Die Schwalbe

583 problem(s) found in 5807 milliseconds (displaying 100 problem(s)). [COMMENTDATE>=20200919 AND NOT K='Hilfsrückzüger' AND NOT S='Los Angeles Times' AND K='Eindeutige Beweispartie'] [download as LaTeX]

1 - P0000108
Andrey Frolkin
6272 Die Schwalbe 111 06/1988
1. Lob
P0000108
(30+0) C+
Färbe die Steine!
BP in 19.0
1. h4 d6 2. Th3 Sd7 3. Tb3 Sdf6 4. Tb6 axb6 5. f4 Ta3 6. Kf2 Th3 7. a4 Th1 8. Ta3 Lh3 9. Tg3 Dd7 10. Tg6 hxg6 11. a5 Th5 12. a6 Ta5 13. h5 Ta1 14. h6 Da4 15. h7 b5 16. h8=T Sh7 17. a7 f6 18. a8=T+ Kf7 19. Ta7 Dd4+
play all play one stop play next play all
Henrik Juel: C+ by Natch 3.1 (16 min.)
The colored position has black Ta1,h1 and Pb5,g6, and white Ta7,h8, otherwise 'natural' (2018-12-07)
François Labelle: Henrik, did you really test all 2^30 possible colorings with Natch, or did you use human deductions to reduce the possibilities (making this HC+), or did you only test the intended coloring (making this a partial C+)? (2018-12-09)
Mario Richter: I do not think that it is necessary to check all 2^30 colorings, since the color of the pawns on files c,d,e and f is completely determined. This and more restrictions on the set of potentially possible colorings may be derived from insights presented in an article "Aggregierte Schlagbilanz" by Frolkin & Kornilov, feenschach 130, p.411ff. Since the mechanisms presented there can at least partially be implemented in a little computer program, even a "full C+" label for this problem is not out of reach ... (2018-12-10)
Henrik Juel: I only tested the intended coloring, Francois,
so the C+ label is not justifiable
In the other coloring proof games I write something like
The colored position was C+ by Natch

Mario is right, of course, in that not all colorings need testing; but still the number is very large
This genre is somewhat messy; at first I thought that the solver could determine the coloring, but this is clearly not the case; also, the intention is not
'color the men such that a correct proof game in 19 results' (2018-12-11)
A.Buchanan: Henrik: so what exactly should the stipulation be for clarity? (2018-12-12)
Henrik Juel: Pretty much as it is now, Andrew
Color the men
PG19 (2021-02-20)
comment
Keywords: Unique Proof Game, Colouring problem, Promotion (TT), Phoenix
Genre: Retro
Computer test: Natch 3.1 (16 min.)
FEN: 5BNR/RPP1PKPN/3P1PP1/1P6/3Q1P2/7B/1PPPPKP1/RNBQ1BNR
Reprints: 158 Shortest Proof Games 11/1991
Input: Gerd Wilts, 1995-06-03
Last update: James Malcom, 2022-02-08 more...
2 - P0000111
Andrey Frolkin
Leonid Lyubashevsky

6330 Die Schwalbe 112 08/1988
4. ehrende Erwähnung
P0000111
(28+0)
Färbe die Steine!
BP in 11.0
1. h4 f5 2. Th3 Kf7 3. Tb3 De8 4. Tb6 axb6 5. g3 Ta3 6. Lg2 Tc3 7. Lc6 dxc6 8. dxc3 Le6 9. Dd8 Lb3 10. axb3 Dd7 11. Ta8 Dd1+
play all play one stop play next play all
Henrik Juel: C+ by Natch 3.1
The colored position is 'natural' except for wTa8, wDd8, and sDd1 (2018-12-07)
paul: The problem is Jacobi+ with this code: stipulation PG 11 forsyth RS1Q1BSR/1PP1PKPP/1PP5/5P2/7P/1PP3P1/1PP1PP2/1SBQK1S1 ColorThePieces (2021-07-06)
comment
Keywords: Unique Proof Game, Colouring problem, Interchange
Genre: Retro
FEN: RN1Q1BNR/1PP1PKPP/1PP5/5P2/7P/1PP3P1/1PP1PP2/1NBQK1N1
Input: Gerd Wilts, 1995-06-03
Last update: James Malcom, 2022-02-08 more...
3 - P0000112
Dmitri W. Pronkin
Andrey Frolkin

6386v Die Schwalbe 113 10/1988
P0000112
(14+14) cooked
BP in 45.0
1. f4 g5 2. f5 g4 3. f6 g3 4. fxe7 gxh2 5. g4 d5 6. g5 d4 7. g6 d3 8. g7 dxc2 9. d4 f5 10. Lf4 c1=T 11. Lg3 Tc6 12. Dd3 Tg6 13. Da6 Sf6 14. g8=L c5 15. Lb3 c4 16. d5 Kf7 17. e8=T c3 18. Te4 c2 19. Ta4 c1=L 20. e4 Lf4 21. Sd2 h5 22. 0-0-0 h4 23. Te1 h3 24. Ld1 Th4 25. d6 L8h6 26. d7 Dh8 27. d8=T Le6 28. Tc8 S8d7 29. Tc2 Kg8 30. e5 Lf7 31. e6 Tf8 32. e7 Lb8 33. e8=S f4 34. Te7 f3 35. Se2 f2 36. Tg1 h1=S 37. b4 h2 38. Lh3 f1=S 39. b5 Sf2 40. b6 h1=L 41. bxa7 b6 42. a8=L Lb7 43. Th1 Lc8 44. Lag2 Se3 45. Lf1 S6e4
play all play one stop play next play all
Cook: 1. b4 c5 2. b5 c4 3. b6 c3 4. bxa7 d5 5. e4 d4 6. f4 d3 7. f5 dxc2 8. d4 g5 9. Lf4 c1=L 10. d5 g4 11. f6 g3 12. fxe7 gxh2 13. g4 c2 14. Lg3 Lf4 15. g5 c1=T 16. g6 Tc6 17. Dd3 f5 18. Sd2 h5 19. g7 Tg6 20. 0-0-0 Sf6 21. Te1 h4 22. d6 h3 23. g8=L Th4 24. Lb3 L8h6 25. Ld1 Kf7 26. d7 Dh8 27. d8=T Le6 28. Td4 Sbd7 29. e5 Tf8 30. e8=T Kg8 31. Tc8 Lf7 32. e6 b6 33. e7 Lb8 34. e8=S f4 35. Te7 f3 36. Se2 f2 37. Tg1 h1=S 38. Da6 h2 39. Lh3 f1=S 40. Ta4 Sf2 41. Tc2 h1=L
Michel Caillaud: cooked by Stelvio 0.93 :
1.b4 c5 2.b5 c4 3.b6 c3 4.bxa7 d5 5.e4 d4 6.f4 d3 7.f5 dxc2 8.d4 g5 9.Lf4 c1=L 10.d5 g4 11.f6 g3 12.fxe7 gxh2 13.g4 c2 14.Lg3 Lf4 15.g5 c1=T 16.g6 Tc6 17.Dd3 f5 18.Sd2 h5 19.g7 Tg6 20.0-0-0 Sf6 21.Te1 h4 22.d6 h3 23.g8=L Th4 24.Lb3 L8h6 25.Ld1 Kf7 26.d7 Dh8 27.d8=T Le6 28.Td4 Sbd7 29.e5 Tf8 30.e8=T Kg8 31.Tc8 Lf7 32.e6 b6 33.e7 Lb8 34.e8=S f4 35.Te7 f3 36.Se2 f2 37.Tg1 h1=S 38.Da6 h2 39.Lh3 f1=S 40.Ta4 Sf2 41.Tc2 h1=L... (2022-12-20)
more ...
comment
Keywords: Unique Proof Game, Move Length Record, Non-standard material, Castling, Promotion (tLTlTSsslL)
Genre: Retro
FEN: 1bb1Nrkq/3nRb2/Qp4rb/8/R3n2r/4n1BB/P1RNNn2/2KB1B1R
Reprints: 583 Ukrainisches Album 1986-1990
80 Shortest Proof Games 11/1991
Input: Gerd Wilts, 1995-06-03
Last update: Silvio Baier, 2023-03-02 more...
4 - 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+
play all play one stop play next play all
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)
more ...
comment
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...
