Die Schwalbe

54 problem(s) found in 2782 milliseconds (displaying 54 problem(s)). [COMMENTDATE>=20220810 AND NOT K='Weglenkung' AND S='diagrammes'] [download as LaTeX]

1 - P0000136
Dmitri W. Pronkin
Andrey Frolkin

6631v Die Schwalbe 117 06/1989
Preis
P0000136
(14+14)
BP in 57.5
1. a4 h5 2. a5 h4 3. a6 h3 4. axb7 hxg2 5. h4 d5 6. h5 d4 7. h6 d3 8. h7 dxc2 9. d4 a5 10. Lh6 c1=T 11. e4 Tc5 12. Se2 Th5 13. e5 c5 14. e6 Sc6 15. b8=T a4 16. Tb4 a3 17. Ta4 c4 18. b4 c3 19. b5 c2 20. b6 c1=T 21. b7 Tc4 22. b8=T Da5+ 23. Tbb4 Lb7 24. S1c3 0-0-0 25. exf7 e5 26. Tc1 Lc5 27. f8=T a2 28. Tf3 a1=T 29. Sa2 g1=T 30. Tfa3 Tg6 31. f4 Te6 32. f5 g5 33. f6 g4 34. f7 g3 35. f8=T g2 36. Tf5 g1=T 37. Lf8 Tg7 38. Sg3 e4 39. Ld3 e3 40. 0-0 e2 41. Tcc3 e1=T 42. Lc2 T1e3 43. d5 Tdd7 44. d6 Tdf7 45. d7+ Kb8 46. Dd6+ Ka8 47. Dc7 Sge7 48. d8=T+ Sc8 49. Tdd3 Thg8 50. h8=T Tae1 51. Th6 T1e2 52. T1f2 Tce4 53. Kf1 Ld4 54. Tfc5 Se5 55. Sf5 Sc4 56. Sd6 Sb2 57. Tbc4 Sb6 58. Db8+
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Der absolute KBP-Längenrekord.
See P1338946 cooked.
paul: Compare with P0002278 & P0002279 (2010-04-30)
Mu-Tsun Tsai: This one is by far the toughest retro I've ever solved. Very little certain information can be determined by structural consideration alone, even with long and complicated argument. It took me five days to complete solving this. (2012-07-22)
A.Buchanan: @Mu-Tsun: that's an interesting data point - thanks for posting. (2017-09-07)
Henrik Juel: The current record is 58.5 moves in a proof game problem by the authors + Keym, Die Schwalbe 2017 (2017-09-07)
Henrik Juel: I just learned that the 58.5 move proof game has been cooked... (2017-09-07)
A.Buchanan: In retrospect, my earlier comment about "interesting data point" is a bit weak. It's actually great that for such an extreme problem, someone took substantial time to independently validate it. It's like doing science: people want to do their own new stuff, and are unwilling to take the time to validate what's already been claimed. This one has survived 30+ years, and maybe the use of constraints e.g. in Jacobi can eventually allow it to be HC+. (2021-05-29)
Olaf Jenkner: This problem is the current record, because P1338946 (58.5 moves) has been cooked. (2021-11-25)
Reto: This is C+ up to 51.0 moves with Stelvio 2.0. This ties the record for partial testing of an SPG. Took 1200 CPU hours of strategy seeking (finding 378 0+0 strategies) and another 13h of strategy playing these strategies. If this can ever be completely solved, then it needs to be the case that all strategies have 0+0 free moves, otherwise playing is utterly hopeless.
@Andrew: There is absolutely no way a brute-force based program like Jacobi ever stands a chance at solving something like this, no matter how many conditions you add. (2023-12-14)
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Keywords: Unique Proof Game, Move Length Record, Non-standard material (TTTTTTtttttt), Castling, Aristocrat, Superseded by (P1397486)
Genre: Retro
FEN: kQ3Br1/1b3rr1/1n1Nr2R/q1R4r/R1Rbr3/R1RRr3/NnB1rR2/5K2
Reprints: 584 Ukrainisches Album 1986-1990
86 Shortest Proof Games 11/1991
(6) diagrammes 103 10-12/1992
H18 FIDE Album 1989-1991 1997
feenschach 137, p. 368, 08-09/2000
Input: Gerd Wilts, 1995-06-03
Last update: James Malcom, 2021-12-25 more...
2 - P0001285
Jean Oudot
370 Die Schwalbe 07/1960
R. Bédoni gewidmet
P0001285
(11+11) C+
h#2*
* 1. ... dxc5 2. Dxh3 0-0-0#
1. Db2 Le2+ 2. Kc2 Ld1#
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Henrik Juel: the five missing black men were captured by white pawns (exfxgxh, fxgxj), so with Black to move last move was with Ta1 or Ke1, and White may not castle
C+ Popeye 4.61 (2022-11-26)
A.Buchanan: Pleasant White tempo play in both phases (2022-11-27)
comment
Keywords: Cant Castler (wl), Castling (wl)
Genre: Retro, h#
Computer test: HC+ Popeye 4.61 with simple retro logic
FEN: 8/7p/7P/2pr2pP/2bP2Pb/2pk1BRP/6qN/R3KNrn
Reprints: 553 FIDE Album 1959-1961 1966
157 Europe Echecs 90 07/1966
(10) diagrammes 112 01-03/1995
Input: Gerd Wilts, 1995-06-03
Last update: A.Buchanan, 2022-11-27 more...
3 - P0001550
Michel Caillaud
421 Europe Echecs 295 07/1983
A. Hazebrouck gewidmet
1. Preis
P0001550
(13+12) C+
BP in 35.5
1. h4 c5 2. h5 c4 3. Th4 c3 4. Tc4 b5 5. g4 b4 6. Lg2 b3 7. Lc6 bxa2 8. b4 a5 9. b5 a4 10. b6 a3 11. La4 Sc6 12. b7 d5 13. b8=D d4 14. Dd6 d3 15. Dg6 dxc2 16. d3 fxg6 17. Ld2 c1=L 18. Db3 c2 19. La5 Lh6 20. Sd2 c1=L 21. Sf1 Lcg5 22. f4 Kf7 23. 0-0-0 a1=L 24. fxg5 a2 25. gxh6 Kf6 26. Sh2 Kg5 27. Tf1 Lf6 28. Tff4 a1=L 29. Kb1 Lae5 30. d4 Lb7 31. dxe5 Dd2 32. exf6 Te8 33. f7 Sf6 34. Dd3 Sd7 35. Ld1 Sdb8 36. Sgf3+
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5 Frolkin-Ceriani-Umwandlungen: 4 schwarze Läufer und 1 weiße Dame! Eine der bahnbrechenden frühen KBPs.
Silvio Baier: Der wesentliche thematische Inhalt ist bereits nach 31,5 Zügen erreicht. Bis dahin ist es C+ (Euclide 0.98). (2010-08-04)
James Malcom: Is this fully C+ then? (2021-01-27)
Henrik Juel: No, only the first 31.5 moves are tested OK (2021-01-27)
James Malcom: No Henrik, as in is the entire problem testable. (2021-01-27)
Henrik Juel: I guess that testing the entire problem would take an unreasonably long time (2021-04-06)
A.Buchanan: It might be possible these days: the motivation for stopping at 31.5 is that the promotion theme had been demonstrated by then. But there’s still e.g. bSb8 as random impostor (2021-04-07)
Moldenhauer: Computerprüfung: C+ Stelvio 1.11 50:24:34 Stunden.(hh:mm:ss)
Keine Lösung: BP 34.5, BP 35.0. (2023-05-08)
Henrik Juel: Thanks for your patience, Moldenhauer; more than two days... (2023-05-08)
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Keywords: Ceriani-Frolkin Theme (llllD), Unique Proof Game, Castling, Promotion (llllD), Impostor (s)
Genre: Retro
Computer test: Computerprüfung: C+ Stelvio 1.11 50:24:34 Stunden.(hh:mm:ss) Keine Lösung: BP 34.5, BP 35.0.
FEN: 1n2rb1r/1b2pPpp/2n3pP/B5kP/2R2RP1/3Q1N2/3qP2N/1K1B4
Reprints: 25 Shortest Proof Games 11/1991
(1) diagrammes 103 10-12/1992
(A) Quartz 22 10-12/2002
(8-a) Die Schwalbe 250A 08/2011
Input: Gerd Wilts, 1995-06-03
Last update: James Malcom, 2021-04-07 more...
4 - P0001577
Michel Caillaud
447 Europe Echecs 316 04/1985
2. Preis
P0001577
(14+11) C+
BP in 26,5
1. f4 h5 2. f5 h4 3. f6 h3 4. fxe7 hxg2 5. h4 g5 6. h5 g4 7. Th4 g3 8. Sh3 g1=L 9. Lg2 Le3 10. Lc6 g2 11. dxe3 g1=T+ 12. Kf2 Tg3 13. e4 Tb3 14. axb3 f5 15. Ta6 f4 16. La4 f3 17. Kg3 f2 18. Th6 f1=D 19. Dd6 Df7 20. Lf4 Dc4 21. bxc4 a5 22. Lb3 a4 23. Da6 a3 24. Ld6 a2 25. Sf4 axb1=S 26. La2 Sc3 27. bxc3
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Erstdarstellung einer Frolkin-Ceriani-Allumwandlung in einer eindeutigen KBP.
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Keywords: Allumwandlung, Ceriani-Frolkin Theme (dtls), Unique Proof Game, Homebase (S)
Genre: Retro
Computer test: Euclide 0.93 Ergänzung Stelvio 1.2. Keine Lösung BP 25.5, BP 26.0.
FEN: rnbqkbnr/1pppP3/Q2B3R/7P/2P1PN1R/2P3K1/B1P1P3/8
Reprints: 13 Shortest Proof Games 11/1991
(19) diagrammes 15 07-09/1994
Thema Danicum 106 2002
(B) Quartz 26 10-12/2004
Input: Gerd Wilts, 1995-06-03
Last update: A.Buchanan, 2023-05-21 more...
5 - P0001637
Andrej N. Kornilow
Andrey Frolkin

