-10-24)
Hans-Jürgen Manthey: die Stellung ist Legal warum cooked ?? zB
R: 1. b7-b6 Ta5-a6 2. Sb6-a8 Tb5-h5 3. Sc4-b6 Tb4-b5 4. Sd6-c4 Tb3-b4 5. Sf5-d6 Kf4-f3 6. Sg3-f5+ Ke5-f4 7. a3-a2 Kd4-e5 8. a4-a3 Kc3-d4 9. Sf5-g3 Te1-e2 10. Kg4-h3 La6-f1 11. Kh5-g4 Ta3-b3 12. Sd4-f5 Tf1-e1 13. Ld6-h2 Se1-g2 14. Tg5-g1 f3xDe4 15. Dg4-e4 g2xTf3 16. Tf6-f3 Ta1-a3 17. La3-d6 Dh3-h1 18. Ld6xa3 a2-a3 19. Dc8-g4 Th1-f1 20. Ta5-g5 Sf3-e1 21. Le5-d6 Sg1-f3 22. Tf6-d6 Lc4-a6 23. Lg4-d1 Df3-h3 24. Td8-d6 Kd3-c3 25. Sc6-d4 Ke2-d3 26. Tg8-d8 Kf1-e2 27. Dd8-c8 Dd1-f3 28. f3-f2 Kf2-f1 29. Lc8-g4 Lf1-c4 30. Lg7-e5 e2-e3 31. e4xBf3 Ke1-f2 32. d5xSe4 f2-f3 33. Lf8-g7 Sc3-e4 34. Kg4-h5 Sb1-c3 35. Th8-h5 Th2-h1 36. a5-a4 Th1-h2 37. a7-a5 Th2-h1 38. Sb8-c6 Th1-h2 39. Kf5-g4 Th2-h1 40. Ke6-f5 Th1-h2 41. Kd7-e6 Th2-h1 42. Ke8-d7 Th1-h2 43. d7-d5 Th2-h1 44. g7-g6 Th1-h2 45. Sg6-h8 Th3-h1 46. Se5-g6 Th2-h3 47. Sg4-e5 Th1-h2 48.Sh6-g4 Th2-h1 49. Th8-g8 Th1-h2 50. Sg8-h6 h2-h4 (2020-03-25)
Henrik Juel: Probably Gerald had intended another retroplay
Does anyone know the Schwalbe solution from 1994 or 1995? (2020-03-25)
more ...
comment

Genre: Retro
FEN: n6n/2p1pp1p/1p4pR/8/4P2P/4PK1k/pPPPRpNb/2Bb1BrQ
Input: Gerd Wilts, 1995-06-03
Last update: Mario Richter, 2020-03-26 more...
68 - P0004587
Nikita M. Plaksin
(4) Problem 188-193 05/1979
P0004587
(12+16)
#1 (wer?)
1. ... Sxd2#
1. ... Sg3 Matt oder Remis?