5 - P0000172
Dmitri W. Pronkin
6991v Die Schwalbe 123 06/1990
P0000172
(13+13) cooked
BP in 24.5
1. Sc3 Sf6 2. Se4 Sd5 3. Sg5 Sc3 4. Sxh7 Sb1 5. Sxf8 Th5 6. h4 Tg5 7. hxg5 Kxf8 8. Th6 Kg8 9. Tb6 Kh7 10. g6+ Kh6 11. e4 Kg5 12. Lb5 Kf4 13. Ke2 Ke5 14. Kf3 Kd4 15. Kf4 Kc5 16. b4+ Kxb4+ 17. La3+ Kxa3 18. Df3+ Kb2 19. a4 Kc1 20. Se2+ Kd1 21. Sc1+ Ke1 22. Sd3+ Kf1 23. Sb2+ Kg1 24. Lf1 Kh1 25. Dd3
play all play one stop play next play all
Cook: 1. Sg1-f3 Sg8-f6 2. Sf3-g5 Sf6-d5 3. Sg5xh7 Sd5-c3 4. Sh7xf8 Th8-h5 5. Sf8-e6 Th5-g5 6. Se6-c5 Ke8-f8 7. b2-b4 Kf8-g8 8. e2-e4 Kg8-h7 9. Dd1-g4 Kh7-g6 10. h2-h4 Kg6-f6 11. h4xg5+ Kf6-e5 12. Dg4-g3+ Ke5-d4 13. Th1-h6 Sc3xb1 14. Ke1-e2 Kd4-c4 15. Ke2-e3+ Kc4xb4 16. Lc1-a3+ Kb4xa3 17. Ke3-f4+ Ka3-b2 18. Th6-b6+ Kb2-c1 19. Lf1-a6 Kc1-d1 20. a2-a4 Kd1-e1 21. Sc5-d3+ Ke1-e2 22. g5-g6 Ke2-f1 23. Sd3-b2+ Kf1-g1 24. La6-f1 Kg1-h1 25. Dg3-d3 (Stelvio v0.93, RA)
more ...
comment
Keywords: Unique Proof Game, Promenade (k)
Genre: Retro
FEN: rnbq4/ppppppp1/1R4P1/8/P3PK2/3Q4/1NPP1PP1/Rn3B1k
Reprints: 579 Ukrainisches Album 1986-1990
113 Shortest Proof Games 11/1991
Input: Gerd Wilts, 1995-06-03
Last update: Gerd Wilts, 2022-12-17 more...
6 - P0000404
Michel Caillaud
Die Schwalbe 80 04/1983
P0000404
(11+15) C+
BP in 45,0
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 Sh7 40. Kf3 Ke1 41. Kg2 Kd1 42. Kf1 Kc1 43. Ke1 Kb2 44. Kd1 Ka1 45. Kc1 Lg1
play all play one stop play next play all
Reto: This is now the new record for the longest computer tested SPG. Strategy seeking takes up all the time, playing the 800 strategies on the other hand is done within a few seconds. (2023-08-11)
Reto: With the upcoming v1.6, this is solved by Stelvio in around 20min. The improvement is due to the fact that the cage in the south-west is now detected (either the wRa1 is captured inside the cage or the wBc1 is captured at home) (2023-09-02)
comment
Keywords: Unique Proof Game, Move Length Record, Non-standard material (ss), Promotion (ssT)
Genre: Retro
Computer test: Stelvio 1.5 in about 2.5 days.
FEN: nn4nR/2pppp1n/1p3p2/8/rr1R1P2/PP6/b1PPPP2/kBK3b1
Input: Gerd Wilts, 1995-06-03
Last update: A.Buchanan, 2023-08-12 more...
7 - P0000541
Tivadar Kardos
3398 Die Schwalbe 67 02/1981
P0000541
(13+12) cooked
BP in 6,0
1. Sf3 e5 2. Sxe5 Se7 3. Sxd7 Sec6 4. Sxb8 Dxd2 5. Dxd2 Sxb8 6. Dd8+ Kxd8
play all play one stop play next play all
Cook: 1. Sh3 d5 2. Sf4 Sf6 3. Sxd5 Se4 4. Sxe7 Sxd2 5. Dxd2 Kxe7 6. Dxd8 Kxd8
(Can transpose B1&B2)
HHS ('Schwalbe' Heft 71, Oktober 1981, S. 349): "ein schwarzer Schuft - lässt seinen Zwillingsbruder von einem weissen Söldner killen, um dessen Platz einzunehmen: ein regelrechter Krimi."
Als Vergleichsaufgaben sind in der 'Schwalbe' angegeben: G. Schweig (P0002287), Mortimer (P1394750), W. Naef & H. Klüver (P0002832)
A.Buchanan: It's curious that if we shift sK to e8 (i.e. make the position fully homebase) then it is sound as BP in 6.0! The magic of homebase! :) I don't know if it was a typo - maybe someone can check the magazine archive? (2021-10-19)
A.Buchanan: WinChloe & YACPDB don't know this composition. (2021-10-20)
Mario Richter: No typo, the position with black Kd8 was intended, the cook was found by the 'Schwalbe'-solvers (Heft 71, Oktober 1981, p. 349) (2021-10-21)
more ...
comment
Keywords: Unique Proof Game, Homebase (W), Impostor (s), Superseded by (P1394733)
Genre: Retro
FEN: rnbk1b1r/ppp2ppp/8/8/8/8/PPP1PPPP/RNB1KB1R
Input: Gerd Wilts, 1995-06-03
Last update: Mario Richter, 2021-10-21 more...
8 - P0000577
Tivadar Kardos
3742 Die Schwalbe 72 12/1981
P0000577
(8+12)
BP in 11,5
1. d4 e5 2. Lg5 Dxg5 3. Sf3 Dxg2 4. Sxe5 Dxh1 5. Sxd7 Dd5 6. Sxf8 Dxa2 7. Sg6 Dxa1 8. Sxh8 Da6 9. Sg6 Dxg6 10. Dd3 Dxd3 11. e3 Dxf1+ 12. Kd2
play all play one stop play next play all
paul: C+ pour les premiers dix coups (Popeye). (2011-09-17)
Sally: Die Reihenfolge der Züge ist festgelegt, aber eine bestimmte Thematik wird nicht gezeigt. Dieser Sachverhalt scheint sehr zur Schwierigkeut der Aufgabe beigetragen zu haben. Es gab nur 2 Löser! (2017-09-06)
A.Buchanan: Up to 10.5, the solution is unique (Jacobi, 2.5 hours on my little laptop). Maybe someone here can push it all the way? (2021-11-26)
Henrik Juel: Natch 3.1 could not even find pos. 1 in several hours (2021-11-26)
comment
Keywords: Unique Proof Game
Genre: Retro
FEN: rnb1k1n1/ppp2ppp/8/8/3P4/4P3/1PPK1P1P/1N3q2
Input: Gerd Wilts, 1995-06-03
Last update: Gerd Wilts, 2005-12-27 more...
9 - P0000736
Tivadar Kardos
2935 Die Schwalbe 59 10/1979
P0000736
(10+14) C+
BP in 7,0
1. Sc3 Sf6 2. Se4 Sxe4 3. g3 Sxg3 4. Sf3 Sxh1 5. Se5 Sxf2 6. Sxd7 Sxd1 7. Sxb8 Txb8
play all play one stop play next play all
Sally: Eine eindeutige Zugfolge, was bei solchen Aufgaben nicht oft zutrifft. Nicht ganz leicht. Der Rekord steht bei 41,5 Zügen.
(BS). (2017-09-06)
Henrik Juel: 41.5 moves is a very old record
The current record length for proof games is 58.5 moves in a problem by Pronkin, Frolkin & Keym, problem C, p.7 in Die Schwalbe, heft 283, February 2017
The former record was 57.5 moves in a problem by Pronkin & Frolkin, Die Schwalbe, 1989 (V) (2017-09-06)
Olaf Jenkner: The current record length for proof games is 57.5 moves (P0000136) because P1338946 has been cooked. (2021-11-25)
comment
Keywords: Unique Proof Game, Superseded by (P1396199)
Genre: Retro
Computer test: (Natch 2.2Beta1 Copyright (C) 1997,98,99,2001,2002,2003 Pascal Wassong)
FEN: 1rbqkb1r/ppp1pppp/8/8/8/8/PPPPP2P/R1BnKB2
Input: Gerd Wilts, 1995-06-03
Last update: A.Buchanan, 2021-11-25 more...
10 - P0001121
Michel Caillaud
4298v Die Schwalbe 80 04/1983
2. ehrende Erwähnung
P0001121
(12+14) C+
BP in 30,5
1. a4 c6 2. a5 Dc7 3. a6 De5 4. axb7 a5 5. b4 a4 6. b5 Ta5 7. b6 Sa6 8. b8=D a3 9. Dd6 a2 10. De6 dxe6 11. b7 Kd7 12. b8=T Kd6 13. Tb3 Kd5 14. Tf3 Ke4 15. Tf5 exf5 16. Sa3 Le6 17. Sb5 Lc4 18. La3 e6 19. Tc1 a1=S 20. d4 Sb3 21. d5 Sd2 22. d6 Sxf1 23. d7 Sg3 24. hxg3 Lb4+ 25. Kf1 Se7 26. Th6 Tb8 27. d8=L Sc8 28. Lh4 g5 29. g4 gxh4 30. g5 Le1 31. f3+
play all play one stop play next play all
more ...
comment
Keywords: Ceriani-Frolkin Theme (DTsL), Unique Proof Game, Allumwandlung, Promotion
Genre: Retro
Computer test: Moldenhauer: Computerprüfung: C+ Stelvio 1.11 63 Sekunden. Keine Lösung: BP 29.5, BP 30.0.