506v Europe Echecs 364 04/1989
P0001637
(16+10) C+
BP in 13,5
2 solutions
1. Sc3 c5 2. Sd5 c4 3. Sxe7 c3 4. Sxg8 Dh4 5. Sh6 g5 6. Sxf7 Lg7 7. Se5 0-0 8. Sxd7 Lh8 9. Sxb8 Ld7 10. Sc6 Tc8 11. Sxa7 La4 12. Sb5 Tc6 13. Sa3 b5 14. Sb1
und
1. Sf3 c5 2. Se5 c4 3. Sxd7 c3 4. Sxb8 Ld7 5. Sc6 Tc8 6. Sxa7 La4 7. Sc6 b5 8. Sxe7 Tc6 9. Sxg8 Dh4 10. Sh6 g5 11. Sxf7 Lg7 12. Se5 0-0 13. Sf3 Lh8 14. Sg1
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Moldenhauer: Ergänzung: Stelvio 1.2. Keine Lösungen BP 12.5, BP 13.0.
Es ist wirklich eine Rarität dass es 2 komplette Lösungen gibt. (2023-05-20)
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Keywords: Unique Proof Game, Homebase (W), Initial Game Array (W), Castling
Genre: Retro
Computer test: Natch 2.2 Copyright (C) 1997,98,99,2001,2002,2003 Pascal Wassong Ergänzung: Stelvio 1.2. Keine Lösungen BP 12.5, BP 13.0.
FEN: 5rkb/7p/2r5/1p4p1/b6q/2p5/PPPPPPPP/RNBQKBNR
Reprints: 569 Ukrainisches Album 1986-1990
140 Shortest Proof Games 11/1991
(10) diagrammes 15 07-09/1994
Input: Gerd Wilts, 1995-06-03
Last update: A.Buchanan, 2023-05-21 more...
6 - P0001762
Ivan Arandjelovic
2123 diagrammes 90 07-09/1989
P0001762
(16+16) cooked
BP in 16,0
1. e3 Sc6 2. La6 b5 3. Lb7 Tb8 4. La8 La6 5. a4 Tb7 6. Ta3 Db8 7. Td3 Kd8 8. Td6 Kc8 9. d3 Sd8 10. Tb6 c6 11. Ld2 Kc7 12. Lc3 Kd6 13. Lf6 Kc5 14. Sc3 Kb4 15. Dg4+ Ka5 16. Sce2 De5
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Cook: 1. d3 b5 2. Lg5 La6 3. e3 Sc6 4. Dg4 Db8 5. Le2 Db6 6. Lf3 0-0-0 7. a4 Kb7 8. Ta3 Dc5 9. Sc3 De5 10. Sce2 Kb6 11. Tc3 Tb8 12. Lf6 Sd8 13. La8 Tb7 14. Tc6+ Ka5 15. Tb6 c6
Moldenhauer: Ergänzung: Stelvio 1.2. Keine Lösung: BP 14.0, BP 14.5.
BP 15.0 und BP 15.5 cooked.
Notation BP 15.0: 1.Sc3 Sc6 2.a4 b5 3.Ta3 La6 4.d3 Db8 5.Lg5 Db6 6.Lf6 0–0–0
7.e3 Kb7 8.Dg4 Dc5 9.Le2 Kb6 10.Lf3 Ka5 11.Sce2 Tb8 12.Tc3 Sd8 13.La8 De5
14.Tc6 Tb7 15.Tb6 c6
Notation BP 15.5: 1.Sc3 Sc6 2.a4 b5 3.Ta2 La6 4.Ta3 Db8 5.d3 Db6 6.Lg5 0–0–0
7.e3 Kb7 8.Dg4 Dc5 9.Le2 Kb6 10.Lf3 Ka5 11.Sce2 Tb8 12.Tc3 Sd8 13.La8 De5
14.Tc6 Tb7 15.Tb6 c6 16.Lf6.
Alles schlagfrei und ohne Umwandlung. (2023-05-20)
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Keywords: Unique Proof Game, Capture-free
Genre: Retro
FEN: B2n1bnr/pr1ppppp/bRp2B2/kp2q3/P5Q1/3PP3/1PP1NPPP/4K1NR
Input: Gerd Wilts, 1995-06-03
Last update: A.Buchanan, 2014-05-23 more...
7 - P0002289
Andrey Frolkin
Andrej N. Kornilow

2235 diagrammes 92 01-03/1990
P0002289
(14+14) C+
BP in 21,0
1. f3 Sc6 2. Kf2 Sd4 3. Kg3 Sxe2+ 4. Kg4 Sg3 5. hxg3 Tb8 6. Th5 Ta8 7. Ta5 Tb8 8. Lb5 Ta8 9. c4 Tb8 10. Dc2 Ta8 11. Dg6 Tb8 12. d3 Ta8 13. Ld2 Tb8 14. Le1 Ta8 15. Sd2 Tb8 16. Tc1 Ta8 17. Tc3 Tb8 18. Tca3 Ta8 19. T3a4 Tb8 20. a3 Ta8 21. Lxd7+ Dxd7+
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Henrik Juel: Natch 3.1 tests the first 20.0 moves OK in 13 seconds, but the first 20.5 moves would take more than an hour, and the entire problem more than a couple of hours, because of the possibility of [Pd7] promoting
So we may never know for sure whether this proof game with 16 oscillations by Ta8 is correct (2018-12-08)
Mario Richter: Henrik, I think certainty about the correctness of this problem can be achieved, if we take into account that Black's last move must have been a capture. (2018-12-10)
A.Buchanan: Henrik: the times you propose for testing don't seem outrageous, even without Mario's sensible heuristic. Also, the last move must have been DxLd7 from one of 5 squares only. (2018-12-12)
Reto: Stelvio is now able to retract moves and solve the resulting problems individually. That helps a lot here, but still, the 5 reasonable last move retractions took over 13h in total to solve. (2023-06-11)
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Keywords: Unique Proof Game
Genre: Retro
Computer test: Stelvio 1.33, 13:30h
FEN: r1b1kbnr/pppqpppp/6Q1/R7/R1P3K1/P2P1PP1/1P1N2P1/4B1N1
Reprints: 101 Shortest Proof Games 11/1991
58b 64 Proof Games 2012
Input: Gerd Wilts, 1995-06-03
Last update: Reto, 2023-06-11 more...
8 - P0002296
Andrey Frolkin
Dmitri W. Pronkin