Beispielauflösung mit Schwarz am Zug (mri):
R: 1. Ta7-a6 Tb1-c1 2. Ta6-a7 Dc1-d1 3. Ta7-a6 Td1-e1 4. Ta6-a7 Ke1-f2 5. Kg1-h1 Sg3-f1 6. Kh1-g1 Se4-g3 7. Kg1-h1 Sg5-e4 8. Kh1-g1 Sh3-g5 9. Ta7-a6 Sg1-h3 10. Ta6-a7 Kf2-e1 11. Ta7-a6 Tf1-d1 12. Ta6-a7 Ke1-f2 13. Ta7-a6 Tf3-f1 14. Tb7-a7 Kf1-e1 15. Ta7-b7 De1-c1 16. Ta6-a7 Dh4-e1 17. Ta7-a6 Th3-f3 18. Ta6-a7 Kf2-f1 19. Ta7-a6 Tf1-b1 20. Ta6-a7 Ke1-f2 21. Ta7-a6 Tf3-f1 22. Ta6-a7 Tg3-f3 23. Ta7-a6 Kf2-e1 24. Tb1-b2 Sf3-g1 25. Tg1-b1 Df6-h4 26. Ta6-a7 Db2-f6 27. Ta7-a6 Dc1-b2 28. Ta6-a7 Df1-c1 29. Ta7-a6 Ke1-f2 30. Ta6-a7 Kd1-e1 31. Ta7-a6 Kc1-d1 32. Ta6-a7 Kb2-c1 33. Ta7-a6 Ka3-b2 34. Ta6-a7 Kb4-a3 35. Ta7-a6 Kc5-b4 36. Ta6-a7 Kc6-c5 37. Ta7-a6 Sh4-f3 38. Ta6-a7 Df3-f1 39. Tb1-g1 Kb7-c6 40. Tc1-b1 Kc8-b7 41. Tb1-c1 Kd8-c8 42. Tc1-b1 Ke8-d8 43. Tb1-c1 Db7-f3 44. Ta7-a6 Dc8-b7 45. Ta6-a7 Dd8-c8 46. Ta7-a6 Lh7-g8 47. Ta6-a7 Le4-h7 48. Ta7-a6 Lb7-e4 49. Ta6-a7 Lc8-b7 50. Ta7-a6 b7-b6
play all play one stop play next play all
Mario Richter: Das Diagramm ist offensichtlich verdruckt (s. sBBa5a6b7c7). Wie lautet die korrekte Stellung? (2010-01-23)
TBr: Habe die Stellung korrigiert laut Problem 188-189. (2020-03-13)
Henrik Juel: Thanks, Thomas
Black captured [Lf1] on f1 and hxgxfxe
Retracting e4-e3 is illegal as [Ph7] captured [Lc1] on a dark square
Outline of retroplay:
Retract -1.Ta7-a6, sTDT to the left, sKe1-f2, wKg1-h1, sSg3-f1, wKh1-g1, sSg3 to g1, extract sTDT via f1 and f3, sSh3-g1, wTb2 to g1, sD to f1, sKf2 to e8, sDf1 to d8, sLg8 to c8, and finally probably -50... b7-b6 to avoid draw by the 50 move rule (2020-03-13)
Mario Richter: Henrik, I don't think that "-50... b7-b6 to avoid draw by the 50 move rule" is the point of this problem. I think the author's intention was to raise the question what has higher priority: 50-moves-rule or checkmate.
So 1. ... Sxd2 mates, the question is, if the non-capturing non-pawn move 1. ... Sd2 too is checkmate.
Furthermore, I do not like the stipulation: White has no mating move, so the question "#1 (wer?)" doesn't make any sense to me. Imho a better stipulation would be "#1, How many solutions?" (2020-03-26)
Henrik Juel: Thanks for providing a retroplay, Mario
You are probably right about the author intention; I think that Plaksin would argue that 1... Sg3 stops the game immediately, with draw by the 50 move rule
The stipulation may have been translated incorrectly from serbo-kroatian (2020-03-27)
comment
Keywords: 50 move rule
Genre: Retro
FEN: n4bb1/2ppppp1/Rp6/p7/5P2/1P2p3/PRPPPkPP/N1rqrn1K
Input: Gerd Wilts, 1995-06-03
Last update: Mario Richter, 2020-03-26 more...
69 - P0004643
Branko Pavlovic
4217 Problem 194-197 12/1979
P0004643
(2+4) cooked
-1(w+s), dann h#1
R: 1. 0-0 Kb1xSa2, dann 1. bxa2 Kd2#
play all play one stop play next play all
Cook: NL
R: 1. Tf2-f1 b4xDa3, dann 1. Kb1 Dxb2#,Tf1#
R: 1. 0-0 c4xLb3, dann 1. Kb1 0-0#
(Mario Richter)
Adrian Storisteanu: Possible fix (I think): +wPa4, +bPc4 (3+5). (2020-01-31)
Gerald Ettl: Welche Funktion erfuellt der +bPc4 ? (2020-02-01)
Adrian Storisteanu: A bPc4 eliminates Mario's cook - 1.0-0 c4xBb3 & 1.Ka2-b1 0-0#. (2020-02-01)
Gerald Ettl: I overlooked Mario second cook. Thank you, Adrian (2020-02-01)
more ...
comment
Keywords: Help retractor, Castling in the retro play
Genre: Retro
FEN: 8/8/8/8/8/pp6/kp6/5RK1
Input: Gerd Wilts, 1995-06-03
Last update: Alfred Pfeiffer, 2020-02-10 more...
70 - P0004769
Franz Palatz
2794 Deutsche Schachblätter 02/1924
Allan White gewidmet
P0004769
(4+4)
Weiß nimmt 1 Zug zurück, dann #2
R: 1. Ka8xBb7!, dann 1. axb7
play all play one stop play next play all
Nach zurück Ka8xBb7 und nun 1. axb7! ist 0-0 illegal, da der sKe8 seinen weißen Kollegen hinter die Bauern gelassen haben muß.
paul: Actually, the solution is -1. Ka8xPb7 (not -1. Ka7xPb7? because after 1.axb7, Black has Be3+)
See P1092706 (2020-03-22)
Henrik Juel: After the retraction of Ka8xPb7, sKe8 must have moved to let in the wK, so Black cannot prevent the mate by castling (2020-03-22)
comment
Keywords: Help retractor, Castling
Genre: Retro
FEN: 4k2r/1Kp5/P3PP1b/8/8/8/8/8
Input: Gerd Wilts, 1995-06-03
Last update: Mario Richter, 2020-03-26 more...
71 - P0004845
Dmitri W. Pronkin
4833v Die Schwalbe 84 08/1984
1. Preis
P0004845
(14+1) C+
BP in 26,5
1. Sh3 g5 2. Sf4 gxf4 3. Sa3 f3 4. gxf3 Sf6 5. Lg2 Se4 6. fxe4 d5 7. exd5 Sc6 8. dxc6 Dd3 9. exd3 h5 10. Dg4 hxg4 11. cxb7 g3 12. hxg3 f5 13. Th2 f4 14. gxf4 e5 15. fxe5 Ld6 16. exd6 Th3 17. dxc7 Te3+ 18. fxe3 a5 19. Kf2 Ta6 20. Kg3 Tc6 21. Kh4 Tc3 22. dxc3 Le6 23. Ld2 Lb3 24. cxb3 a4 25. bxa4 Kf7 26. Ld5+ Kg6 27. Lf7+
play all play one stop play next play all
Henrik Juel: Mario, can your rawbats test this one? (2018-12-09)
Mario Richter: White pawns captured all missing black men, and we know exactly on which squares all these captures took place. So one testing idea would be to generate all possible mappings M: BLACK_PIECES -- CAPTURE_SQUARES and use these mappings as constraints for programs like 'jacobi' or 'rawbats'.
The main task is to find a subset M' of M which reduces the number of test cases from approx. 15! to a manageable size.
Can you provide some mathematical/logical insight how this might be done?! (Some observations that might be helpful are: Bishops could only have been captured on squares of their own color, Ph7 captured at least once and he or Pg7 either promoted or did the last remaining black capture,so most of the other black pawns never left their homefile, ...) (2018-12-10)
Henrik Juel: I have no further insights, Mario (2018-12-11)
Vladimir Rey: C+ Natch 3.2 (Resolution time: 43 mn 18.50 s.) (2020-04-12)
comment
Keywords: Unique Proof Game, Massacre PG, Rex solus (s)
Genre: Retro
Computer test: Natch 3.2
FEN: 8/1PP2B2/6k1/8/P6K/N1PPP3/PP1B3R/R7
Reprints: 118 Shortest Proof Games 11/1991
Input: Gerd Wilts, 1995-06-03
Last update: James Malcom, 2020-04-12 more...
72 - P0004872
Joseph Ney Babson
Das Geheimnis des schwarzen Königs , p. 219, 1960
P0004872
(14+8)
#0,5
klären: idee & form, Heft 62/April 1999 nennt auf Seite 1774 unter Nr. 4 als Autor Hans Klüver, 1923, Hamburger Nachrichten (VF)
Henrik Juel: Completing 0-0-0, axb6ep, or gxf6ep will mate Black
Black captured hxgxf, so [Pa7] did not capture
Not 0-0-0, because then [Pa7] could not have promoted, and the remaining seven missing black men cannot explain the eight white pawn captures
Not axb6ep, because then [Pa7] and [Lc8] would have been captured by officers, and the remaining six missing black men cannot explain the remaining seven white pawn captures
So White mates by removing Pf5, completing gxf6ep (the other white pawn captures are easily explained) (2020-06-05)
comment
Keywords: Finish or retract an unfinished move, Joke
Genre: Retro
FEN: 8/3p4/BPpPpPQ1/1pB1Pp2/1P4p1/1PNk1p2/1P4P1/R1K5
Reprints: XVII Die Schwalbe 8, p. 201, 04/1971
Input: Gerd Wilts, 1995-06-03
Last update: James Malcom, 2020-06-05 more...
73 - P0004941
Nikolai R. Burljajew
Shakhmaty v SSSR 1966
P0004941
(6+0)
Färbe die Steine!
Welches war der letzte Zug?
Schwarz: Kg7, Td7, La6, Bb4c3. R: 1. dxc3ep+ c2-c4 2. b5-b4+
play all play one stop play next play all
Henrik Juel: Whatever the coloring, both La6 and Td7 deliver check, so these two officers must have the same color, and they deliver a double check to one of the kings
The double check to Kb7 is clearly illegal, so it is to Kd3, and made with an en passant capture
The color of Pb4 is determined by the further retroplay (2020-06-11)
more ...
comment
Keywords: Coloring problem, En passant in the retro play, Last Move?
Genre: Retro
FEN: 8/1K1R4/B7/8/1P6/2PK4/8/8
Reprints: ? 1977
(2) Die Schwalbe 96 12/1985
(6) Die Schwalbe 144 12/1993
Input: Gerd Wilts, 1995-06-03
Last update: Rainer Staudte, 2020-06-10 more...
74 - P0004965
Pierre Drumare
Themes-64 1965
Spezial Preis
P0004965
(12+11)
#3
Schwarz zog soeben f2-f1 und hat noch die Wahl der Umwandlung
a) (f1=D) 1. fxg8=D Dxf4 2. Dgxg5 Dxg5 3. Dxg5#
b) (f1=T) 1. fxg8=T Txf4 2. Txg5 Txf5+,Txe4,Tf3,Tg4 3. Txf5,Txg3,Txg3,Txg4#
c) (f1=L) 1. fxg8=L g4 2. Lc4 Kxe4 3. De6#
d) (f1=S) 1. fxg8=S Sh2 2. Se7,Sf6 ... 3. Sd5#
play all play one stop play next play all
Ein, wie man sieht, noch recht holpriger Versuch (Duale) mit Tricks (sBf1!) den Babson im direkten ortho Matt zu bewerkstelligen. \eb