FEN: 1rn5/5p1p/n1p1p2R/rN2qpP1/2b1k2p/B4P2/2P1P1P1/2RQbKN1
Reprints: 12 Shortest Proof Games 11/1991
(A) Quartz 26 10-12/2004
Input: Gerd Wilts, 1995-06-03
Last update: A.Buchanan, 2023-04-15 more...
11 - P0001270
Matti Arvo Myllyniemi
142 Europe Echecs 84 01/1966
P0001270
(15+15) C+
BP in 9.5
1. e3 d5 2. Lc4 d4 3. Se2 d3 4. 0-0 dxc2 5. d4 Kd7 6. d5 Kd6 7. Dd4 Sd7 8. Ld2 c1=L 9. Lb4+ c5 10. dxc6ep+
play all play one stop play next play all
more ...
comment
Keywords: Unique Proof Game, En passant, Non-standard material (l), Castling (wk), Promotion (l), Valladao Task (sww)
Genre: Retro
Computer test: Ergänzung Stelvio 1.2 C+: Keine Lösung: BP 8.5, 9.0. 10. dxc6ep++ Doppelschach.
FEN: r1bq1bnr/pp1npppp/2Pk4/8/1BBQ4/4P3/PP2NPPP/RNb2RK1
Reprints: 92 Shortest Proof Games 11/1991
Input: Gerd Wilts, 1995-06-03
Last update: A.Buchanan, 2023-05-25 more...
12 - P0001427
Karl Fabel
Am Rande des Schachbretts 1947
P0001427
(13+14) C+
BP in 41,5
1. Sf3 a5 2. Sd4 a4 3. Sb3 axb3 4. a3 Ta4 5. Ta2 bxa2 6. Tg1 axb1=S 7. Th1 Sc3 8. Tg1 Sb5 9. Th1 Sa7 10. Tg1 b5 11. Th1 Lb7 12. Tg1 Ld5 13. Th1 La2 14. b3 h5 15. Lb2 h4 16. Lf6 h3 17. Lh4 Sf6 18. Da1 Sh5 19. Df6 Tf4 20. Da6 e6 21. Kd1 Dg5 22. Kc1 Dg3 23. hxg3 Lc5 24. gxf4 Le3 25. Lg3 Ke7 26. Lh2 Kf6 27. g3 Kf5 28. Lg2 Kg4 29. La8 Sbc6 30. Kb2 Tb8 31. Ta1 Lb1 32. Lg1 h2 33. Kc3 Kh3 34. Kd3 Kg2 35. Ke4 Kf1 36. Kf3 Ke1 37. Kg4 Kd1 38. Kg5 f6+ 39. Kg6 Kc1 40. Kf7 Sd8+ 41. Ke8 Kb2 42. Ta2+
play all play one stop play next play all
Sally: Eine eindeutige BwP., die lange Zeit den Längenreord hielt und, wenn auch mit langer Verzögerung, wesentlich zum Boom dieser Gattung in den letzten 15 Jahren beigetragen hat. Im-
mer noch eine faszinierende Aufgabe. Nr. KF-13 Schwalbe Okt. 2005. (2011-12-05)
Moldenhauer: Ergänzung: Keine Lösung: BP 40.5, BP 41.0. (2023-05-20)
comment
Keywords: Unique Proof Game, Move Length Record, Non-standard material, Promotion
Genre: Retro
Computer test: Stelvio 1.17, in 3h.
FEN: Br1nK3/n1pp2p1/Q3pp2/1p5n/5P2/PP2b1P1/RkPPPP1p/1b4B1
Reprints: 1366 FIDE Album 1945-1955 1964
301 Europe Echecs 200 07/1975
(VIII) feenschach 28 05-07/1975
feenschach 38 04-06/1977
78 Shortest Proof Games 11/1991
17a 64 Proof Games 2012
Input: Gerd Wilts, 1995-06-03
Last update: Reto, 2023-04-14 more...
13 - 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+
play all play one stop play next play all
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)
comment
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...
14 - P0001569
Andrey Frolkin
439v Europe Echecs 310 10/1984
Lob
P0001569
(12+14) cooked
BP in 27,0
1. f4 h5 2. f5 h4 3. f6 h3 4. fxe7 f5 5. d4 Kf7 6. e8=T Kg6 7. Te6+ Kh5 8. Ta6 bxa6 9. Dd2 Lb7 10. e4 Lc6 11. e5 La4 12. e6 Sc6 13. e7 Db8 14. e8=T Db3 15. Te5 Te8 16. d5 Te6 17. dxe6 Lb4 18. Ta5 Lc3 19. Lb5 f4 20. e7 f3 21. e8=T f2+ 22. Ke2 f1=S 23. Tb8 Sxh2 24. Tb6 cxb6 25. Sf3 bxa5 26. Se5 Sf3 27. Sg4 Sfd4+
play all play one stop play next play all
Cook: 1. f4 h5 2. f5 h4 3. f6 h3 4. fxe7 f5 5. e4 Kf7 6. e8=T f4 7. Te6 f3 8. Ta6 bxa6 9. e5 Kg6 10. e6 Lb7 11. e7 Lc6 12. e8=T La4 13. Te5 Sc6 14. Ta5 Db8 15. d4 Db3 16. Lb5 f2 17. Ke2 f1=S 18. Sf3 Te8 19. Se5 Kh5 20. d5 Te6 21. dxe6 Sxh2 22. e7 Sf3 23. e8=T Lb4 24. Tb8 Lc3 25. Tb6 cxb6 26. Sg4 bxa5 27. Dd2 Sd4
more ...
comment
Keywords: Ceriani-Frolkin Theme (TTT), Unique Proof Game, Non-standard material, Promotion (s)
Genre: Retro
Computer test: Computerprüfung: Cooked Stelvio 1.11 1 Sekunde. Keine Lösung: BP 26.0, BP 26.5.
FEN: 6nr/p2p2p1/p1n5/pB5k/b2n2N1/1qb4p/PPPQK1P1/RNB4R
Reprints: 21 Shortest Proof Games 11/1991
Input: Gerd Wilts, 1995-06-03
Last update: A.Buchanan, 2023-05-08 more...
15 - P0001572
Andrey Frolkin
442 Europe Echecs 313 01/1985
P0001572
(15+13) C+
BP in 16,5
1. Sc3 Sf6 2. Sd5 Se4 3. Sxe7 Sg5 4. Sg6 Lb4 5. e3 d6 6. Se2 Kd7 7. Sc3 Kc6 8. Sb1 Sd7 9. Lb5+ Kxb5 10. Sxh8 c6 11. Sxf7 Da5 12. Se5 Sb6 13. Sf3 Ld7 14. Sg1 Te8 15. f3 Te4 16. Kf2 Le8 17. Kg3
play all play one stop play next play all
more ...
comment
Keywords: Unique Proof Game, Interchange (SS)
Genre: Retro
Computer test: Natch 2.3 Copyright (C) 1997,98,99,2001,2002,2003,2004 Pascal Wassong Ergänzung: Stelvio 1.2. Keine Lösung BP 15.5, BP 16.0.
FEN: 4b3/pp4pp/1npp4/qk4n1/1b2r3/4PPK1/PPPP2PP/RNBQ2NR
Reprints: 67 Shortest Proof Games 11/1991
(2) Quartz 21 07-09/2002
Input: Gerd Wilts, 1995-06-03
Last update: A.Buchanan, 2023-05-21 more...
16 - P0001573
Dmitri W. Pronkin
443 Europe Echecs 313 01/1985
P0001573
(16+14) C+
BP in 24,0
1. h4 g5 2. h5 Lg7 3. Th4 Lc3 4. bxc3 Sf6 5. La3 Sd5 6. Ld6 Sf4 7. Sa3 Sh3 8. gxh3 g4 9. Lg2 g3 10. Ld5 g2 11. Sf3 g1=L 12. Kf1 Lh2 13. Kg2 Le5 14. Dg1 Lg7 15. Kg3 b5 16. Kf4 b4 17. Dg6 b3 18. Kg5 b2 19. Lb3 b1=S 20. c4 Sc3 21. Tb1 Sd5 22. Tb2 Sf6 23. Sb1 Sg8 24. Df6 Lf8
play all play one stop play next play all
more ...
comment
Keywords: Unique Proof Game, Homebase (S), Pronkin Theme (ls)
Genre: Retro
Computer test: Natch 2.4 Ergänzung Stelvio 1.2. Keine Lösung BP 23.0, BP 23.5.