2179 diagrammes 91 10-12/1989
Lob
P0002296
(13+15) C+
BP in 25.0
1. a4 h5 2. Ta3 h4 3. Tc3 h3 4. Tc6 bxc6 5. g3 La6 6. Lg2 Lc4 7. Le4 Sa6 8. f3 Db8 9. Kf2 Db4 10. Ke3 0-0-0 11. Kf4 Dxd2+ 12. Kf5 Dxc2 13. Dd5 Kb7 14. Dxf7 Kb6 15. a5+ Kc5 16. b4+ Kd4 17. Lb2+ Ke3 18. La1 Kf2 19. e3 d5 20. Se2 Td6 21. Td1 Tdh6 22. Td4 g6+ 23. Ke6 Ke1 24. Kd7 e6 25. Ke8 Sf6+
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paul: Checked for the first 19 moves, by Euclide. (2011-07-01)
Moldenhauer: Computerprüfung: C+ Stelvio 1. Std. 16 Min.
Keine Lösung BP 24.0 (2023-02-06)
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Keywords: Unique Proof Game, Promenade (K), Castling, Belfort (Kk)
Genre: Retro
Computer test: Stelvio 1.0
FEN: 4Kb1r/p1p2Q2/n1p1pnpr/P2p4/1PbRB3/4PPPp/2q1N2P/BN2k3
Reprints: 114 Shortest Proof Games 11/1991
Input: Gerd Wilts, 1995-06-03
Last update: Silvio Baier, 2023-03-02 more...
9 - P0002337
Michel Caillaud
4019 Die Schwalbe 76 08/1982
Dr. Karl Fabel zum Gedenken
1. Preis
P0002337
(11+15) C+
BP in 47,0
1. Sf3 a5 2. Sd4 a4 3. Sb3 axb3 4. a3 Ta4 5. Ta2 bxa2 6. Tg1 axb1=S 7. Th1 Sc3 8. Tg1 Sd5 9. Th1 Sb6 10. Tg1 Sa8 11. Th1 b6 12. Tg1 La6 13. Th1 Dc8 14. Tg1 Db7 15. Th1 Df3 16. gxf3 h5 17. Lh3 h4 18. Le6 h3 19. La2 Lc4 20. Lb1 La2 21. b3 Thh4 22. Lb2 Thb4 23. Lf6 gxf6 24. Kf1 Lh6 25. Kg1 Kf8 26. Df1 Kg7 27. Dg2+ hxg2 28. h4 Kg6 29. Kh2 g1=S 30. Kg2 Lf4 31. h5+ Kg5 32. Th4 Lh2 33. Td4 Sh3 34. f4+ Kh4 35. Kf3 Sg5+ 36. Ke3 Kh3 37. h6 Kg2 38. h7 Kf1 39. h8=T Ke1 40. Th5 Sh7 41. Ta5 Kd1 42. Ta7 Kc1 43. Tb7 Ta7 44. Kd3 Sa6 45. Tb8 Kb2 46. Tf8 Ka1 47. Kc3 Lg1
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Henrik Juel: So Michel's proof game is not cooked; yet... (2019-09-10)
Reto: This is now the length record for a fully tested SPG. (2023-09-17)
Moldenhauer: Keine Lösung: BP 46.5. (2024-01-05)
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Keywords: Unique Proof Game, Move Length Record, Non-standard material (ss), Promotion (ssT)
Genre: Retro
Computer test: Stelvio 1.64 in around 20min (highly parallelized).
FEN: n4Rn1/r1pppp1n/np3p2/8/1r1R1P2/PPK5/b1PPPP2/kB4b1
Reprints: diagrammes 69 01-02/1985
989 FIDE Album 1980-1982 1988
81 Shortest Proof Games 11/1991
Input: Gerd Wilts, 1995-06-03
Last update: A.Buchanan, 2023-09-17 more...
10 - P0003815
Jean Oudot
Nation Belge 1956
P0003815
(5+11) C+
#2
Kann der sTh3 durch einen sB ersetzt werden?
1. Ld8
1. ... Sf2/Sc3~ 2. De3#
1. ... Sa2/Sd1~ 2. Se2#
1. ... Kxf4 2. Lxc7#
1. ... g5 2. Sh5#
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Henrik Juel: with a black pawn on h3, we have all eight black pawns on the board, but none of them could come from a7 (2022-11-26)
comment

Genre: Retro, 2#
Computer test: C+ Popeye v4.87
FEN: 8/2p3p1/2p3p1/2Q3B1/5Npp/2n3kr/7p/K2n3B
Reprints: RA13 diagrammes 15 06/1975
Input: Gerd Wilts, 1995-06-03
Last update: A.Buchanan, 2022-11-27 more...
11 - P0003816
Jean Oudot
Nation Belge 1956
P0003816
(6+2) C+
#3
1. ... h6 2. La4 Kxa2 3. Tf3 Ka1 4. Ta3#
retro try: 1. Lg8?? h6 2. Tf7 Kxa2 3. Ta7#
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Keywords: No legal last move for Black, Minimal
Genre: Retro, 3#
Computer test: C+ Popeye 4.61
FEN: 8/7p/8/7P/8/1B6/P1P2R2/k1K5
Reprints: RA14 diagrammes 15 06/1975
Input: Gerd Wilts, 1995-06-03
Last update: A.Buchanan, 2022-11-27 more...
12 - P0003817
Jean Oudot
Nation Belge 1956
P0003817
(14+12) C+
#2
1. cxd6ep
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paul: Since the wB couldnt leave c1, the captured piece on b6 is the promoted wPh2. If last black move was f7-f5, then h-Pawn captured four pieces to promote on d8, among which bRh8, impossible. Thus, the h-Pawn could only have been promoted from f7 and therefore d7-d5 remains as the last move. (2011-07-02)
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Keywords: En passant as key
Genre: Retro, 2#
Computer test: C+ Popeye 4.61
FEN: qrRNkb2/PpQ1p1pp/1pp1R3/2PpKpP1/6N1/7B/1P1PPP2/8
Reprints: RA15 diagrammes 15 06/1975
(51) Mat Plus 12 10-12/2009
Input: Gerd Wilts, 1995-06-03
Last update: A.Buchanan, 2022-11-27 more...
13 - P0003839
Radu Dragoescu
RA44 diagrammes 23 09-10/1976
Jean Oudot gewidmet
P0003839
(16+16)
Wieviele Figuren muß man entfernen, damit die Stellung legal wird?
A.Buchanan: In each of the 4 pairs of adjacent files, one cross-capture suffices. So removing 8 officers is enough. However, they need to be an even number from each side.
However it's possible to do better by removing pawns: wPadgh bPcf = 6 units. Now wPaxb bPcxb wPdxe bPfxe.
Is it possible with 5 or less? (2022-03-17)
Bob Baker: I find it interesting that the composer specified piece removals, since six captures suffice. Does that imply that 5 or less is possible by removing pieces? (2023-04-27)
A.Buchanan: I think the German term "Figuren" (like the English "pieces") can have two senses, either all 16 pieces or just the officers. Wikipidie.ge uses the phrase "im engeren Sinne" = "in the narrower sense" to distinguish. But maybe a native German speaker can be more authoritative here:

Auf dem Schachbrett befinden sich zu Beginn einer Partie insgesamt 32 Schachfiguren (auch als Steine bezeichnet), 16 weiße und 16 schwarze. Beide Spieler (bezeichnet als Weiß und Schwarz oder als Anziehender und Nachziehender) haben je folgende Schachfiguren zur Verfügung:
- acht Figuren im engeren Sinne:
= den König
= die Dame und zwei Türme (Schwerfiguren)
= zwei Springer und zwei Läufer (Leichtfiguren)
- acht Bauern (2023-04-27)
A.Buchanan: And the Originaldforderung would have been in French, surely (2023-04-27)
Bob Baker: A stipulation might have been "Reach the position with the greatest number of pieces still on the board." A position with six fewer men can be reached with no removals from the initial array. It would be a harder problem than if pieces can just be taken off the board. But maybe allowing removals could make 5 or less possible. (2023-04-28)
A.Buchanan: Not quite sure what you are saying. Generally, capturing pawns is more efficient than capturing officers to get pawns past one another, but here we have no doubled pawns. If we have a solution with 5 units including a missing officer, then might as well promote a pawn to replace it. So we can reduce our search to positions where 5 pawns have been removed (2023-04-28)
Bob Baker: I'm suggesting if six really is the answer, it would be a better (more challenging) problem to require a proof game with no removals except by capturing. (2023-04-28)
Bob Baker: Also, I think this may have been the composer's intent, but the stipulation was misunderstood as allowing pieces to be taken off the board without being captured. (2023-04-28)
Bob Baker: I just realized that the misunderstanding of the composer's intent was on my part, so all my previous comments should be disregarded. (2023-04-28)
Carot: I understand that all 16+16 figures are meant.
So for the e-row 1. e4 e5 2. e4f5 e5f4 3. f5e6 f4f3
This is illegal, so only the e-line is considered, one e-pawn too many to reach the given position legally.

I am just a beginner in Chess, but i think en passant is useable and therefore maybe less then 8 pieces have to removed, but i tried an hour and found no way for optimisation. :(..