Zitat aus ND6:
Over de duals in de dame- en de paardvariant schreef Drumare: "De Babson-task is dermate spectaculair dat dit kleine gebrek von secundair belang is".
Erich Bartel: Nachdrucke:
1) II Die Schwalbe (10-11) X-XI 1968,S.142
2) Die Schwalbe (15/16) III-IV 1969, S.243
3) 4 varianter med 1 bonde,1972
4) Probleemblad V-VI 1983,S.65
5) 6 Caissas Schloßbewohner 1983
6) 13 De man die de Babson task wilde maken 1987
7) Themes-64 (69) III 1973
8) P8 Phenix (96-97) V-VI 2001,S.5181
9) Phenix (123) XI 2003
ND10) 7.Die Schwalbe (232) VIII 2008; (2014-11-17)
James Malcom: This was the first 4/4 Babson in a directmate-all that it lacked was a key. (2020-05-24)
more ...
comment
Keywords: Finish or retract an unfinished move, Promotion, Allumwandlung, Babson task
Genre: Retro, 3#
FEN: 6r1/5P2/7Q/p1K2PpP/R3BP2/3Nk1p1/2pnp1p1/2BbRpN1
Reprints: (VIII) Die Schwalbe 16 10/1972
Input: Gerd Wilts, 1995-06-03
Last update: James Malcom, 2020-05-24 more...
75 - P0004968
Hieronymus Fischer
28 150 Schachkuriositäten 1910
P0004968
(8+10)
Weiß zieht und setzt in einem Zuge matt
a) (ohne sBf2) 1. Lxe3#
b) (ohne sBh3) 1. Th4#
c) (ohne sBe3) 1. Lxf2#
d) (ohne sBd3) 1. De4#
e) (ohne sBc4) 1. Db4#
f) (ohne sBg6) 1. Tg4#
g) (ohne sBf7) 1. Se6#
h) (ohne sBb7) 1. Sc6#
i) (ohne sBa7) 1. Db6#
play all play one stop play next play all
Schwarz hat einen Bauer zu viel auf dem Brette (9 Stück). Nimmt man einen davon weg, so kann Weiß sofort matt setzen.
Nachdruck in 'De Waarheid' unter dem Motto: "Een kneusje"
Henrik Juel: The animation works perfectly (2020-04-17)
more ...
comment
Keywords: Illegal position, Joke, Remove pieces
Genre: Retro
FEN: 3N2R1/pp3p2/3K2p1/8/2pk4/3pp2p/3P1pB1/1Q4BR
Reprints: 144 Kurioses Schach 1960
II De Waarheid 01/04/1961
(XI) Die Schwalbe 16 10/1972
253 Probleme für Tiger 2 04/1986
Input: Gerd Wilts, 1995-06-03
Last update: Mario Richter, 2020-04-17 more...
76 - P0005062
Jürgen Tschöpe
3667 Problemkiste 97 02/1995
P0005062
(15+16) C+
BP in 2,5
Dynamoschach
1. Le3[Bh6] Dd6[Bd2]+ 2.[Bdf3] Dc6[Bd6] 3. D"R"[Bd2]
play all play one stop play next play all
more ...
comment
Keywords: Dynamo, Unique Proof Game
Genre: Retro, Fairies
Computer test: Michel Caillaud: C+ Winchloé 3.48 (2020-05-14)
FEN: rnb1kbnr/ppp1pppp/2q5/8/8/4Bp2/PPPPPPPP/RN2KBNR
Reprints: (B4) Problemkiste 101, p. 120, 10/1995
8 Variant Chess (45) 08/2004
Input: Gerd Wilts, 1995-06-03
Last update: Erich Bartel, 2020-05-15 more...
77 - P0005304
Jürgen Tschöpe
3718 Problemkiste 98 04/1995
P0005304
(16+15) C+
BP in 3,0
Dynamoschach
1. Th5[Bh6] Df6[Bh4] 2. Th4[Bh1=D] [Bhg6] 3. [Bdh6] D"R" [Td8]
play all play one stop play next play all
more ...
comment
Keywords: Dynamo, Unique Proof Game, Promotion
Genre: Retro, Fairies
Computer test: Michel Caillaud: C+ Winchloé 3.48 (2020-05-14)
FEN: rnbRkbnr/pppp1ppp/6PP/8/8/8/PPP1PPP1/RNBQKBNq
Input: Gerd Wilts, 1995-06-03
Last update: Gunter Jordan, 2020-07-01 more...
78 - P0005387
Nikita M. Plaksin
6557 feenschach 109 11/1993
P0005387
(2+2)
Weiß nimmt 1 Zug zurück, dann =1
R: 1. Ka3-a4?, dann 1. Lxa2=
R: 1. Ka3xBa4!, dann 1. Lxa2=
play all play one stop play next play all
Mit folgender witziger Begründung des Autors: "If on the board are only KL-KL (and LL on squares of the same colour), by the rules of chess an immediate draw occurs! Therefore, the retro move Ka3-a4 is illegal." Ein Fehllöser: "Reichlich trivial." Ein Ratloser: "... oder wie darf ich das sehen?" TK hatte den Durchblick: "Die doppelte Rücknahmemöglichkeit kann man aber gar nicht übersehen (und schon gar nicht der Autor). Einzige Möglichkeit: nur Ka3xBa4, weil andernfalls die Stellung schon vorher patt wäre. Aber, aber: das ist remis, kein Patt!!" FR: "Meine 'Ehrenlösung' für diese Gruppe (hoffentlich stimmt sie auch)." WM: "Nette Pointe. Das erzähl' ich meinen Kindern, daß ich einen PLAKSIN gelöst habe." 1,2/I
A harbinger of Dead Reckoning-style reasoning, before that rule ever existed. As sound today in 2018, as when it was composed under "insufficient material for mate" rule.
Henrik Juel: Nice to see that I am not the only freak who mixes english text with german notation (to avoid the ambiguous B)
Were you inspired by this problem in your work on Dead Reckoning, Andrew? (2020-05-04)
A.Buchanan: Ha no: when I stumbled across DP rule I knew even less about chess problems than I know now, if you can imagine, and had never encountered this one which Werner Keym unearthed and published it in "Out Of the Box". Ecclesiastes 1:9 says "There is nothing new under the sun." Mario made this point about origin of Schnoebelen promotions too. Gollon's intepretation of Chaturanga (the earliest known forebear of chess) offers fascinating possibilities for Schnoebelen promotion, which I am sure the Indian retrograde analysts of 7th Century CE were adept at exploiting, in tablets alas now lost. See https://www.chessvariants.com/historic.dir/chaturanga.html.