FEN: rnbqkbnr/p1pppp1p/3B1Q2/6KP/2P4R/1B3N1P/PRPPPP2/1N6
Reprints: 46 Shortest Proof Games 11/1991
(19a) Die Schwalbe 232 08/2008
Input: Gerd Wilts, 1995-06-03
Last update: A.Buchanan, 2023-05-21 more...
17 - 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
play all play one stop play next play all
Erstdarstellung einer Frolkin-Ceriani-Allumwandlung in einer eindeutigen KBP.
more ...
comment
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...
18 - P0001580
Dmitri W. Pronkin
450 Europe Echecs 319/320 07-08/1985
P0001580
(12+11) cooked
BP in 31,5
1. b4 h5 2. Lb2 h4 3. Dc1 h3 4. Kd1 hxg2 5. h4 e5 6. h5 e4 7. h6 e3 8. h7 exf2 9. e4 f5 10. Se2 g1=L 11. Lg2 f1=L 12. e5 Lb6 13. d4 Lfc5 14. dxc5 f4 15. cxb6 f3 16. Df4 f2 17. Sc1 La6 18. Sd2 f1=L 19. Tb1 Lfb5 20. c4 Se7 21. cxb5 Tg8 22. hxg8=L g5 23. Lc4 d5 24. bxa6 Lf5 25. e6 Sc8 26. e7 Kf7 27. e8=L+ Kg8 28. Leb5 c6 29. Tf1 cxb5 30. Tf2 Sc6 31. Sf1 dxc4+ 32. Ld5+
play all play one stop play next play all
Cook: 1. b4 e5 2. Lb2 e4 3. Dc1 e3 4. Kd1 exf2 5. g4 Ld6 6. g5 Lxh2 7. g6 Kf8 8. gxf7 g5 9. Lg2 f1=L 10. e4 Lb5 11. Se2 Lg1 12. Th4 h5 13. e5 Kg7 14. c4 Th6 15. cxb5 Ta6 16. Tc4 Lc5 17. d4 h4 18. e6 h3 19. e7 h2 20. e8=D d5 21. bxa6 Se7 22. Db5 c6 23. Sd2 cxb5 24. Sf1 h1=D 25. f8=T Dh6 26. Tf2 Db6 27. Df4 Lf5 28. Tb1 Kg8 29. dxc5 Sc8 30. cxb6 Sc6 31. Sc1 dxc4+ 32. Ld5+
Paulo Roque: obs: Cook: 26...D6b6 (2008-12-24)
paul: See P0001634 as correction. (2010-09-25)
Moldenhauer: Computerprüfung: Cooked Stelvio 1.6 in 31:54:04 Stunden. (hh:mm:ss).
1 Lösung mit 20 cooks. (2024-01-07)
comment
Keywords: Ceriani-Frolkin Theme (lllLL), Unique Proof Game, Promotion (lllLL)
Genre: Retro
FEN: r1nq2k1/pp6/PPn5/1p1B1bp1/1Pp2Q2/8/PB3R2/1RNK1N2
Reprints: 26 Shortest Proof Games 11/1991
Input: Gerd Wilts, 1995-06-03
Last update: A.Buchanan, 2021-04-06 more...
19 - P0001600
Pascal Wassong
470 Europe Echecs 334 10/1986
P0001600
(13+14) cooked
BP in 20,0
1. b4 c5 2. b5 Sc6 3. bxc6 b5 4. c7 La6 5. c8=L d6 6. Lf5 Tc8 7. d4 Tc6 8. d5 Db8 9. dxc6 e6 10. c7 Le7 11. c8=S Ld8 12. Se7 Lb6 13. Sg6 hxg6 14. h4 Ke7 15. h5 Kf6 16. h6 Se7 17. h7 Te8 18. h8=T gxf5 19. Th4 Sg6 20. Te4 fxe4
play all play one stop play next play all
Cook: 1. b4 c5 2. b5 Sc6 3. bxc6 b5 4. d4 La6 5. d5 Tc8 6. d6 Tc7 7. dxc7 Db8 8. c8=L d6 9. Lf5 e6 10. h4 Ke7 11. h5 Kf6 12. c7 Le7 13. c8=S Ld8 14. Se7 Lb6 15. Sg6 Se7 16. h6 hxg6 17. h7 Te8 18. h8=T gxf5 19. Th4 Sg6 20. Te4 fxe4
Henrik Juel: Dual: ... 4.d4 La6 5.d5 Tc8 6.d6 Tc7 7.dxc7 Db8 8.c8L d6 9.Lf5 ... (2004-02-12)
more ...
comment
Keywords: Ceriani-Frolkin Theme (TLS), Unique Proof Game, Homebase (W), Promotion
Genre: Retro
Computer test: Ergänzung Stelvio 1.2. Keine Lösung BP 19.0, BP 19.5.
FEN: 1q2r3/p4pp1/bb1ppkn1/1pp5/4p3/8/P1P1PPP1/RNBQKBNR
Input: Gerd Wilts, 1995-06-03
Last update: A.Buchanan, 2023-05-21 more...
20 - P0001605
Dmitri W. Pronkin
Andrey Frolkin

475 Europe Echecs 337 01/1987
P0001605
(1+16) C+
BP in 17.0
1. d3 h6 2. Lg5 hxg5 3. h4 Txh4 4. a4 Txa4 5. Th6 Sxh6 6. g4 Sxg4 7. Lg2 Sxf2 8. Lc6 Sxc6 9. d4 Sxd4 10. c4 Sxe2 11. c5 Sxg1 12. c6 dxc6 13. Dd4 Dxd4 14. Ta3 Dxb2 15. Th3 Lxh3 16. Sc3 0-0-0 17. Sd5 Txd5= patt
play all play one stop play next play all
Henrik Juel: Black makes 15 captures.
The first 13.0 moves are correct by Euclide 1.0, but it takes some 4 minutes, so a complete test would probably take more than a day (2014-12-09)
paul: Jacobi checked the last 16 moves (in about 20 min). (2018-05-10)
Mario Richter: I would like to label this problem as a "Massacre PG", but the current definition of that term only knows of two-sided MPGs. Perhaps we could make the same differentiation as for "Homebase"?!
Btw., wasn't "popeye" best for such massacres?
rawbats confirms complete correctness of the problem after approx. 25 minutes. (2018-05-11)
Henrik Juel: Yes, Mario, Popeye is fairly good at this type
C+ by Popeye 4.61 in 57 minutes (2018-05-11)
A.Buchanan: @Mario: yes I agree it would be good to make massacre more specific. There are 69 massacres currently, almost all 2-sided, but maybe also some series-movers (unique or non-unique) which are currently not counted? (2018-05-12)
more ...
comment
Keywords: Unique Proof Game, Castling, Homebase (w), Rex solus (w), Massacre PG
Genre: Retro
Computer test: C+ rawbats. C+ by Popeye 4.61 in 57 minutes. C+ Stelvio 1.2 2 Sekunden. Keine Lösung: BP 16.0, BP 16.5.
FEN: 2k2b2/ppp1ppp1/2p5/3r2p1/r7/7b/1q3n2/4K1n1
Reprints: 116 Shortest Proof Games 11/1991
20a 64 Proof Games 2012
Input: Gerd Wilts, 1995-06-03
Last update: A.Buchanan, 2023-05-21 more...
21 - P0001629
Andrey Frolkin
498 Europe Echecs 355/356 07-08/1988
2. ehrende Erwähnung
P0001629
(14+14) C+
BP in 26,5
1. Sc3 c5 2. Sd5 c4 3. Sxe7 c3 4. Sg6 hxg6 5. Sf3 Th5 6. Sd4 Ta5 7. Sb5 f5 8. Sa3 Df6 9. Sb1 La3 10. Tg1 d6 11. Th1 Ld7 12. Tg1 La4 13. Th1 Kd7 14. Tg1 Kc6 15. Th1 Kb5 16. Tg1 Sc6 17. Th1 Te8 18. Tg1 Te3 19. Th1 Td3 20. cxd3 c2 21. Tg1 cxd1=S 22. Th1 Sc3 23. Tg1 Se4 24. Th1 Dc3 25. Tg1 Sgf6 26. Th1 Se8 27. Tg1
play all play one stop play next play all
Moldenhauer: Computerprüfung: C+ Stelvio 1.11 1 Sekunde.
Keine Lösung: BP 25.5, BP 26.0. (2023-04-02)
comment
Keywords: Unique Proof Game, Non-standard material, Pendulum (T x15), Promotion, Impostor (S)
Genre: Retro
Computer test: Stelvio 1.11
FEN: 4n3/pp4p1/2np2p1/rk3p2/b3n3/b1qP4/PP1PPPPP/RNB1KBR1
Reprints: 502 Europe Echecs 358 10/1988
102 Shortest Proof Games 11/1991
Input: Gerd Wilts, 1995-06-03
Last update: James Malcom, 2023-05-02 more...