I would be happy about an idea. Please share. I go study pawn endgames now.
I am happy to found this site and many old combinations of Max Lange. (2023-04-28)
Bob Baker: Play this game for a quick way to remove six pieces.
1. a4 a5 2. b4 b5 3. c4 c5 4. d4 d5 5. e4 e5 6. f4 f5 7. g4 g5 8. h4 h5 9. axb5
hxg4 10. bxc5 gxf4 11. exf5 dxc4 12. b6 a4 13. c6 a3 14. d5 c3 15. d6 e4 16. f6
e3 17. h5 f3 18. h6 g3 (2023-04-29)
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Keywords: Remove pieces, Illegal position
Genre: Retro
FEN: rnbqkbnr/8/PPPPPPPP/8/8/pppppppp/8/RNBQKBNR
Input: Gerd Wilts, 1995-06-03
Last update: A.Buchanan, 2023-04-27 more...
14 - P0003969
Roger Diot
André Hazebrouck

RA163 diagrammes 73 09-10/1985
P0003969
(12+12)
#1
KBP?
Henrik Juel: 1... Txa2#, not 1.Dxb2? -1.Td1xSe1 Sf3 -2.Te1 h7 -3.Td1 Sh4 -4.Te1 Sf5 -5.Td1 Sh6 -6.Te1 Sg4xPh6 -7.Td1 Sf2 -8.Te1 Sd1 -9.h5 Kc1 -10.h4 Ld3 -11.h3 Kc2 -12.h2 Sf2 -13.Td1, retract sLd3 to c8, b7-b6, etc. Black promoted b2-b1=T and f2xTg1=L. The shortest proof game is rather long! (2003-12-19)
Moldenhauer: Histogramm Stelvio 1.2 128/0k bei BP 37.0.
Kein Histogramm bei BP 36.0, BP 36.5. Computerprüfung wird sehr lange dauern
da eine 5+1 auch nach 5 Stunden noch nicht fertig ist! Nur 49 Strategien sind
unter 5+1. Vielleicht kommt aber das "cooked" früher dazwischen. (2023-05-10)
comment
Keywords: Whose move?, Non-standard material, Non-Unique Proof Game
Genre: Retro
FEN: N7/2Pp2p1/1prp3p/b1p5/1b6/PPP5/QrkPP1P1/Kb2RB2
Input: Gerd Wilts, 1995-06-03
Last update: A.Buchanan, 2014-05-21 more...
15 - P0004066
S. N. Ravishankar
2069 diagrammes 89 04-06/1989
P0004066
(2+1)
#1 vor 6
VRZ, Typ Proca
R: 1. Ke2xLf1 ~ 2. Kd3xLe2 ~ 3. Kc4xLd3 ~ 4. Kb5xLc4 ~ 5. Kb6-b5! ~ 6. Sa6xSb8, dann 1. Sc7#
play all play one stop play next play all
S N Ravi Shankar: This problem is not mine. (2019-01-02)
Mario Richter: My first guess for the solution was:
R: 1. Ke2xLf1 2. Kd3xLe2 3. Kc4xLd3 4. Kb5xLc4 5. Ka6xLb5 Lc6-b5+ 6. Sd7xLb8, dann 1. Sb6#, but that doesn't work because of 5. ... Ld7-b5+!
Does someone see (or know) the correct solution? (2019-01-03)
Henrik Juel: No, because with 1... Lh3-f1+, 5.Ka6-b5 thr. 6.Sd7xLb8 fails similarly on 5... Ld7-h3 (2019-01-03)
S N Ravi Shankar: Does adding a black knight on e6 cure? 1. Ke2xLf1 2. Kd3xLe2 3. Kc4xLd3 4. Kb5xLc4 5. Ka6-b5! followed by 6. Sd7xLb8 and now 1. Sb6#. (2023-02-20)
S N Ravi Shankar: The problem appears to be sound. 1.Ke2xLf1 2.Kd3xLe2 3.Kc4xLd3 4.Kb5xLc4 5.Kb6-b5! followed by 6.Sa6xSb8 and now 1.Sc7#. (2024-02-18)
A.Buchanan: WinChloe also gives the same composer. A curious situation, but at least the problem attributed to you appears to be sound! (2024-02-19)
Adrian Storisteanu: Above the "diagrammes" diagram there is: R. SHANKAR, Inde. In the volume index, under RETROS: this is the only problem of a composer named (just) "SHANKAR" (one original), while "RAVI SHANKAR" is a different author (with two originals). (2024-02-20)
A.Buchanan: I suggest that S.N.Ravishankar check the reaponse to the query (A='Shankar' or a='Ravishankar') AND NOT A='Shankar Ram, Narajan' as there are many other similar retros which are attributed to Ravishankar. If he can state here which ones are not his, I will happily modify the data. (2024-02-21)
more ...
comment
Keywords: Defensive Retractor, Type Proca, Rex solus (s), Aristocrat, Minimal, Miniature
Genre: Retro
FEN: kN6/8/8/8/8/8/8/5K2
Input: Gerd Wilts, 1995-06-03
Last update: A.Buchanan, 2024-02-21 more...
16 - P0006162
Eric Angelini
3240 diagrammes 112 01-03/1995
P0006162
(7+16)
BP in 23,0
Wo und durch wen wurde der wLf1 geschlagen?
1. f4 h6 2. f5 Th7 3. f6 exf6 4. d4 Sa6 5. d5 c6 6. d6 Lxd6 7. g4 Lc7 8. h4 d6 9. h5 Lxg4 10. Lh3 Lxh5 11. Lc8 Se7 12. e4 Sf5 13. e5 Ke7 14. e6 fxe6 15. c4 Lf7 16. c5 Sxc5 17. b4 g6 18. b5 Sg7 19. b6 axb6 20. a4 Dd7 21. a5 Ta7 22. a6 bxa6 23. Lb7 Sxb7
play all play one stop play next play all
Moldenhauer: Computerprüfung: C+ da NUPG Stelvio 1.11 47 Sekunden.
Keine Lösung: BP22.0, BP 22.5.
Auf b7 wird der wLf1 durch Sb8 der auf später auf c5 steht geschlagen. (2023-03-28)
comment
Keywords: Non-Unique Proof Game
Genre: Retro
FEN: 8/rnbqkbnr/pppppppp/8/8/8/8/RNBQK1NR
Input: Gerd Wilts, 1995-07-19
Last update: A.Buchanan, 2012-04-08 more...
17 - P0006477
Thierry Le Gleuher
3350 diagrammes 114 07-09/1995
P0006477
(11+16) C+
BP in 26,0
1. Sf3 a5 2. Sd4 a4 3. Sb3 axb3 4. a4 Ta6 5. a5 Td6 6. a6 Txd2 7. a7 d5 8. a8=S Ld7 9. Sb6 cxb6 10. c4 b5 11. c5 Db6 12. c6 Dd4 13. c7 Lc6 14. c8=S Sd7 15. Sd6 exd6 16. e4 Se7 17. e5 Sc8 18. e6 Se5 19. e7 Kd7 20. e8=S Ke6 21. Sf6 gxf6 22. g4 Lg7 23. g5 Te8 24. g6 Lh8 25. g7 Te7 26. g8=S Sf3+
play all play one stop play next play all
Brilliant cavalcade in a very clear construction.
Moldenhauer: Ergänzung: C+ Stelvio 8 Sekunden.
Keine Lösung: BP 25.5. (2023-06-24)
comment
Keywords: Ceriani-Frolkin Theme (SSS), Unique Proof Game, Promotion
Genre: Retro
Computer test: Resolution time : 18 mn 14.45 s., Natch 2.3 Copyright (C) 1997,98,99,2001,2002,2003,2004 Pascal Wassong
FEN: 2n3Nb/1p2rp1p/2bpkp2/1p1p4/3q4/1p3n2/1P1r1P1P/RNBQKB1R
Input: Gerd Wilts, 1996-06-16
Last update: James Malcom, 2023-06-24 more...
18 - P0008449
Jean-Michel Trillon
3574 diagrammes 118 07/1996
P0008449
(6+4)
Orthorekonstruktion in 12.5
Echecs sentinelles
Weiß am Zug
1. e5 Kb8 2. e6 Ka8 3. e7 Kb8 4. e8=T Ka8 5. Th8 Kb8 6. Th1 Ka8 7. Te1 Kb8 8. Te2 Ka8 9. Te1[+wBe2] Kb8 10. Tb1+ Ka8 11. Tb8+ Kxb8 12. e4 Ka8 13. e3
play all play one stop play next play all
Frank Müller: Welche Bauern sind Berolinabauern? (2010-08-15)
Joost de Heer: No berolina pawns.
Solution: 1.é5 Rb8 2.é6 Ra8 3.é7 Rb8 4.é8=T Ra8 5.Th8 Rb8 6.Th1 Ra8 7.Té1 Rb8 8.Té2 Ra8 9.Té1(+é2) Rb8 10.Tb1+ Ra8 11.Tb8+ R×b8 12.é4 Ra8 13.é3 (2023-08-27)
A.Buchanan: Quite delightful. Can it be validated in Jacobi as an A-B PG? (2023-08-28)
comment
Keywords: Sentinels, Ortho-reconstruction
Genre: Retro, Fairies
FEN: k1b5/3p4/3P1p2/5P2/K3P3/4P1P1/8/8
Input: Gerd Wilts, 1996-10-03
Last update: James Malcom, 2023-08-27 more...
19 - P0009092
Thierry Le Gleuher
3631 diagrammes 119 10/1996
P0009092
(10+15) C+
BP in 27,5
1. Sf3 d5 2. Se5 Le6 3. Sc4 dxc4 4. h4 Dd4 5. Th3 Sd7 6. Tb3 cxb3 7. a3! Lc4 8. Ta2 bxa2 9. a4 axb1=S 10. a5 Sc3 11. a6 Sxd1 12. axb7 Se3 13. b8=L Sf5 14. Kd1 Sxh4 15. Ke1 f5 16. Kd1 Kf7 17. Ke1 Kg6 18. Kd1 Kh5 19. Ke1 g6 20. Kd1 Lg7 21. Ke1 Le5 22. Kd1 Sgf6 23. Ke1 Td8 24. Kd1 Sf8 25. Ke1 Td5 26. Kd1 Ta5 27. Ke1 Dc5 28. Kd1
play all play one stop play next play all
Moldenhauer: Computerprüfung: C+ Stelvio 1.11 4 Sekunden.
Keine Lösung: BP 26.5, BP 27.0. (2023-03-30)
comment
Keywords: Unique Proof Game, Pendulum (K x15)
Genre: Retro
Computer test: Stelvio 1.11
FEN: rB3n2/p1p1p2p/5np1/r1q1bp1k/2b4n/8/1PPPPPP1/2BK1B2
Input: Gerd Wilts, 1998-06-26
Last update: James Malcom, 2023-05-02 more...
20 - P0503025
Norman Alasdair Macleod
R. Tony Lewis