The "insufficient material" composition does perhaps explain Plaksin's openness to the concept of DP, at a time when perhaps some noses elsewhere were being turned up, as he later composed with Kornilov *27* other DP problems, all to be found in PDB. (2020-05-04)
Ladislav Packa: Interesting, but on YouTube I saw a game (one of the actors was Magnus Carlsson), which ended in a position with only two kings and one of the players still made a move. (2020-05-05)
A.Buchanan: http://wismuth.com/chess/illegal-moves.html contains many other games where GMs were unable to tear themselves away from playing the dead game. I think it's kind of sweet that the GMs just can't stop playing. Have you got a link to the Carlsen game please, Ladislav? (2020-05-06)
Ladislav Packa: I'm sorry, Andrew, but I don't remember. I've seen hundreds of games on youtube. But I encountered similar cases in my own practice, mostly a joke, and the game immediately ended with a smile and a handshake. (2020-05-06)
more ...
comment
Keywords: Help retractor, Dead Position, Aristocrat
Genre: Retro
FEN: 8/8/8/8/K7/8/b7/kB6
Reprints: 440 Out Of the Box , p. 141, 2018
www.thbrand.de 14/01/2018
Input: Gerd Wilts, 1995-06-03
Last update: A.Buchanan, 2020-05-06 more...
79 - P0005395
Gerd Wilts
Norbert Geissler

3237 U.S. Problem Bulletin 99/100 01-03/1995
P0005395
(2+1) C+
BP in 16,5
1. Sc3 d5 2. Sxd5 Lf5 3. Sxe7 Lxc2 4. Sxg8 Txg8 5. a3 Lxa3 6. Dxc2 Lxb2 7. Dxc7 Lxc1 8. Dxb8 Dxb8 9. Txa7 Dxh2 10. Txb7 Dxg1 11. Txh7 Dxg2 12. Txg7 Txg7 13. Txf7 Txf7 14. Lxg2 Txf2 15. Lxa8 Txe2 16. Kxe2 Lxd2 17. Kxd2
play all play one stop play next play all
Mario Richter: I'm sure this problem was C+ already in 1995 - simply because it was a result of an exhaustive computer search on massacre proof games - perhaps Gerd or Norbert can provide some background info ... (2020-02-11)
more ...
comment
Keywords: Unique Proof Game, Massacre PG
Genre: Retro
Computer test: C+ Jacobi 01-01-2020
FEN: B3k3/8/8/8/8/8/3K4/8
Input: Gerd Wilts, 1995-06-03
Last update: A.Buchanan, 2020-01-02 more...
80 - P0005396
Gerd Wilts
Norbert Geissler

PDB CD-ROM 1998
P0005396
(2+1) C+
BP in 16,5
1. d4 Sc6 2. Lf4 Sxd4 3. Lxc7 Sxe2 4. Lxe2 a6 5. Lxa6 Dxc7 6. Lxb7 Dxh2 7. Txh2 Txa2 8. Txh7 Txa1 9. Txh8 Txb1 10. Txg8 Txb2 11. Dxd7+ Kxd7 12. Txf8 Txc2 13. Txf7 Txf2 14. Lxc8 Kxc8 15. Txe7 Txg2 16. Txg7 Txg1 17. Txg1
play all play one stop play next play all
paul: Jacobi tested it in about 1 hour. (2020-01-03)
Henrik Juel: C+ by Popeye 4.61 in 29 minutes
But Jacobi is faster when constraints are possible, and it has a heuristic solver (2020-01-03)
comment
Keywords: Unique Proof Game, Massacre PG
Genre: Retro
FEN: 2k5/8/8/8/8/8/8/4K1R1
Input: Gerd Wilts, 1995-06-03
Last update: Gerd Wilts, 2004-08-11 more...
81 - P0005551
Werner Meyn
Erich Bartel
Günter Lauinger
Pedro Gomez Masia
Jorge Joaquin Lois
Emiliano F. Ruth