22 - P0001634
Dmitri W. Pronkin
503v Europe Echecs 358 04/1989
5. Preis
P0001634
(12+11) C+
BP in 31,0
1. b3 h5 2. La3 h4 3. Dc1 h3 4. Kd1 hxg2 5. h4 e5 6. h5 e4 7. h6 e3 8. h7 exf2 9. e4 f5 10. Se2 g1=L 11. Lg2 f1=L 12. e5 Lb6 13. d4 Lfc5 14. dxc5 f4 15. cxb6 f3 16. Df4 f2 17. Sc1 La6 18. Lc5 f1=L 19. a3 Lfb5 20. c4 Se7 21. cxb5 Tg8 22. hxg8=L g5 23. Lc4 d5 24. bxa6 Lf5 25. e6 Sc8 26. e7 Kf7 27. e8=L+ Kg8 28. Leb5 c6 29. Ta2 cxb5 30. Tc2 Sc6 31. Sa2 dxc4+
play all play one stop play next play all
paul: Correction of P0001580 (2010-09-25)
Silvio Baier: Mit 30....dc+ ist das C+ (Euclide 0.98, Retractor für den letzten Zug) (2011-07-08)
James Malcom: So this is fully C+? (2021-01-27)
Henrik Juel: No, another problem in 30.0 moves ending with 30. Tc2 dxc4+ is tested OK (2021-01-27)
more ...
comment
Keywords: Ceriani-Frolkin Theme (lllLL), Unique Proof Game, Promotion (lllLL)
Genre: Retro
Computer test: Computerprüfung: C+ Stelvio 1.11 65:30:51 Stunden. (hh:mm:ss) Keine Lösung: BP 30.0, BP 30.5.
FEN: r1nq2k1/pp6/PPn5/1pB2bp1/2p2Q2/PP6/N1R3B1/1N1K3R
Reprints: 580 Ukrainisches Album 1986-1990
26 Shortest Proof Games 11/1991
H25 FIDE Album 1986-1988 1995
(H25) Die Schwalbe 156, p. 237, 12/1995
feenschach 141 06/2001
Thema Danicum 105 2002
(C) Quartz 22 10-12/2002
H2 The Problemist 07/2010
(18) Die Schwalbe 250A 08/2011
Input: Gerd Wilts, 1995-06-03
Last update: A.Buchanan, 2023-05-08 more...
23 - 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
play all play one stop play next play all
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)
comment
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...
24 - P0001638
Michel Caillaud
507 Europe Echecs 364 04/1989
2. ehrende Erwähnung
P0001638
(13+13) C+
BP in 24,5
1. f3 c6 2. Kf2 Db6+ 3. Kg3 Dxg1 4. h4 Dxf1 5. h5 Dxh1 6. h6 Dh5 7. hxg7 Sh6 8. g8=S Lg7 9. a4 Lc3 10. a5 f6 11. a6 Kf7 12. axb7 Kg6 13. Txa7 Sf7 14. Ta1 Ta4 15. Sh6 Sa6 16. b8=T Tf8 17. Tb4 Sh8 18. Th4 Tf7 19. Th1 Th4 20. Sg4 Sb4 21. Sf2 La6 22. Sh3 Ld3 23. Sg1 Kg5 24. Kf2 Lg6 25. Ke1
play all play one stop play next play all
Schlag von wSg1 und wTh1 auf ihren Ursprungsfeldern. Anschließend werden die beiden Orginalsteine durch UW-Steine ersetzt.
paul: The last moves are: 14.Ta1 Ta4 15.Sh6 Sa6 16.b8=T Tf8 17.Tb4 Sh8 18.Th4 Tf7 19.Th1 Th4 20. Sg4 Sb4 21. Sf2 La6 22. Sh3 Ld3 23. Sg1 Kg5 24. Kf2 Lg6 25. Ke1
Phoenix-Pronkin theme: wNg1 & wRh1 are promoted, here combined with wK-switchback. (2008-03-24)
more ...
comment
Keywords: Unique Proof Game, Pronkin Theme (TS), Switchback (KT)
Genre: Retro
Computer test: Euclide 0.96 Ergänzung: Stelvio 1.2. Keine Lösung: BP 23.5, BP 24.0.
FEN: 7n/3ppr1p/2p2pb1/6kq/1n5r/2b2P2/1PPPP1P1/RNBQK1NR
Reprints: 43 Shortest Proof Games 11/1991
H16 FIDE Album 1989-1991 1997
feenschach 141 06/2001
Input: Gerd Wilts, 1995-06-03
Last update: A.Buchanan, 2023-05-21 more...
25 - P0001641
Francois Brassaud
510 Europe Echecs 367/368 07/1989
A. Hazebrouck gewidmet
P0001641
(13+14) cooked
KBP?
1. h4 e5 2. h5 Ke7 3. h6 Kd6 4. hxg7 Kc5 5. Th6 Kb4 6. Tc6 h5 7. e4 h4 8. Ke2 h3 9. Kf3 Th4 10. Le2 Sh6 11. g8=L f6 12. Lb3 h2 13. c4 h1=S 14. Dc2 Sg3 15. fxg3 a5 16. g4 a4 17. g5 axb3 18. g6 bxc2 19. g7 cxb1=T 20. g8=D
play all play one stop play next play all
Cook: 1. c2-c4 a7-a6 2. e2-e4 e7-e6 3. f2-f4 h7-h5 4. Dd1xh5 Ke8-e7 5. Dh5-b5 Th8-h4 6. Ke1-e2 Th4-g4 7. h2-h4 a6xb5 8. h4-h5 b5-b4 9. h5-h6 Ke7-d6 10. h6-h7 Kd6-c5 11. Th1-h6 Tg4-h4 12. h7-h8=D g7-g6 13. Dh8-c3 b4xc3 14. Ke2-f3 c3-c2 15. f4-f5 c2xb1=T 16. f5xg6 Kc5-b4 17. g6-g7 e6-e5 18. Th6-c6 f7-f6 19. Lf1-e2 Sg8-h6 20. g7-g8=D (H. Juel)
more ...
comment
Keywords: Allumwandlung, Ceriani-Frolkin Theme (Ls), Unique Proof Game, Non-standard material
Genre: Retro
Computer test: Euclide 1.01 Moldenhauer: Computerprüfung: Cooked Stelvio 1.11 2 Sekunden. Keine Lösung: BP 18.5, BP 19.0. KBP = 19.5.
FEN: rnbq1bQ1/1ppp4/2R2p1n/4p3/1kP1P2r/5K2/PP1PB1P1/RrB3N1
Reprints: 135 Shortest Proof Games 11/1991
Input: Gerd Wilts, 1995-06-03
Last update: A.Buchanan, 2023-04-15 more...
26 - P0001750
Michel Caillaud
Markus Johannes Ott

3710 feenschach 63 12/1982
K. Widlert gewidmet
2. Preis
P0001750
(10+15) C+
BP in 24.5
1. Sf3 a5 2. Sd4 a4 3. Sb3 axb3 4. Sc3 bxc2 5. Se4 cxd1=S 6. Sg5 Se3 7. Sxh7 Sxf1 8. Sg5 Th5 9. Sh7 Tha5 10. Kd1 e5 11. Kc2 Lb4 12. Kd3 d6 13. Ke4 Sd7 14. Kf5 Sdf6+ 15. Kg5 Kd7 16. Tb1 Se8+ 17. Kg4 Kc6+ 18. Kf3 Kb5 19. Ke4 Ka4 20. Kd3 b5 21. Kc2 Lf5+ 22. Kd1 Lxb1 23. Ke1 f5 24. Sf6 gxf6 25. b3#
play all play one stop play next play all
13-zügiges Tempoverlustmanöver des wK.
Moldenhauer: Computerprüfung: C+ Stelvio 1.2 18 Sekunden.
Keine Lösung: BP 23.5, BP 24.0. (2023-05-12)
more ...
comment
Keywords: Unique Proof Game, Promenade (K), Non-standard material, Tempo Loss (K13), Promotion
Genre: Retro
Computer test: Euclide 0.93
FEN: r2qn1n1/2p5/3p1p2/rp2pp2/kb6/1P6/P2PPPPP/1bB1Kn1R
Reprints: 985 FIDE Album 1980-1982 1988
58 Shortest Proof Games 11/1991
3384 U.S. Problem Bulletin 102/103 07-10/1995
Input: Gerd Wilts, 1995-06-03
Last update: James Malcom, 2021-02-15 more...
27 - 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
play all play one stop play next play all
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)
comment
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...