diagrammes 03-04/1982
2. Preis
6. Thematurnier
P0503025
(3+5) C+
h#2
4.1...
1) 1. Kc7 e8=D 2. Db6 Dfe7#
2) 1. Kb7 e8=L 2. Ka8 Lc6#
3) 1. Kd7 e8=T 2. Dc6 De7#
4) 1. Dc4 e8=S 2. Kd5 Dd6#
play all play one stop play next play all
(KSp)
t/Allumwandlung, u/61103, t/sK-Korrespondenz
A.Buchanan: A pity that 1 & 3 both end with 2...Dfe7# (2023-03-14)
more ...
comment
Keywords: Allumwandlung, Figurenspiel
Genre: h#
Computer test: (Popeye C-Version 3.52 (2048 KB))
FEN: 5Q2/n3P3/2k1q3/7b/4p3/K7/8/8
Reprints: feenschach 61 08/1982
13 The Modern Helpmate in two 1989
Input: Erich Bartel, 1996-09-03
Last update: A.Buchanan, 2023-03-14 more...
21 - P0506144
Felix Alexander Sonnenfeld
Ricardo de Mattos Vieira

1895 diagrammes 85 04-06/1988
P0506144
(4+5) C+
h#2
3.1...
1) 1. Sb5 Sd5+ 2. Kf5 Se7#
2) 1. Sc6 Sc4+ 2. Kf5 Sd6#
3) 1. Sc8 Sc2+ 2. Kf5 Sd4#
play all play one stop play next play all
Yuri Bilokin: you can see 1...Sc2+ 2.Kf5 Sd4#
1...Sc4+ 2.Kf5 Sd6#
1...Sd5+ 2.Kf5 Se7# (2023-06-26)
comment
Keywords: Dual avoidance, Tempo Move
Genre: h#
Computer test: (Popeye C-Version 3.52 (2048 KB))
FEN: 8/n7/4p1p1/4P3/4kb1K/4N3/8/4R3
Input: Markus Manhart, 1997-01-06
Last update: hpr, 1999-08-29 more...
22 - P0506163
Wenelin Alaikow
1965 diagrammes 87 10-12/1988
P0506163
(3+8) cooked
h#3
2.1...
1) 1. Da5 Tb5 2. Sd7 Tb6 3. Df5 Ld5#
2) 1. Da4 Lb5 2. Ld6 Lc4 3. Dd7 Te5#

NL:
1. Sa6 Txb5 2. Sc7 Tb6 3. Kd6 La4#
play all play one stop play next play all
Yuri Bilokin: Yuri Bilokin & Wenelin Alaikow correction a4=a1(-bPd), then +bPa4, +bPe5, +bPe6, bPg3-h2 8/8/4p3/4p3/pp2b3/2B1kn2/1q1R3p/1n1K4 (3+10) h#3 2.1...

1.Qa1 Bb2 2.Bd3 Bc1 3.Qd4 Re2#
1.Qa2 Rb2 2.Sd4 Rb3 3.Qf2 Bd2# (MM)
Ambush (wB). Ambush (wR). Anticipatory unpin
AntiZielElement (W1, line obstruction) × 2
Exchange of functions (wRd2/wBc3, Mating battery firing / Rear piece of mating battery + Line opening)
Play on the same square (W1, 2). Reciprocal batteries. Wigwag (bQ) × 2
Model mate × 1. Battery mate × 2. Double-check mate × 2 (2023-05-20)
comment

Genre: h#
FEN: 8/1p2b3/2B1knp1/1q1R4/1n1K4/3p4/8/8
Input: Markus Manhart, 1997-01-06
Last update: hpr, 1999-08-29 more...
23 - P1009052
Nikolay S. Zinovyev
4508 diagrammes 07/2000
P1009052
(4+3)
#12 *
(N. Sinowjew). 1.- Le4 2.Shf7 Lg6 3.Se5 Le4 4.Sc4 L beliebig 5.Se3 Le4 6.f3! L:f3 7.Sf5#; Um dieses Lösungsspiel zu erreichen tauschen die beiden wSS ihre Funktionen: 1.Sg8! Lf5 2.Sf6 Le6 3.Sfe4 Lc4 4.Sc3 Lb3 5.Se2 Lc2 6.Sg1 Le4 7.Sf7 Lg6 8.Se5 Le4 9.Sc4 L beliebig 10.Se3 Le4 11.f3! L:f3 12.Sf5#. KHS: Das Duell von wS gegen sL ist eigentlich Thema einer Materialstudie und nicht eines künstlerischen Schachproblems!
play all play one stop play next play all
Anton Baumann: DL nach ... 6.Sg1 Ld1: 7.Sf7 Lc2 8.Se5 Le4 9.Sc4 ...
oder 7.Se4 Lc2 8.Sd2 Ld1(Le4) 9.Sf1,Sc4 .. (2023-03-03)
more ...
comment
Keywords: Multiple publication
Genre: n#
FEN: 8/8/6bN/6Np/5K1k/8/5P2/8
Reprints: 11133 Die Schwalbe 189 06/2001
Input: Gerd Wilts, 2003-07-01
Last update: Frank Müller, 2010-03-13 more...
24 - P1012015
Henri Nouguier
Jean-Claude Gandy
Jean Claude Dumont

diagrammes 1975
Lob
P1012015
(12+8) C+
#2
1. Sg5? droht 2. Sxf7#
1. ... f5!

1. dxc6ep! droht 2. Kb6#
1. ... bxc6+ 2. Kxc6#
play all play one stop play next play all
Le Fnf1 provient de la promotion du PNh7 (2 prises) après capture à domicile du Fbf1 (1 prise). bxc5, dxc5 ou dxe6 comme dernier coup N sont à rejeter puisqu'ils nécessiterait 2 prises supplémentaires. Le RN n'a pu venir de d6 au coup précédent car cela impliquerait exf8:F+ comme dernier coup B. Dans ce cas les PB auraient effectué 9 prises or il ne manque que 8 PN. Le RN n'a pu venir de f4 ou de f5 après fxe4 car la position des PB e2, f3 et g2 rendrait inexpli- cable la présence simultanée de la TB en f2 et du FN en f1. Le PNe6 ne vient pasde e7 car le FB n'aurait pu accéder à f8 et le PNc5 ne vient pas de c6 à cause de l'+ non paré au RB.
No. 1111 HN
Correction of P0003822
A.Buchanan: Odd that the correction has fewer composers than the cooked original (2023-05-27)
HENRI: To be corrected :
The third author Jean-Claude Dumont must be add as mentioned in the award 1975-1976 page 539 diagrammes n° 31 jan - feb 1978. (2023-05-30)
more ...
comment
Keywords: En passant as key
Genre: Retro
Computer test: HC+ Popeye 4.61 and (french) analysis
FEN: 5B2/1p3ppN/4p3/RKpPk3/3pP3/3P2P1/2P1PRP1/5b2
Input: Henri Nouguier, 2004-01-11
Last update: A.Buchanan, 2023-05-30 more...
25 - P1012052
Henri Nouguier
diagrammes 2004
P1012052
(9+15)
shc#6
1. dxc3ep 2. Kxb5 3. Kc6 4. Kd7 5. Ke8 6. 0-0 Txg7#
play all play one stop play next play all
Un des PNd a pris 1 pièce blanche. pour venir de e7. Donc les PB b, c et d ne peuvent se croiser. Le PBg6 ne peut venir de f5 car il faudrait 2 prises noires! Seule reste le dernier coup blanc 0... c2-c4 Ceci implique que le FNb1 est issue de promtion ! C'est le PNb7, il aurait pris 2 pièces blanches. Les PNg5 et h5 ont pris 2 pièces blanches.
No. 11661 HN
A.Buchanan: “Obvious promotion” is intended to refer to something visible in the initial diagram position, not what is reached during series play (2022-09-14)
A.Buchanan: Similarly “non-standard material (2022-09-14)
more ...
comment
Keywords: Seriesmover, Consequent, En passant as key, Promotion in the retro play (sLb1), Castling, Valladao Task
Genre: Retro, Fairies
FEN: 7r/5pnR/5PnR/1Pp2ppq/1kPp4/p2P4/P2pP3/Kbb4r
Input: Henri Nouguier, 2004-01-11
Last update: Mario Richter, 2022-09-14 more...
26 - P1016743
Romeo Bedoni
5 diagrammes 04-06/2003
P1016743
(5+2)
R#3
1. a8=T+ K beliebig 2. b8=T+ K beliebig 3. d8=T Dxc6#
play all play one stop play next play all
Rx351
Anton Baumann: C+ Alybadix (2023-09-28)
comment