22 feenschach 34, p. 299, 06-07/1976
P0005551
(8+2)
#1 (wer?)
1. ... Txh1#
1. 0-0#? (W ist nicht am Zug)
play all play one stop play next play all
Henrik Juel: -1... Kc2xLc2?? puts sK in an impossible double check (2020-02-18)
Henrik Juel: Kc2xLc1, of course (2020-02-18)
Gerald Ettl: Handelt es sich bei Werner Meyn um Werner Keym? (2020-02-18)
Felber, Volker: Diese Aufgabe steht in feenschach (34) auf Seite 11 als Nr. 22. Die Zuordnung zu den Autoren habe ich nicht gefunden - aber auf Seite 13 ist WERNER MEYN, Jevenstedt (22. J.) genannt. Lt. PDB-Autorendatei ist Werner Meyn am 8.8.1953 geboren, Werner Keym am 22.2.1942. (2020-02-19)
Gerald Ettl: Danke fuer die Information. (2020-02-20)
comment
Keywords: Whose move?, Castling, No legal last move for Black
Genre: Retro
FEN: 8/8/8/8/8/7P/1P2RPNr/1Bk1K2R
Input: Gerd Wilts, 1995-06-03
Last update: Alfred Pfeiffer, 2020-02-19 more...
82 - P0005682
Werner Keym
Bernd Schwarzkopf

Die Schwalbe 137 10/1992
P0005682
(2+2)
Welches ist der nächste Zug?
1. a6
play all play one stop play next play all
Bernd Schwarzkopf: Nächster Zug: 1.- a7-a6 (2020-01-16)
Henrik Juel: Black has no last move, so it is Black to move; his only possibility is 1... a6 (2020-01-16)
comment
Keywords: Next move? (B), Type A
Genre: Retro
FEN: k1K5/p7/8/P7/8/8/8/8
Input: Gerd Wilts, 1995-06-06
83 - P0005956
Unto Heinonen
8887 Die Schwalbe 153 06/1995
P0005956
(11+14) cooked
BP in 36,0
1. h4 a5 2. h5 a4 3. h6 Ta5 4. hxg7 h5 5. g4 h4 6. g5 h3 7. g6 Tg5 8. e4 Tg2 9. Dg4 h2 10. Se2 Th3 11. Tg1 h1=S 12. f4 Sf2 13. f5 Sd1 14. f6 Sc3 15. fxe7 f5 16. a3 Sf6 17. g8=L Lg7 18. La2 Lh8 19. g7 Sb5 20. g8=L Sa7 21. Lgb3 d5 22. e5 Kd7 23. e8=S Kc6 24. Sd6 Kb6 25. Sc4+ dxc4 26. e6 cxb3 27. e7 bxa2 28. e8=L Tb3 29. Lb5 c6 30. d4 cxb5 31. d5 Ka6 32. d6 Sd5 33. d7 Df6 34. d8=L Ld7 35. La5 b6 36. Th1 bxa5
play all play one stop play next play all
Cook: Dual 21. Lgc4! d5 22. e5 Kd7 23. e6+ Kc6 24. e8=L+ Kb6 25. Leb5 c6 26. e7 dxc4 27. e8=D cxb5 28. De3+ Ka6 29. Db3 cxb3 30. d4 bxa2 31. d5 Tb3 32. d6 ... (paul)

NL 1. h4 f5 2. h5 Sf6 3. h6 a5 4. hxg7 h5 5. g8=D Ta6 6. a3 Tb6 7. Da2 h4 8. Th3 e5 9. Tb3 h3 10. g4 h2 11. g5 h1=S 12. g6 Sg3 13. g7 Sge4 14. g8=D Sc3 15. Dc4 d5 16. f4 dxc4 17. fxe5 cxb3 18. e6 bxa2 19. e4 Tb3 20. e7 Kd7 21. Dg4 Kc6 22. e8=D+ Kb6 23. Da4 Sb5 24. e5 Sa7 25. e6 Th2 26. e7 Tg2 27. e8=L Lg7 28. Leb5 c6 29. Se2 cxb5 30. d4 bxa4 31. d5 Ka6 32. d6 Sd5 33. d7 Df6 34. d8=T Ld7 35. Th8 b5 36. Th1 Lh8
more ...
comment
Keywords: Ceriani-Frolkin Theme (LLLLS), Unique Proof Game, Non-standard material, Promotion (s)
Genre: Retro
FEN: 1n5b/n2b4/k4q2/pp1n1p2/p5Q1/Pr6/pPP1N1r1/RNB1KB1R
Input: Gerd Wilts, 1995-06-30
Last update: Alfred Pfeiffer, 2020-07-11 more...
84 - P0006272
Tivadar Kardos
6373 FEENSCHACH 07-08/1963
P0006272
(2+2) cooked
-1(w+s), dann h#1
R: 1. Sf7xTh8 b3xDc2, dann 1. 0-0 Dg6#
play all play one stop play next play all
Cook: NL:
R: 1. h7-h8=S Kf7xDe8,Kf8xDe8 dann 1. Kg7 h8=D# (MRi)
Adrian Storisteanu: Possible fix (ugly, though it keeps the idea of not obstructing / shutting off the wQ): +wPh6 (3+2). (2020-01-31)
Adrian Storisteanu: (... Well, perhaps the 'obstructing' thing pushes it a bit.)
 