28 - P0001765
Kostas Prentos
26 Phénix 1 05/1988
P0001765
(11+15) cooked
BP in 18,5
1. Sf3 f5 2. Sd4 Kf7 3. Sb5 Kg6 4. Sd6 exd6 5. e4 Le7 6. e5 Lh4 7. e6 Df6 8. e7 Dxb2 9. e8=S Se7 10. Lc4 Tf8 11. 0-0 Tf6 12. f3 Kh5 13. Te1 Th6 14. Lf7+ Sg6 15. Te7 Dxc1 16. De1 Dxd2 17. De6 dxe6 18. Td7 Dg5 19. Sxg7#
play all play one stop play next play all
Cook: 1. d4 g5 2. Sf3 Lg7 3. e4 Lxd4 4. e5 Lxb2 5. Dd6 exd6 6. e6 f5 7. e7 Kf7 8. e8=S Se7 9. Sxg5+ Kg6 10. Lc4 Kh5 11. 0-0 Tg8 12. Te1 Tg6 13. f3 Th6 14. Lf7+ Sg6 15. Te7 Lf6 16. Se6 dxe6 17. Td7 Lh4 18. Lg5 Dxg5 19. Sg7#
Kostas Prentos: A correction was published in Phenix, 2009 (No.186/Pg.7979)
Solution:
1. Sf3 f5 2. Sd4 Kf7 3. Sb5 Kg6 4. Sd6 exd6 5. e4 Le7 6. e5 Lh4 7. e6 Dg5 8. e7 Dg3 9. e8=T Se7 10. Lc4 Tf8 11. 0-0 Tf6 12. f3 Kh5 13. Te1 Th6 14. Lf7+ Sg6 15. T1e6 dxe6 16. Txc8 Sd7 17. Th8 Txh8 18. Le8 (2022-12-08)
Moldenhauer: Computerprüfung: Cooked Stelvio 1.2 00:33:56 Minuten. (hh:mm:ss)
Keine Lösung: BP 17.5, BP 18.0.
Beispiel: 1.Sf3 f5 2.d4 Kf7 3.e4 g5 4.Lc4+ Kg6 5.e5 Lg7 6.e6 Lxd4
7.0–0 Lxb2 8.Dd6 exd6 9.e7 Kh5 10.e8S Se7 11.Te1 Tf8 12.Sxg5 Tf6
13.f3 Th6 14.Lf7+ Sg6 15.Te7 Lf6 16.Se6 dxe6 17.Td7 Lh4 18.Lg5 Dxg5
19.Sg7# (2023-05-30)
comment
Keywords: Unique Proof Game, Castling, Promotion
Genre: Retro
FEN: rnb5/pppR1BNp/3pp1nr/5pqk/7b/5P2/P1P3PP/RN4K1
Input: Gerd Wilts, 1995-06-03
Last update: Gerd Wilts, 2006-10-15 more...
29 - P0001870
Dmitri W. Pronkin
Rex Multiplex 1985
3. ehrende Erwähnung
P0001870
(14+10)
BP in 29,5
1. Sf3 e5 2. Sd4 Dg5 3. Sc6 De3 4. fxe3 h5 5. Kf2 h4 6. De1 h3 7. Kg3 Th4 8. Df2 Ta4 9. Df4 hxg2 10. h4 dxc6 11. h5 Sd7 12. h6 Sb6 13. h7 Ld7 14. h8=T 0-0-0 15. T8h6 Le8 16. Tf6 Tdd4 17. exd4 Lc5 18. dxc5 g1=L 19. cxb6 Lc5 20. bxa7 La3 21. bxa3 g5 22. Lb2 g4 23. Kh4 g3 24. Ld4 g2 25. Sc3 g1=S 26. Tb1 Sh3 27. Tb6 Sf2 28. Ta6 Sd1 29. Lf2 b6 30. a8=D+
play all play one stop play next play all
Moldenhauer: Computerprüfung: C+ Stelvio 2.0 02:29:09 Stunden. (hh:mm:ss) (2023-12-23)
comment
Keywords: Ceriani-Frolkin Theme (Tls), Unique Proof Game, Non-standard material, Castling, Allumwandlung (DTls)
Genre: Retro
FEN: Q1k1b1n1/2p2p2/Rpp2R2/4p3/r4Q1K/P1N5/P1PPPB2/3n1B1R
Reprints: 136 Shortest Proof Games 11/1991
Input: Gerd Wilts, 1995-06-03
Last update: Kevin Begley, 2011-05-18 more...
30 - P0002241
Michel Caillaud
3817 feenschach 65 15/05/1983
1. ehrende Erwähnung
P0002241
(13+14) C+
BP in 34,0
1. f4 a5 2. f5 Ta6 3. f6 Tb6 4. fxg7 f5 5. h4 Sf6 6. g8=T Kf7 7. Tg6 Se8 8. Tc6 dxc6 9. h5 Dd4 10. h6 Dg7 11. hxg7 h5 12. g8=T h4 13. Tg4 h3 14. Ta4 h2 15. e4 Th3 16. La6 Ta3 17. d3 Kg8 18. Lh6 f4 19. Kd2 Lh3 20. g4 Lg2 21. Sh3 Sd7 22. Te1 h1=S 23. g5 Sg3 24. g6 Sf5 25. g7 Kh7 26. g8=T Sfd6 27. Tg5 Sc8 28. Tb5 cxb5 29. b3 bxa4 30. Kc3 Tb5 31. Sd2 Sdb6 32. Tc1 Sa8 33. Kc4 b6 34. c3 Tb4+
play all play one stop play next play all
Renny Bosch: This problem together with P0002238 and P0002243 form a lovely triad in each of which the rightmost three white pawns promote to a common target (Q's, R's, or B's) which subsequently get captured. Studying their similarities and differences, and what it took to make each one work, gives one a good appreciation of the art of SPG composition.

To see them all at once, enter
PROBID='P0002238' OR PROBID='P0002241' OR PROBID='P0002243'
into the search window on the home page.  (2008-03-23)
Moldenhauer: Computerprüfung: C+ Stelvio 1.11 00;56:06 Minuten. (hh:mm:ss)
Keine Lösung: BP 33.0, BP 33.5. (2023-04-19)
Reto: With Stelvio 1.33, solving time drops to 20sec (2023-06-10)
comment
Keywords: Ceriani-Frolkin Theme (TTT), Unique Proof Game, Non-standard material, Promotion (sTTT)
Genre: Retro
Computer test: Stelvio 1.33, 20sec
FEN: n1n1nb2/2p1p2k/Bp5B/p7/prK1Pp2/rPPP3N/P2N2b1/2RQR3
Reprints: 20 Shortest Proof Games 11/1991
Input: Gerd Wilts, 1995-06-03
Last update: Reto, 2023-06-19 more...
31 - P0002257
Ulrich Ring
5674 feenschach 93 11-12/1989
P0002257
(13+15) cooked
BP in 23,5
1. e4 h5 2. Dg4 hxg4 3. d4 Th3 4. d5 Tb3 5. Le3 b5 6. Lb6 axb6 7. h4 Ta4 8. h5 La6 9. h6 Dc8 10. h7 Db7 11. Th6 Da7 12. Tc6 dxc6 13. e5 Kd7 14. e6+ Kd6 15. exf7 Kc5 16. d6 e5 17. d7 e4 18. d8=D e3 19. Dd1 Ld6 20. f8=L g6 21. Lh6 e2 22. Lc1 Tf4 23. h8=T Kb4 24. Th1
play all play one stop play next play all
Cook: 1. e4 h5 2. Dg4 hxg4 3. d4 Th3 4. d5 Tb3 5. Le3 b5 6. Lb6 axb6 7. h4 Ta4 8. h5 La6 9. h6 Dc8 10. h7 Db7 11. Th6 Da7 12. Tc6 dxc6 13. e5 Kd7 14. e6+ Kd6 15. exf7 Kc5 16. d6 e5 17. d7 e4 18. d8=D g6 19. Dd1 Ld6 20. f8=L e3 21. Lh6 e2 22. Lc1 Tf4 23. h8=T Kb4 24. Th1
Alfred Pfeiffer: Die Korrekturfassung 5674v mit gleicher Forderung (fs-99, S.38): 1ss5/d1b5/lbb1b1b1/1bl5/k2t2b1/2t5/BBB2BB1/TSLDKLST soll die Duale der Urfassung (4-fach mögliches Ziehen von g7-g6) nicht mehr enthalten. (2014-11-06)
Henrik Juel: The correction mentioned by Alfred is still cooked, acc. to Euclide 1.01 (2017-11-24)
Joost de Heer: For correction see P1067393. (2023-08-18)
comment
Keywords: Unique Proof Game, Homebase (W), Pronkin Theme (DTL)
Genre: Retro
FEN: 1n4n1/q1p5/bppb2p1/1p6/1k3rp1/1r6/PPP1pPP1/RNBQKBNR
Reprints: 42 Shortest Proof Games 11/1991
Input: Gerd Wilts, 1995-06-03
Last update: Alfred Pfeiffer, 2014-11-06 more...