Genre: r#
FEN: 2K5/PP1P4/2P4q/8/8/8/8/k7
Input: Selbstmatt-Miniaturen/Reflexmatt-Miniaturen, 2004-05-01
Last update: Gerd Wilts, 2004-05-01 more...
27 - P1016744
Romeo Bedoni
6 diagrammes 04-06/2003
P1016744
(4+3)
R#3
1. g8=L+ Kd6 2. b8=L+ Kc6 3. La7 Lc8#
{ UL} 3. Db5,Dd5,Dc1#!
play all play one stop play next play all
{ UL}
Rx352
Anton Baumann: mögliche Korrektur: -wDg5, +wTh5, +wLh4 (2023-09-22)
comment

Genre: r#
FEN: 8/1P1b2P1/Kp2k3/6Q1/8/8/8/8
Input: Selbstmatt-Miniaturen/Reflexmatt-Miniaturen, 2004-05-01
Last update: Gerd Wilts, 2004-05-01 more...
28 - P1025401
Evgeny A. Vaulin
diagrammes 1992
2. Preis
P1025401
(10+7)
#2

BS Problemid: 10279
Authors: Slesarenko, Anatoly
Vaulin, EA
Sources: FIDE Album (1992-1994) 2001
Album Russia (1992-1994) 2000
Years: 1992
SCHRECKE: C+, popeye 4.87
1. Tc5! droht 2. Lg5#
1. ... Dxf5,Dd5 2.Se2#
1. ... Ke3 2. Sd5# (2023-03-06)
comment
Keywords: Brian Stephenson Collection (10279)
Genre: 2#
FEN: 8/2p5/Q3PB2/4RP2/4qkpK/R1N5/3p1p1N/1B5b
Input: Brian Stephenson, 2004-08-12
29 - P1029942
Fritz Hoffmann
Stefan Dittrich
Dieter Müller

diagrammes 1976
P1029942
(13+10)
#2

1. cb5? (2. Sa4) ...Sb6/d4/Dd4 2. cb6/Se4/Ld4, ...Lf4!; 1. cd5? (2. Se4) ...Sd6/Sb3/De5 2. cd6/Tb3/De5, ...Le3!; 1. Dh7! (2. Dd3) ...bc4/dc4 2. Sa4/Se4, ...Dh7 2. Ld4
SCHRECKE: C+, popeye 4.87 (2022-09-28)
comment
Keywords: Brian Stephenson Collection (14840)
Genre: 2#
FEN: 2nr3q/2Q4p/KN2P2b/PpPp4/2P3R1/2k3N1/3pPB2/nR1B4
Input: Brian Stephenson, 2004-08-12
Last update: Felber, Volker, 2019-11-21 more...
30 - P1030096
Milan Velimirovic
diagrammes 1978
1. Preis
P1030096
(13+3)
#2

BS Problemid: 14994
Authors: Velimirovic, Milan
Sources: Chess Wizardry: The New ABC of Chess Problems 1996
Years: 1978
Sally: 1.Tde5?(A)droht 2.d5; 1.-Df7!x)1.Le5?(B)droht2Td6;1.Txa8 (y)
1. Te6! (droht 2. Le7#,1. -Df7(x),2. Tde5# (A). 1. - Txa8(y),2. Le5#(B). 1. - Tc8, 2. Le5#/Le7#/Lf8#.

1 - Tb8,2. Bxb8S#/Le5#7Le7#/Lf8#. 1. - Te7, 2. Lxe7#.
1. - Txe6, 2. Bc8D/T#. 1. - Dg4, 2. Le7#. 1. - Dg6, 2. Tde5#
Le7#. 1. - Sxf5. 2. Txf5. Wladimirow - Thema.
S. 53, Nr.7: 3. Int. Pr. T. 25 Jahre Sächsische Z. 1983.
Nr. 127 S. für Nußknacker (F. Chlubna 1994). (2011-11-23)
Walter Lindenthal: ... in übersichtlicher Darstellung:
Wladimirow - Thema:
1.Tde5? (A) droht 2.d5; 1. - Df7! (x)
1.Le5? (B) droht 2.Td6; 1. - Txa8! (y)
1.Te6! (C, droht 2.Le7#),
1. - Df7 (x) 2. Tde5# (A).
1. - Txa8 (y) 2. Le5#(B).

Sowie vollständig (inkl. Nebenvarianten):
1.Te6...
1. - Tb8 2.c7xb8=S#/Le5,e7,f8#.
1. - Td8 2.c7xd8=S#.
1. - Tc8,f8,g8,h8 2.Le5,e7,(x)f8#.
1. - Te7 2.Lxe7#.
1. - Txe6 2.c8=D/T#.
1. - Dg4,h1,h3 2.Le7#.
1. - Dg5,6/h2,4,6,7,8 2.Tde5#/Le7#.
1. - Dxf5 (korr. bisher: Sxf5) 2.Txf5#.
1. - Dxf3 2.Le7#. (2023-02-14)
comment
Keywords: Brian Stephenson Collection (14994)
Genre: 2#
FEN: N3r3/2P5/P1kB1N2/2PR1P1q/K2PRP2/5B2/8/8
Input: Brian Stephenson, 2004-08-12
31 - P1032881
Claude Wiedenhoff
diagrammes 1980
P1032881
(12+10) C+
#2
1. Tc5? Lxc8! 1. Tc6? Dc4!

1. Txc7! droht 2. f4#
1. ... Lc1 2. Tc6#
1. ... Dd3 2. Tc5#
1. ... Lxd5 2. Te7#
play all play one stop play next play all
more ...
comment
Keywords: Brian Stephenson Collection (17792), Zagoruiko (3x3), double-check mate, Capture key
Genre: 2#
Computer test: SCHRECKE: popeye 4.87
FEN: 1BN2N2/1pp5/q3bp2/3Pkp2/R2p3n/b4PP1/B1R1P3/1Q5K
Reprints: 199a Michael Keller. Ein Meister der Schachkomposition [Chlubna] , p. 104, 1994
17b Schach mit Partner , p. 53, 1999
Input: Brian Stephenson, 2004-08-12
Last update: Dieter Berlin, 2024-02-15 more...
32 - P1045248
Jacques Rotenberg
diagrammes 1978
2. Preis
P1045248
(13+6)
#2

BS Problemid: 30256
Authors: Rotenberg, Jacques
Sources: Dutch Solving Championship 2001
Years: 1978
J. Rotenberg: 1.Cé7?,Cb4? blocus
mais 1…C×h2!

1.Td7? blocus
mais 1…C×é1!

1.Cd3? blocus
mais 1…C×f7!

1.Fg1? blocus
mais 1…C×ç6!

1.Td2! blocus
1…R×é3 2.Té2‡
1…Cé~ 2.D×f3‡
1…Cf~ 2.D×é5‡

"simple" Zappas twice (2007-03-02)
SCHRECKE: C+, popeye 4.87 (2022-12-31)
Jacques Rotenberg: "simple" Zappas :
a square around the black king (a flght square) is controlled three times by white, however white cannot remove any of these controls (2024-02-01)
comment
Keywords: Brian Stephenson Collection (30256)
Genre: 2#
FEN: 8/2K2R2/1pN1PQp1/1B1Pn1p1/4k1P1/4Pn2/2P1R2B/4N3
Input: Brian Stephenson, 2004-08-12
33 - P1053403
Günther Jahn
diagrammes 1989
P1053403
(3+6)
#4

BS Problemid: 38446
Authors: Jahn, Gunther
Sources:
Years: 1989
Rosalie Fay: 1. Lh3 (droht 2. Db1) Lxh3 2. Df2 zz Lg2 3. De1+ Lf1 4. Dxf1#;

1. ... Ld3 2. Dd4 f2 3. Dxd3 ~ 4. Df1#;
2. ... Le4+ 3. Dxe4 Kg1 4. De1#;
2. ... Lc2/Le2 3. Da1+ Lb1/Ld1 4. DxL#
Sacrifice (L)
C+ Popeye Windows-64Bit v4.69 (2023-12-31)
comment
Keywords: Brian Stephenson Collection (38446)
Genre: n#
FEN: K1B5/8/1Q6/8/5p1p/5p2/7p/5b1k
Input: Brian Stephenson, 2004-08-12
34 - P1053504
Edmond Bernard
diagrammes 1976
Informalturnier
Lob
P1053504
(11+3) C+
#2
1. Sd5? droht 2. Sf6# 1. ... Kxd5!
1. Sd7? droht 2. Sf6# 1. ... Kd5? 2. Lb7# 1. ... Kxf5!