Interesting twin, with echo mate (bPc2 still being somewhat useful):
b)wSh8->h6 (2+2)
- 1.Sf7xRh6 Rh8xQh6 & 1.Rh8-f8 Qh6-e6# (2020-01-31)
more ...
comment
Keywords: Help retractor, Castling in the forward play, Castling
Genre: Retro
Computer test: Popeye Windows-32Bit v4.55 (312 MB) & Rawbats
FEN: 4k2N/8/8/8/8/8/2p5/2K5
Input: Gerd Wilts, 1995-08-20
Last update: Alfred Pfeiffer, 2020-02-10 more...
85 - P0006284
Werner Speckmann
5040 Schach 10/1965
Dr. G. Kaiser zum 75. Geburtstag gewidmet
P0006284
(2+2)
#8
b) sTh8 nach a8: #7
a) 1. Dc1 Kd8 2. Kd6 Ke8 3. Dc8+ Kf7 4. Dxh8 Kg6 5. Ke5 Kf7 6. Dh7+ Ke8 7. Ke6 Kd8 8. Dd7#
7. ... Kf8 8. Df7#,Dh8#
5. ... Kg5 6. Dg7+ Kh4 7. Kf4 Kh3 8. Dg3#
6. Dg8+
2. ... Th7 3. Dg5+ Kc8 4. Df5+
4. Dg8+

b) 1. Df1 Kd8 2. Df8+ Kc7 3. Dxa8 Kb6 4. Kd5 Kc7 5. Da7+ Kd8 6. Kd6 Ke8 7. De7#
6. ... Kc8 7. Dc7#,Da8#
4. ... Kb5 5. Db7+ Ka4 6. Kc4 Ka3 7. Db3#
6. ... Ka5 7. Db5#,Da7#
5. Db8+
1. ... Ta7 2. Db5+ Kf8 3. Dc5+
3. Db8+
play all play one stop play next play all
Schwarz kann nicht rochieren, da entweder der sK oder der sT zuletzt gezogen haben müssen.
Sally: a)1.Dc1 - Kd8,2. Kd6 - Ke8, 3. Dc8+ - Kf7, 4. Dxh8 - Kg6,
5.Ke4 - Kf7 6. Dh7+- Ke8, 7. Ke6 - Kd8, 8. Dd7#.
b)1.Df1 - Kd8,2. Df8+- Kc7, 3. Dxa8 - Kb6, 4. Kd5 - Kc7,
5.Da7+- Kd8,6. Kd6 - Ke8, 7. De7#.S. 131 Schwalb 8. 1995.
Nr. 370: S. Matt in 4 + mehr Zügrn (Speckmann 1992) (2011-03-04)
Henrik Juel: Slightly damaged by mate duals (2020-05-01)
comment
Keywords: Cant Castler (sk,sl), Castling in the forward play (sk,sl), Echo
Genre: Retro
FEN: 4k2r/8/4K3/8/8/8/8/4Q3
Reprints: (7) Die Schwalbe 154 08/1995
Input: Gerd Wilts, 1995-08-23
Last update: Rainer Staudte, 2020-05-01 more...
86 - P0006353
Yosif Krikheli
9610 FEENSCHACH 03-04/1970
P0006353
(4+6) C+
-1(w+s), dann h#1
R: 1. 0-0-0 Ke8xTf7, dann 0-0-0 Ta8#
play all play one stop play next play all
Gerald Ettl: stimmt die Stellung. Warum Ke8xTf7 (gehoert sDd7 und sBe7 weg) ? (2020-03-27)
Gerald Ettl: achso, sonst hat Weiss keinen Zug mehr... sehe ich gerade (2020-03-27)
Mario Richter: Genau! Nach R: 1. 0-0-0 muß Schwarz das weiße Retropatt durch einen Entschlag aufheben, und nach 1. ... Ke8xD,L,Sf7?? dürfte Schwarz im Vorwärtsteil nicht rochieren ...
Ohne sDd7 und sBe7 gäbe es außerdem jede Menge weiterer Lösungen. Manchmal bedeutet "C+" tatsächlich, daß das Problem korrekt ist :-) (2020-03-27)
comment
Keywords: Help retractor, Castling in the retro play, Castling in the forward play, Castling
Genre: Retro
Computer test: Popeye Windows-32Bit v4.55 (312 MB) & Rawbats
FEN: r7/1ppqpk2/8/8/8/8/3P2P1/2KR4
Input: Gerd Wilts, 1995-09-10
Last update: Alfred Pfeiffer, 2014-11-25 more...
87 - P0006453
Jürgen Tschöpe
(B2) Problemkiste 101, p. 120, 10/1995
P0006453
(16+15) C+
BP in 2,5
Dynamoschach
1. Le3[Bf4] Df6[B"R"] 2. Lc5[Bd4] Df5[Bf2] 3.[Bd2]
play all play one stop play next play all
more ...
comment
Keywords: Dynamo, Unique Proof Game, Interchange
Genre: Retro, Fairies
Computer test: Michel Caillaud: C+ Winchloé 3.48 (2020-05-14)
FEN: rnb1kbnr/pppp1ppp/8/2B2q2/8/8/PPPPPPPP/RN1QKBNR
Input: Gerd Wilts, 1996-06-13
Last update: Erich Bartel, 2020-05-15 more...
88 - P0006454
Jürgen Tschöpe
(B3) Problemkiste 101, p. 120, 10/1995
P0006454
(15+16)
BP in 3,0
Dynamoschach
1. Dg4[B"R"] Lg7[Bh6] 2. Dg3[Lg6] Le4[Bg6] 3.[Bg7][Bh7]
play all play one stop play next play all
Michel Caillaud: C+ Winchloé 3.48 (2020-05-14)
comment
Keywords: Dynamo, Unique Proof Game, Interchange
Genre: Retro, Fairies
FEN: rnbqk1nr/pppppppp/8/8/4b3/6Q1/PPPP1PPP/RNB1KBNR
Input: Gerd Wilts, 1996-06-13
Last update: A.Buchanan, 2014-05-20 more...
89 - P0006455
Jürgen Tschöpe
(B5) Problemkiste 101, p. 120, 10/1995
P0006455
(15+15)
BP in 2,5
Dynamoschach
1. Dd4[Bd5] Df6[Bh4] 2. Da4[Bb4] L"R"[Be7] 3. Dd1[B"R"]
play all play one stop play next play all
Michel Caillaud: C+ Winchloé 3.48 (2020-05-14)
comment
Keywords: Dynamo, Unique Proof Game, Pure Round Trip
Genre: Retro, Fairies
FEN: rnb1k1nr/pppppppp/5q2/3P4/8/8/PP2PPPP/RNBQKBNR
Input: Gerd Wilts, 1996-06-13
Last update: A.Buchanan, 2014-05-20 more...
90 - P0006458
Jürgen Tschöpe
T1 Problemkiste 102, p. 149, 12/1995
P0006458
(15+15)
BP in 2,5
Dynamoschach
1. Lf4[Bh6] Dg5[B"R"] 2. Le5[Bf4][Bd2] 3. T"R"[Bh2]
play all play one stop play next play all
Michel Caillaud: Cook
1.Le3(Bf4) Dg5(B"R") 2.(Le5) (Bd2) 3.T"R" (2020-05-14)
comment
Keywords: Dynamo, Unique Proof Game
Genre: Retro, Fairies
FEN: rnb1kbnr/pppp1ppp/8/4B1q1/8/8/PPPPPPPP/RN1QKBN1
Input: Gerd Wilts, 1996-06-16
Last update: A.Buchanan, 2014-05-20 more...
91 - P0006459
Jürgen Tschöpe
T2 Problemkiste 102, p. 149, 12/1995
P0006459
(14+14)
BP in 2,5
Dynamoschach
1. Db3[B"R"] Db6[B"R"] 2. Ta4[Ba6] D"R" 3. D"R"[Ba2]
play all play one stop play next play all
Michel Caillaud: C+ Winchloé 3.48 (2020-05-14)
comment
Keywords: Dynamo, Unique Proof Game
Genre: Retro, Fairies
FEN: rnb1kbnr/pp1ppppp/8/8/R7/8/PP1PPPPP/1NB1KBNR
Input: Gerd Wilts, 1996-06-16
Last update: A.Buchanan, 2014-05-20 more...
92 - P0006460
Jürgen Tschöpe
T3 Problemkiste 102, p. 149, 12/1995
P0006460
(15+16)
BP in 3,0
Dynamoschach
1. Lb2[Ba3] Sd7[Bf6] 2.[Bd4][Sh3] 3. L"R"[Bb2][Bd7]
play all play one stop play next play all
Michel Caillaud: C+ Winchloé 3.48 (2020-05-14)
more ...
comment
Keywords: Dynamo, Unique Proof Game
Genre: Retro, Fairies
FEN: r1bqkbnr/pppppppp/8/8/8/7n/PPPPPPPP/RN1QKBNR
Input: Gerd Wilts, 1996-06-16
Last update: A.Buchanan, 2014-05-20 more...
93 - P0006461
Jürgen Tschöpe
T4 Problemkiste 102, p. 149, 12/1995
P0006461
(16+15)
BP in 3,0
Dynamoschach
1. Dg4[Bh5] Lg7[Bh6] 2. Lg5 S"R"[Bhg8] 3. Dd1[Be2] g7
play all play one stop play next play all
Michel Caillaud: C+ Winchloé 3.48 (2020-05-14)
comment
Keywords: Dynamo, Unique Proof Game
Genre: Retro, Fairies
FEN: rnbqk2r/pppppppp/8/6b1/8/8/PPPPPPPP/RNBQKBNR
Input: Gerd Wilts, 1996-06-16
Last update: A.Buchanan, 2014-05-20 more...
94 - P0006462
Jürgen Tschöpe
T5 Problemkiste 102, p. 150, 12/1995
P0006462
(15+15)
BP in 2,0
Dynamoschach
1. Th3[Bh6] S"R"[g8S] 2. S"R"[Bg8] g7[g6]
play all play one stop play next play all
Michel Caillaud: C+ Winchloé 3.48 (2020-05-14)
comment
Keywords: Dynamo, Unique Proof Game
Genre: Retro, Fairies
FEN: rnbqkb1r/pppp1ppp/6p1/8/8/7R/PPPPPPP1/RNBQKBN1
Input: Gerd Wilts, 1996-06-16
Last update: A.Buchanan, 2014-05-20 more...
95 - P0006463
Jürgen Tschöpe
T6 Problemkiste 102, p. 150, 12/1995
P0006463
(14+15)
BP in 2,5
Dynamoschach
1. Th5[Bh6] S"R"[g8L] 2. Lf7[Be6] Kf8[Lg8] 3. L"R" [T"R"]
play all play one stop play next play all
Michel Caillaud: C+ Winchloé 3.48 (2020-05-14)
comment
Keywords: Dynamo, Unique Proof Game
Genre: Retro, Fairies
FEN: rnbq1kbr/ppppp1pp/4p3/8/8/8/PPPPPPP1/RNBQKBN1
Input: Gerd Wilts, 1996-06-16
Last update: A.Buchanan, 2014-05-20 more...
96 - P0006464
Jürgen Tschöpe
T7 Problemkiste 102, p. 150, 12/1995
P0006464
(10+15)
BP in 3,0
Dynamoschach
1. Th1"R"[B"R"] Th7[Bh1=D] 2. Ta1"R"[S"R"] Dg2 [Be4] 3. D"R"[L"R"] D"R"[Bfg2]
play all play one stop play next play all
Michel Caillaud: C+ Winchloé 3.48 (2020-05-14)
comment
Keywords: Dynamo, Unique Proof Game
Genre: Retro, Fairies
FEN: rnbqkbn1/pppppppr/8/8/4P3/8/PPPPP1P1/4KBN1
Input: Gerd Wilts, 1996-06-16
Last update: A.Buchanan, 2014-05-20 more...
97 - P0006536
René Jean Millour
2 Probleemblad 01/1995
P0006536
(8+7+1)
Wo steht der wK? Wo wurden die sLL geschlagen?
Imitator g1
Mu-Tsun Tsai: white king at h6, black bishops was captured at b3 and h8. (2011-04-24)
Henrik Juel: Some more justification would be nice, preferably along with a proof game
Here is a beginning attempt:
Black captured [Lc1,Lf1] at home, e7xd6xc5xb4xa3-a2-a1=S, and bxa
The Imitator must have ended below the white pawns as the result of a move by a sS, which can be uncaptured by the added wK (2020-06-11)
comment