32 - P0002271
Michel Caillaud
The Problemist 1983
1. Preis
P0002271
(16+14) C+
BP in 22,5
1. h4 a5 2. h5 Ta6 3. Th4 Tb6 4. Sh3 Tb3 5. cxb3 h6 6. Dc2 Th7 7. Dxh7 Sc6 8. d3 Se5 9. Le3 Sg6 10. Sd2 Sh8 11. Tc1 g6 12. Tc5 Lg7 13. Te5 Lf6 14. Lc5 Lg5 15. e3 Lf4 16. Le2 Lg3 17. Lg4 Lh2 18. f3 Lf4 19. Kf2 Lg5 20. Kg3 Lf6 21. Sf2 Lg7 22. Lh3 Lf8 23. Tg4
play all play one stop play next play all
Moldenhauer: Computerprüfung: C+ Stelvio 1.0 1 Sekunde.
Keine Lösung: BP 21.5, BP 22.0. (2023-02-17)
comment
Keywords: Unique Proof Game, Tempo Loss (l11)
Genre: Retro
Computer test: Stelvio 1.0
FEN: 2bqkbnn/1ppppp1Q/6pp/p1B1R2P/6R1/1P1PPPKB/PP1N1NP1/8
Reprints: 62 Shortest Proof Games 11/1991
Input: Gerd Wilts, 1995-06-03
Last update: Silvio Baier, 2023-03-02 more...
33 - P0002274
Thomas R. Dawson
Reading Observer 1913
P0002274
(9+16) C+
PG in 15.0
#2
1. e4 h5 2. Lb5 h4 3. Lc6 bxc6 4. Dh5 Lb7 5. Dd5 cxd5 6. Sf3 dxe4 7. 0-0 exf3 8. Te1 fxg2 9. Te6 dxe6 10. b4 Kd7 11. Lb2 Kc6 12. Lf6 Kb5 13. c4+ Ka4 14. Sc3+ Ka3 15. Te1 gxf6 and then 16. Tb1! ... 17. Tb3#
play all play one stop play next play all
TRD: "The point here is that every move of the game is strictly forced in order and kind, the longest such game existant at present. I expect this task to go much further."
Original stipulation was: "White here mated in two and noticed on examining his score that the mate was administered on his 17th move. What was the game?"
A.Buchanan: This is the earliest unique PG recorded in PDB, but Dawson implies earlier, shorter ones exist. Can any of these be traced? (2021-01-22)
comment
Keywords: Unique Proof Game, Move Length Record, Volet Pawn
Genre: Retro
Computer test: Euclide 0.99
FEN: rn1q1bnr/pbp1pp2/4pp2/8/1PP4p/k1N5/P2P1PpP/4R1K1
Reprints: (7) The Chess Amateur 08/1914
136 Ultimate Themes 1938
76 Shortest Proof Games 11/1991
Input: Gerd Wilts, 1995-06-03
Last update: James Malcom, 2021-01-22 more...
34 - P0002277
Karlheinz Bachmann
v Die Schwalbe 104, p. 217, 04/1987
1. ehrende Erwähnung
P0002277
(11+15) C+
BP in 48,0
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 Sa6 22. Lb2 Sc5 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. h6 Lg3 33. h7 Sh6 34. Th4 Tb8 35. Tb4 Tb7 36. f4+ Kh4 37. h8=T Sf3 38. Tg8 Se5 39. Tg5 Sg6 40. Kf3 Kh3 41. Ke3 Kg2 42. Te5 Kf1 43. Kf3 Ke1 44. Kg2 Kd1 45. Kf1 Kc1 46. Ke1 Kb2 47. Kd1 Ka1 48. Kc1 Sh8
play all play one stop play next play all
paul: Correction of P0000067. (2018-03-03)
Reto: The new length record for a fully tested SPG. (2023-09-18)
Olaf Jenkner: How long does it take with one core and how many cores did you use? (2023-09-18)
Reto: I used 15 seekers and 15 players, but not all of them are active all the time. My guess is that it takes about 7-10h single-threaded. (2023-09-19)
comment
Keywords: Unique Proof Game, Move Length Record, Non-standard material, Promotion (Tss)
Genre: Retro
Computer test: Stelvio 1.66 in 23min (heavily parallelized)
FEN: n6n/1rpppp2/1p3p1n/2n1R3/rR3P2/PP4b1/b1PPPP2/kBK5
Reprints: 82 Shortest Proof Games 11/1991
Input: Gerd Wilts, 1995-06-03
Last update: Reto, 2023-09-18 more...
35 - 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+
play all play one stop play next play all
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)
more ...
comment
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...
36 - 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+
play all play one stop play next play all
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)
comment
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...
37 - P0002312
Kostas Prentos
5673 feenschach 93 11-12/1989
P0002312
(14+11) cooked
BP in 17,5
1. e3 b5 2. Ld3 b4 3. Lg6 b3 4. axb3 hxg6 5. Ta5 Th3 6. Tb5 Tg3 7. hxg3 a5 8. Th8 a4 9. Dh5 a3 10. Se2 Ta4 11. bxa4 gxh5 12. b3 g6 13. Lb2 Lh6 14. Lg7 Lg5 15. Lh6 Lh4 16. gxh4 a2 17. Sg3 a1=T 18. Txg8#
play all play one stop play next play all
Cook: 1. h4 b6 2. Th3 La6 3. Ta3 h5 4. e3 Lxf1 5. Se2 a6 6. Sg3 Le2 7. Txa6 b5 8. Th6 Ta3 9. Txh8 Tc3 10. a4 Lxd1 11. Ta3 Lf3 12. Tb3 Lb7 13. Txb5 Ta3 14. b3 g6 15. Lb2 Lg7 16. Lxg7 Ta1 17. Lh6 Lc8 18. Txg8#
s. Version P0007474
HHS: "Die Auflösung erscheint zunächst nicht übermäßig schwierig - die TTT schlängeln sich durch die BB hindurch, dabei geht geht der Tg8 über a6, um einen der sB dort wiedererstehen zu lassen. Im 'Gegenzug' vollbringt der Lc8 ein Husarenstück - Dd1 und Lf1 gehen auf sein Konto - aber es funktioniert nicht: Der L kommt nicht über b5 hinweg, denn weder der wT noch der sB (der dort entsteht) haben Zeit, ihm Platz zu machen. Also muß man sich was anderes ausdenken: Die sBB kann man zu einem Überkreuzschlagen der wBBa- und b- ausnutzen: Das erleichtert die Rückführung der linken Türme. Aber das genügt noch nicht: Jetzt braucht Schwarz zuviel Züge. Man muß den Gedanken an den L-Streich aufgeben. Dann können die wFiguren ein analoges Spiel der sB oben rechts ermöglichen. Schwarz schafft die Zugzahl spielend, aber Weiß braucht genau 18 Züge, und das auch nur dann, wenn Tg8 direkt nach g3 kann. Aber was sollte dann der erste wRückzug sein? Bis jetzt hat man die sFiguren problemlos einfach in der NO-Ecke wiedererstehen lassen - man muß auch da einen komplizierteren Modus wählen und darf den wBh- nicht einfach zurückgehen lassen, sondern man muß ihm die Möglichkeit geben, ebenso wie sein sGegenüber den wT auf der h-Linie durchzulassen. Das ist kompliziert und knifflig, aber so und nur so klappt es [dies Wort in Gottes Ohr! HG]. Bestechend ist der Einbau der Verführungen, die immer nur um Haaresbreite scheitern." "Gefällt mir!" (WD als Prüfer) Diese ausgekochten und tollen Kreuzschlagmanöver fand aber leider nur HHS, da es doch eine NL gibt.
Henrik Juel: The content is concealed pawn captures
Despite no visible captures White captured a2xPb3xTa4 to open the a-line for [Ta1,Pa7], and h2xTg3xLh4 with black h7xLg6xDh5 to open the h-line for [Th1,Th8]
This makes life difficult for the human solver and for Natch 3.1, who tested the first 15.0 moves correct in 40 sec.
Testing the entire proof game would need more than a couple of hours by Natch (2018-12-08)
paul: See P0007474 as a version. (2020-11-03)
comment
Keywords: Unique Proof Game, Promotion (t)
Genre: Retro
FEN: 1nbqk1R1/2pppp2/6pB/1R5p/P6P/1P2P1N1/2PP1PP1/rN2K3
Reprints: 143 Shortest Proof Games 11/1991
Input: Gerd Wilts, 1995-06-03
Last update: Mario Richter, 2020-11-04 more...
38 - P0002325
Andrey Frolkin
166 Shortest Proof Games 11/1991
P0002325
(16+14) cooked
BP in 15,5
Is this KBP correct?