1. Sa4! Kd5 2. Lb7#
1. ... Sa3 2. Sac3#

1. ... Sxb3 2. Te3# 2. Td4?
1. ... Sc4,Sf1 2. Td4# 2. Te3?
1. ... Sf3 2. Sg3# 2. Td4? 2. Te3?
play all play one stop play next play all
more ...
comment
Keywords: Brian Stephenson Collection (38547), Herlin, Theme B2, theme B1 (Somov)
Genre: 2#
Computer test: SCHRECKE: popeye 4.89
FEN: 2B5/7K/1N6/2P2P2/4kP2/1P5R/3nN3/1nBR4
Reprints: 12 Kunstschach in der Schweiz , p. 15, 1980
Input: Brian Stephenson, 2004-08-12
Last update: Dieter Berlin, 2023-11-13 more...
35 - P1054865
Jaques Fulpius
diagrammes 1974
P1054865
(10+13)
#2
1. Kxe5! droht 2. Lxc2# 1. ... droht 2. S6d8#
1. ... Da5,Dc5,Ta5 2. Sc5#
1. ... Db8,Db7,Lb8+ 2. Sc7#
1. ... Db2,Dd4,a1=D+ 2. Sd4#
1. ... De3,Te3,e4,dxe1=D,fxe1=D+ 2. Le4#
1. ... Sd3+ 2. Lxd3#
play all play one stop play next play all
Henrik Juel: many threats and duals (2023-11-13)
comment
Keywords: Brian Stephenson Collection (39914), Capture key, Provoked check, discovered checkmate, Doppeldrohung
Genre: 2#
FEN: 6RR/b2Q1P1B/1qp1NP2/4pK2/2r2p2/r5Bk/p1pp1p2/2n1N3
Reprints: 22 Kunstschach in der Schweiz , p. 21, 1980
Input: Brian Stephenson, 2004-08-12
Last update: Dieter Berlin, 2023-11-13 more...
36 - P1118708
Eligiusz Zimmer
diagrammes 07/1998
P1118708
(5+2)
#2
1... . Ta7 2. Tc8;
1. Kb6! (Zugzwang) ... Td7,Ta7/Tc6+ 2. Tc8/Lc6, ... Tc8/Tb7+ 2. Tc8/ab7
play all play one stop play next play all
SCHRECKE: C+, popeye 4.87 (2023-09-18)
comment
Keywords: Miniature Collection (0238751)
Genre: 2#
FEN: k7/2rN4/P1R5/K7/B7/8/8/8
Input: Felber, Volker, 2010-09-11
Last update: Felber, Volker, 2010-09-11 more...
37 - P1122160
Vladimir Klipachov
diagrammes 1998
P1122160
(6+1)
#2
SCHRECKE: C+, popeye 4.87
1. Sc2! (Zugzwang)
1. ... Kxd5 2. Dc5#
1. ... Kb5 2. Sd6#
1. ... Kd3 2. Da6#
1. ... Kb3 2. Da2# (2023-04-29)
comment
Keywords: Miniature Collection (0238948)
Genre: 2#
FEN: 8/Q7/8/3P1B2/1Nk1N3/8/8/1K6
Input: Felber, Volker, 2010-09-11
Last update: Felber, Volker, 2010-09-11 more...
38 - P1122679
Georges Mirand
diagrammes 16 08/1975
TT 1. Platz
P1122679
(3+2) C+
#3
1. f8=T! Kb4 2. Tf5
play all play one stop play next play all
ZB3DT
more ...
comment
Keywords: Miniature Collection (0331846), Minimal (b), Miniature, under-promotion key (T), Stalemate avoidance
Genre: 3#
Computer test: SCHRECKE: popeye 4.89
FEN: 8/5P2/8/p7/k7/N7/1K6/8
Input: Zuncke/Bruder, 2010-09-11
Last update: Dieter Berlin, 2024-01-27 more...
39 - P1124829
Alexander W. Toger
4563 diagrammes 135 10/2000
P1124829
(4+2)
#6
1. Tf1
play all play one stop play next play all
Rosalie Fay: 1. Tf1 zz Ke5 2. Kc5 Ke6 3. Lc6 Ke5 4. Ld7 zz Ke4 5. Kd6 Kd4 6. Tf4#

3. ... Ke7 4. Kd5 Kd8 5. Kd6 ~ 6. Tf8#
C+ Popeye Windows-64Bit v4.69 (2023-12-19)
comment
Keywords: Miniature Collection (0332105)
Genre: n#
FEN: B7/8/8/8/1K1k4/3p4/3P4/7R
Input: Zuncke/Bruder, 2010-09-11
Last update: Zuncke/Bruder, 2010-09-11 more...
40 - P1128759
Eugenijus Bachvalovas
249 diagrammes 20 03/1976
P1128759
(3+3)
#5
b) wSf1->g8
a) 1. Se3;
b) 1. Sf6
play all play one stop play next play all
F4SL
Rosalie Fay: a) 1. Se3 (droht 2. Sd1) Lf3 2. Sc4 Le2 3. Sc6 L~ 4. Sa4 ~ 5. Sc3#
2. ... Ld5 3. Sa3 Lc4/Lc6 4. Sb1 ~ 5. Sc3#; 3. ... Le4 4. Sb5 ~ 5. Sc3#;
2. ... Lh1/La8/Lg2/Lb7 3. Sa3 Lc6/Lf1 4. Sb1 ~ 5. Sc3#; 3. ... Le4 4. Sb5 ~ 5. Sc3#;
2. ... Le4 3. Se5 Lb1/Lc2/Ld3/Lf5/Lg6/Lh7 4. Sc6 ~ 5. Sb4#; 3. ... La8/Lb7/Lc6/Ld5/Lf3/Lg2/Lh1 4. Sd3 ~ 5. Sb4#
Alleinunterhalter (S, l)

b) 1. Sf6 Lc6 2. Sg4 (droht 3. Sf2) Le4 3. Se5 Lb1/Lc2/Ld3/Lf5/Lg6/Lh7 4. Sc6 ~ 5. Sb4#
3. ... La8/Lb7/Lc6/Ld5/Lf3/Lg2/Lh1 4. Sd3 ~ 5. Sb4#
Alleinunterhalter (S, l)
C+ Popeye Windows-64Bit v4.69 (2023-12-21)
comment
Keywords: Miniature Collection (0332039)
Genre: n#
FEN: 8/8/8/8/4b3/1p6/kB6/2K2N2
Input: Zuncke/Bruder, 2010-09-11
Last update: Zuncke/Bruder, 2010-09-11 more...
41 - P1133974
Jaques Fulpius
diagrammes 77 05/1986
P1133974
(4+3) C+
#3
1. Ta2! f2 2. Tbb2 f1=D 3. Tc2#
play all play one stop play next play all
D19TT
more ...
comment
Keywords: Miniature Collection (0331882), Miniature
Genre: 3#
Computer test: SCHRECKE: popeye 4.89
FEN: 8/8/8/2K5/2p5/2k2p2/4R3/1RN5
Input: Zuncke/Bruder, 2010-09-11
Last update: Dieter Berlin, 2023-11-08 more...
42 - P1138334
Jaques Fulpius
diagrammes 77 05/1986
P1138334
(4+2) C+
#3
1. Te2! Lh3 2. T3f2
play all play one stop play next play all
D19TT
more ...
comment
Keywords: Miniature Collection (0331881), Aristocrat, Minimal (b), Miniature, Zugzwang-Goal
Genre: 3#
Computer test: Juel: Popeye 4.61
FEN: 2b5/8/8/8/8/5RN1/7R/3K2k1
Input: Zuncke/Bruder, 2010-09-11
Last update: Dieter Berlin, 2023-11-09 more...
43 - P1153804
Arkadij Muzyka
Mykola Parkhomenko