Pieces: i = Imitator (I)
Genre: Retro
FEN: 8/p2p4/2p5/p7/8/kP6/1PPPPPPP/n2r2-I1
Input: Gerd Wilts, 1996-06-16
Last update: Alfred Pfeiffer, 2020-06-11 more...
98 - P0006970
Gideon Husserl
1354 feenschach 24 08/1974
nach G. Brieger
P0006970
(4+2) cooked
Ergänze wK und sK so, daß Weiß #1
a) +wKe2,+sKg4: 1. Kxe1#
play all play one stop play next play all
Cook: (FBu)
b) +sKa3,+wKa/c1: 1. ... Db4 Ta5#
c) +sKf4,+wKd4: 1. ... De5+ Lxe5#
Die Aufgabe wird korrekt, wenn die Forderung wie folgt lautet:
"Ergänze weißen und schwarzen König, so daß Weiß am Zuge in 1 Zug mattsetzen kann."
Adrian Storisteanu: White-to-play is implied in the stipulation as it is!? Those are no cooks... (2020-01-18)
Adrian Storisteanu: Brieger's might be P1012639 (Robert Sinclair Brieger)?! (2020-01-18)
Henrik Juel: The problem by R.S. Brieger is very different from this one
Mate in one is not always well defined in retro problems, but I agree with Adrian, that the 'cooks' here seem rather far-fetched, as Black is helping (2020-01-18)
comment
Keywords: Add pieces
Genre: Retro
FEN: 8/8/3B4/7R/8/8/6r1/3Bq1R1
Input: Gerd Wilts, 1996-08-11
Last update: Alfred Pfeiffer, 2015-05-13 more...
99 - P0007822
Wolfgang Dittmann
(18) feenschach 55, p. 124, 07/1981
P0007822
(7+9)
Erster Zug der UDa8?
R: 1. Da8-a6 a5-a4 2. a7-a8=D a6-a5 3. b6xTa7 Ta8-a7 etc
play all play one stop play next play all
A.Buchanan: There were *2* queen promotions on a8. So which of them does the stipulation refer to. The first which ended up on f8 but its first move might have been to a7,b8,c8,d8,e8 or f8. The second one moved straight to a6. So which of them does the stipulation refer to?
The underlying problem is that there is precise definition of the "first move" stipulation, as far as I know. Should it refer to the start square of the piece or the end square? Suppose the piece is captured prior to the diagram position? In this position, if we ask for "Erster Zug der Da6?" this is a slight spoiler but I still think it's the better choice. (2016-07-18)
A.Buchanan: Typo: should be "...*no* precise definition..." above. (2016-07-18)
A.Buchanan: Can we shift wK to c4 to stop sBa wiggling on the way back? (2020-04-25)
more ...
comment
Keywords: First Move? (UD-), Non-standard material (DD), Type A, Economy record (First move)
Genre: Retro
FEN: 4QQNk/1ppppppp/Q7/8/p7/8/PP6/4K3
Reprints: 2.32 Eigenartige Schachprobleme , p. 200, 2010
Input: Gerd Wilts, 1996-09-03
Last update: A.Buchanan, 2020-04-23 more...
100 - P0008073
Johannes M. Ott
3708 feenschach 63 12/1982
P0008073
(5+11)
Erster Zug des wTc8?
R: 1. Te8xDc8 Dd8xTc8+ 2. Bf7xSe8=T e.g. Sf6-e8,Sf6xe8 3. g6xLf7,g6x?f7
play all play one stop play next play all
This problem is one of the most complex of this subgenre, with a very deep try to unravel. We know wK entered Bl camp via g6, so we can't retract bPe6 or bPh6. Now, bK did not just come from d8 (double check) or e8 (no way wR could be delivering checkd7: d7xc8=R would have wPd7 illegally checking bKe8). So White just moved, R: 1. Re8*c8. To give Bl a prior move, this move must have been a capture, and moreover must be wRe8xQ/Rc8.

If you say Q, then you get the solution. But the interesting retro play is what happens if you assume it was R.

In either case, R: 1... Q/Rd8xR/Sc8 2. fxSe8=R Sf6*e8 3. gxQ/R/Bf7. Now let's look at missing Bl units. In the original diagram, QRRBS were missing. kR was captured in the NE cage, and can be discounted. Q/R captured on c8, S on e8, something on f7 and something on g-file, as wPg2 is still present. That accounts for all the Bl units. The position is something like this: nKRr1b2/BpPkpqp1/1ppppnPp/8/8/8/6P1/8

Therefore wPc7 never captured, and wBa7 is original. So bPc6 & bPd6 must have cross-captured. We can retract bK out of the NW cage, uncapturing wS at some point to give Wh infinite unmoves. Now if Wh had played R: 1... Re8xQc8, then we can just retract bQ out of the cage. But let's see what happens if R: 1... Re8xRc8.

We can't retract bPd7xc6 until bB is on c1. If it was R: 2. Rd8xSc8, then the NW corner can never be unlocked, so it was R: 2. Rd8xRc8. Now we can push bR to e8, wR to d8 to shield it, wK to d7, wR to c8 bR to d8, put e.g wS d8 to shield wK escape. So we reach something like this: n1Rr1b2/BpP1p1p1/1pppp2p/8/4bnqk/8/4NKPP/8

We can retract bPf7xc6, but that doesn't help us. Nor does bPa7xb6, as wB is locked on b8. If we shift bB to c8, then we can put 1 of the two blocked rooks on b8, but then when retract d7xc6, the other trapped rook is still in the shrunken cage of d8&e8. White or black, it can't retract out. Therefore the key move earlier was for the freshly promoted R to capture Q on c8.

So the try R: 1. Re8xRc8 looks as if it cannot fail, as both kings are able to flee the cage. But at the last minute we realize that the collapsing cage is too small for both rooks to inhabit. Wonderful stuff! (ABu)
Henrik Juel: Here is a possible release, using KDTLSP for the men and ws for the colors
R: 1.Te8xDc8 Dd8xTc8+ 2.f7xSe8=T Sf6-e8 3.g6xTf7 Se4xTf6 4.h5xLg6,
retract wTf6 to h1, wPh5 to h2,
extract sLg6, sTf7, sKd7, sDd8,
retract wTc8 to d7, wKb8 to e1, wTd7 to b8, sL to c8, d7xDc6, wDc6 to d1,
R: 22.c6-c7 Sc7-a8 23.Ta8-b8 .. 24.Lb8-a7 .. 25.Ta1-a8,
retract sT to a8,
R: 33... a7xPb6 34.b5-b6 Sa6-c7,
retract wLb8 to c1, etc. (2020-05-25)
comment
Keywords: First Move? (UTxD), Type A, Economy record (First move)
Genre: Retro
FEN: nKR2b2/BpPkp1p1/1pppp2p/8/8/8/6P1/8
Reprints: 2.40 Eigenartige Schachprobleme , p. 200, 2010
Input: Gerd Wilts, 1996-09-05
Last update: A.Buchanan, 2020-05-27 more...
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The problems of this query have been registered by the following contributors:

Gerd Wilts (100)