378 diagrammes 26 03/1977
P1153804
(6+1)
#4
1. g4 Ke6 (1... Kc6 2. Kd8 Kd5 3. g5) 2. g5 Kd5 3. Kd8
play all play one stop play next play all
A9SS7 mm
SCHRECKE: C+, Gustav 4.2b, Brute Force (2022-11-22)
comment
Keywords: Miniature Collection (0332041)
Genre: n#
FEN: 4K3/8/3N4/2Bk4/3P4/3N2P1/8/8
Input: Zuncke/Bruder, 2010-09-12
Last update: Zuncke/Bruder, 2010-09-12 more...
44 - P1165513
Pascal Wassong
1661 diagrammes 78 09/1986
P1165513
(4+1)
#2
1. Lc3! (Zugzwang) ... Kc4/Ke4 2. Dc6/De6
play all play one stop play next play all
A9-22- m
SCHRECKE: C+, popeye 4.87 (2022-11-15)
comment
Keywords: Miniature Collection (0238997)
Genre: 2#
FEN: 8/8/1Q3B2/3k4/8/6K1/8/2N5
Input: Felber, Volker, 2010-09-12
Last update: Felber, Volker, 2010-09-12 more...
45 - P1166905
Saturnin Limbach
288v diagrammes 22 07/1976
P1166905
(5+1)
#5
1. Th6
play all play one stop play next play all
T12T m
Originalfassung: 2u
Rosalie Fay: 1. Th6 (droht 2. Lc5) Ke4 2. Th3 (droht 3. Te3#) Ke5 3. Lc5 (droht 4. Te3#) Ke6 4. Th7 ~ 5. Te7#
C+ Popeye Windows-64Bit v4.69 (2023-12-21)
comment
Keywords: Miniature Collection (0332040)
Genre: n#
FEN: 8/B7/P1R5/4k1K1/2P5/8/8/8
Input: Zuncke/Bruder, 2010-09-12
Last update: Zuncke/Bruder, 2010-09-12 more...
46 - P1169353
Jaques Fulpius
diagrammes 1988
P1169353
(5+2) C+
#3
1. Tg7! f5 2. Thg6 f4 3. Tg2#
play all play one stop play next play all
D19TT
more ...
comment
Keywords: Miniature Collection (0303590), Minimal, Miniature
Genre: 3#
Computer test: SCHRECKE: popeye 4.87
FEN: 6K1/5p2/7R/8/6R1/7P/5N1k/8
Input: Felber, Volker, 2010-09-12
Last update: Dieter Berlin, 2022-09-07 more...
47 - P1188532
Vitaly Medintsev
6818 diagrammes 175 2010
P1188532
(5+9)
h#2
2.1...
1) 1. fxe2 Tf8 2. Lxc6 Lxc6#
2) 1. exf2 Dxe4 2. Sxe8 Tc8#
play all play one stop play next play all
SCHRECKE: C+, popeye 4.87 (2023-09-12)
comment
Keywords: Zilahi
Genre: h#
FEN: k3B3/n1nb4/2R5/1pK5/4p3/1p2pp2/4QR2/8
Input: Vitaly Medintsev, 2011-02-27
Last update: Alfred Pfeiffer, 2014-08-19 more...
48 - P1234309
Drago Biscan
1802 diagrammes 07-09/1987
P1234309
(13+10) cooked
s#3
1. c4 Sf4 2. Sxf4 d5 3. Sxd5 Lxd2#
1. c4 Sb4 2. Lxb4 d5 3. Lxd5 Lxd2#
1. c4 Sc3 2. dxc3 d5 3. cxd5 Ld2,Lxc3#
1. c4 Se3 2. dxe3 d5 3. exd5 Ld2,Lc3,Lb4,Lxa5#
1. c4 Sf6 2. Lc3 d5 3. cxd5 Lxd2#
1. c4 Se7 2. Tc7 d5 3. exd5 Lxd2#
1. c4 Sc7 2. Lxc7 d5 3. cxd5 Lxd2#
1. c4 Sb6 2. Lxb6 d5 3. Lxd5 Lxd2#
play all play one stop play next play all
Cook: 1. Ta8 droht 2. Lxd5 Lxd2#
1. Ta8 Sb4 2. Lxb4 d5 3. Lxd5 Lxd2#
1. Ta8 Sxc3 2. dxc3 nebst 3. Ld5 Ld2,Lxc3#
1. Ta8 Se3 2. dxe3 nebst 3. Ld5 Ld2,Lxc3#
usw.
milan: +wLa8 1.c4! M.Frelih (2023-09-01)
comment
Keywords: Grab, Knight's wheel (s)
Genre: s#
FEN: 1RR1Q3/1B4k1/3p2P1/B2n2P1/4P3/p1P4N/P2P1pp1/K3brrb
Input: Frank Müller, 2012-03-12
Last update: Frank Müller, 2012-03-12 more...
49 - P1237003
Viktor Sizonenko
5638 diagrammes 154 07-09/2005
P1237003
(5+2) C+
s#6
2.1...
1) 1. Lh5! Kb6 2. De6+ Kc7 3. Td7+ Kc8 4. Ta7+ Kd8 5. Dd6+ Kc8 6. Db8+ Txb8#
2) 1. Td8! Kb6 2. Tb8+ Ka6 3. Dc8+ Tb7 4. Ld7 Kb6 5. Dc5+ Ka6 6. Da7+ Txa7#
play all play one stop play next play all
Henrik Juel: C+ Popeye 4.61 also (2023-04-28)
comment
Keywords: Minimal (t), Miniature, Corner mate, Echo
Genre: s#
Computer test: Popeye WINDOWS-32Bit V4.37 (165224 KB)
FEN: K7/8/k7/1r6/1PQ3B1/8/8/3R4
Input: Frank Müller, 2012-04-15
Last update: Marcin Banaszek, 2023-05-05 more...
50 - P1267133
Camillo Gamnitzer
diagrammes 1997
2. Ehrende Erwähnung
P1267133
(13+11)
s#6

1. g7!
Anton Baumann: 1.g7! droht 2.Sg6+ fxg6 3.Te7+ Kd6 4.Da3+ Kc6 5.Dc5+ Txc5#
1. ... bxa2 2.Sa3 droht 3.Dxc3+ Txc3 4.Sc4+ Txc4#
2. ... Lxd3 3.Sc6+ bxc6 4.Td5+ cxd5 5.Lc7+ Kd4 6.Db6+ Tc5#
C+ Gustav 4.2a (2023-04-25)
comment

Genre: s#
FEN: 8/1p1RNp2/pB3pP1/K3kP2/P3P2R/1prP4/PQ3p2/1Nr1bb2
Input: Mario Richter, 2013-04-12
51 - P1267154
Camillo Gamnitzer
diagrammes 2000
P1267154
(11+14) C+
s#5
1. Th3! droht 2. Sf5+ Dxf5 3. Le6+ Ke4 4. Dd3+ Kf4 5. Dxf5 Lxf5#
1. ... gxh3 2. Ta3 De4 3. Le6+ Dd5 4. Lxd5 ... 5. Sf5+ Lxf5#
2. ... Df6 3. Se6+ Dxe6 4. Db4+ Kxd5 5. Td3+ Lxd3#
play all play one stop play next play all
more ...
comment

Genre: s#
Computer test: A. Baumann: Gustav 4.2a
FEN: 7B/5PN1/1p1Q4/1P1BP1pP/3k1qpR/1R2pp2/pp3prb/rb3K2
Input: Mario Richter, 2013-04-12
Last update: Dieter Berlin, 2024-02-14 more...
52 - P1404458
Garen Yacoubian
diagrammes 1974
P1404458
(9+6) C+
#3
1. Kd6? droht 2. Sd2# 1. ... f1=S!

1. Kc5! droht 2. Tf3 ... 3. Sg5#
1. ... f1=D 2. Kd6 Df4 3. Sc5#
play all play one stop play next play all
more ...
comment
Keywords: Block guiding, Holst promotion (sD,sS), Preplan
Genre: 3#
Computer test: Juel: Popeye 4.61
FEN: 8/8/2K1N3/4PP2/2N1k1Pp/3R4/2P1npP1/3nr3
Reprints: 135 Kunstschach in der Schweiz , p. 77, 1980
Input: Dieter Berlin, 2022-09-18
Last update: Dieter Berlin, 2022-09-18 more...
53 - P1406448
Hermann Weissauer
diagrammes 1988
Jean Zeller gewidmet
P1406448
(7+7) C+
#7*
* 1. ... Kb4 2. Te1 Ka5 3. Ta1+ Kb4 4. Tb1 Ka5 5. b4#

1. Lb3! Kb4 2. Ld1 Ka5 3. Lc2 Kb4 4. Te1 Ka5 5. Ta1+ Kb4 6. Tb1 Ka5 7. b4#
play all play one stop play next play all
more ...
comment
Keywords: ambush, Pawn mate, Tempo Move
Genre: n#
Computer test: Juel: Popeye 4.61
FEN: 8/1p6/bp4p1/kp2RpP1/3P1P2/3K4/1PB5/8
Reprints: M52 Knobeln Sie auch gern? [Pachl] , p. 174, 2009
Input: Dieter Berlin, 2022-12-04
Last update: Dieter Berlin, 2022-12-04 more...
54 - P1406524
Hermann Weissauer
diagrammes 1980
P1406524
(7+4) C+
#3
1. Ta4! e6 2. g4 Kxf4 3. Sd3#
1. ... Ke6 2. Ta7 Ke5 3. Txe7#
play all play one stop play next play all
more ...
comment
Keywords: Zugzwang-Goal, Vorausfesselung, pin-mate
Genre: 3#
Computer test: Juel: Popeye 4.61
FEN: 8/4p3/8/R1B1k3/1N2pR1K/4p1P1/4P3/8
Reprints: D136 Knobeln Sie auch gern? [Pachl] , p. 94, 2009
Input: Dieter Berlin, 2022-12-08
Last update: Dieter Berlin, 2022-12-08 more...
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