1. d3 Sh6 2. Kd2 Sf5 3. Kc3 Sd4 4. Kb4 Sb3 5. axb3 Tg8 6. Ta6 Th8 7. Th6 f6 8. e4 Kf7 9. Dh5+ Kg8 10. Le2 De8 11. Dd5+ Df7 12. Lh5 De6 13. Sf3 Df7 14. Te1 De6 15. Te3 Df7 16. Lxf7#
play all play one stop play next play all
Cook: 1. e4 Sh6 2. d3 Sf5 3. Kd2 Sd4 4. Kc3 Sb3 5. axb3 Sc6 6. Ta6 Sb8 7. Th6 f6 8. Kb4 Kf7 9. Dh5+ Kg8 10. Le2 De8 11. Dd5+ Df7 12. Lh5 De6 13. Sf3 Df7 14. Te1 De6 15. Te3 Df7 16. Lxf7
This is an tutorial example of a PG deliberately including a cook.
more ...
comment
Keywords: Unique Proof Game, Pendulum (td x2 x2)
Genre: Retro
Computer test: Computerprüfung: Cooked Stelvio 1.11 13 Sekunden. Keine Lösung: BP 14.0 bis 15.0 und 16.0.
FEN: rnb2bkr/pppppBpp/5p1R/3Q4/1K2P3/1P1PRN2/1PP2PPP/1NB5
Input: Gerd Wilts, 1995-06-03
Last update: A.Buchanan, 2023-05-08 more...
39 - P0002326
Andrey Frolkin
167v Shortest Proof Games 11/1991
P0002326
(14+13) C+
BP in 17,0
1. Sh3 d5 2. Sf4 Kd7 3. Sxd5 Kc6 4. Sxe7+ Kb5 5. Sxc8 Le7 6. Sb6 axb6 7. Tg1 Ta3 8. Th1 Th3 9. f3 Sa6 10. Kf2 Lh4+ 11. Kg1 Sf6 12. De1 Dd4+ 13. Df2 Td8 14. De3 Td5 15. Df2 Sd7 16. De3 f6 17. Df2 Dxf2#
play all play one stop play next play all
The original SPG with 17... Lxf2# was cooked. In order to avoid duals the last move has to be Dxf2#
Moldenhauer: Ergänzung: Danke für durchgeführten Änderungen.
Keine Lösung Stelvio 1.2: BP 16.0, BP 16.5. (2023-05-30)
more ...
comment
Keywords: Unique Proof Game
Genre: Retro
Computer test: C+ Silvio Baier (Euclide 0.95)
FEN: 8/1ppn2pp/np3p2/1k1r4/7b/5P1r/PPPPPqPP/RNB2BKR
Input: Gerd Wilts, 1995-06-03
Last update: A.Buchanan, 2023-05-04 more...
40 - P0002327
Jasper van Atten
The Problemist 1985-1986
3. Preis
P0002327
(16+14) cooked
BP in 20,0
1. a4 Sf6 2. Ta3 Sh5 3. Td3 f6 4. Td6 Kf7 5. d3 Kg6 6. Le3 Kf5 7. Ld4 Kg5 8. e3 Kg6 9. Dg4+ Kf7 10. De6+ Ke8 11. g4 Sc6 12. Lg2 Sa5 13. Lxb7 Tb8 14. Lxc8 Tb3 15. Ke2 Ta3 16. Kf3 Ta1 17. Sa3 Td1 18. Se2 Td2 19. Tb1 a6 20. Sc1 Te2
play all play one stop play next play all
Cook: 1. d3 b5 2. Le3 b4 3. Ld4 b3 4. axb3 Sf6 5. Ta6 Sh5 6. Td6 Sc6 7. e3 Sa5 8. Dg4 Tb8 9. De6 Tb4 10. g4 Ta4 11. Ke2 Ta1 12. Sa3 Td1 13. Lg2 La6 14. Lb7 Lc4 15. Lc8 Lb5 16. Kf3 La4 17. bxa4 Td2 18. Se2 f6 19. Tb1 a6 20. Sc1 Te2

1. d3 Sc6 2. Le3 Tb8 3. Ld4 Sf6 4. e3 Sh5 5. Dg4 b5 6. Ke2 La6 7. De6 b4 8. g4 Lb5 9. Lg2 b3 10. axb3 f6 11. Ta6 La4 12. bxa4 Sa5 13. Td6 Tb3 14. Lb7 Ta3 15. Kf3 Ta1 16. Sa3 Td1 17. Se2 Td2 18. Tb1 a6 19. Sc1 Te2 20. Lc8
more ...
comment
Keywords: Unique Proof Game
Genre: Retro
Computer test: Moldenhauer: Cooked Stelvio 1.11:13 Keine Lösung BP 19.0, BP 19.5 Cooked
FEN: 2Bqkb1r/2ppp1pp/p2RQp2/n6n/P2B2P1/N2PPK2/1PP1rP1P/1RN5
Reprints: 168 Shortest Proof Games 11/1991
Input: Gerd Wilts, 1995-06-03
Last update: A.Buchanan, 2024-03-06 more...
41 - 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
play all play one stop play next play all
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)
more ...
comment
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...
42 - P0002372
Alexander Kislyak
Die Schwalbe 136 08/1992
P0002372
(15+10) cooked
BP in 10,5
1. Sf3 e6 2. Se5 Df6 3. Sxd7 Sxd7 4. a4 Sb6 5. a5 Ld7 6. axb6 0-0-0 7. Txa7 La4 8. Txa4 Td4 9. Txd4 Kb8 10. bxc7+ Ka8 11. Ta4#
play all play one stop play next play all
Cook: 1. Sf3 e6 2. Se5 Df6 3. Sxd7 Kd8 4. Sxb8 Ld7 5. a4 Lb5 6. axb5 Kc8 7. Txa7 Kxb8 8. Ta3 c6 9. bxc6 Ta4 10. c7 Ka8 11. Txa4
Moldenhauer: Computerprüfung: Cooked Stellung Stelvio 1.11 1 Sekunde.
Keine Lösung: BP 9.5, BP 10.0.
Eine Notation von Stelvio:
1.Sf3 e6 2.Se5 Df6 3.Sxd7 Kd8 4.Sxb8 Ld7 5.Sc6+ Kc8 6.Sxa7+ Kb8
7.a4 Lb5 8.axb5 Txa7 9.b6 Ka8 10.bxc7 Ta4 11.Txa4#
Schlüsselwort Rochade? (2023-05-02)
comment
Keywords: Unique Proof Game, Castling
Genre: Retro
FEN: k4bnr/1pP2ppp/4pq2/8/R7/8/1PPPPPPP/1NBQKB1R
Input: Gerd Wilts, 1995-06-03
Last update: Gerd Wilts, 2006-10-15 more...
43 - P0002554
Unto Heinonen
Probleemblad 1991
1. Preis
P0002554
(16+16) cooked
BP in 43.0
1. h4 a5 2. Th3 Ta6 3. Tf3 Tg6 4. Sh3 Tg3 5. Sf4 Th3 6. g3 Th2 7. Lh3 Sh6 8. Le6 Sf5 9. Lc4 d5 10. Kf1 Th1+ 11. Kg2 Tg1+ 12. Kh3 Kd7 13. Kg4 h5+ 14. Kg5 Th6 15. a4 Tb6 16. T1a3 Kc6 17. Tac3 Tb3 18. Sg6 Ta3 19. b3 Ta2 20. La3 Dd6 21. Lc5 Sd7 22. La7 Sb6 23. Sh8 Kc5 24. La6+ Kb4 25. Tc5 g6 26. Sc3 Lg7 27. Se4 Lc3 28. Da1 Sd4 29. Kh6 Ld7 30. Kg7 Lb5 31. Kf8 Ld3 32. Ke8 Dc6+ 33. Kd8 Sc4 34. Kc8 Ka3 35. Kb8 Lb4 36. Ka8 De8+ 37. Lb8 Sb6+ 38. Ka7 Sa8 39. c4 Sc2 40. Df6 Sa1 41. Db6 Kb2 42. Sf6 Ta3 43. Sd7 Ka2
play all play one stop play next play all
Cook: NL
1. h4 a5 2. Th3 Ta6 3. Tf3 Te6 4. g3 Te3 5. Lh3 Sh6 6. Le6 Sf5 7. Lc4 d5 8. Kf1 Dd6 9. Kg2 Da6 10. Kh3 Kd7 11. Kg4 h5+ 12. Kg5 Th6 13. a4 Tb6 14. Ta3 Kc6 15. Tc3 Tb3 16. Sh3 Ta3 17. b3 Ta2 18. La3 Sd4 19. Lc5 Lf5 20. La7 Db6 21. Sf4 Kc5 22. Sg6 Kb4 23. Sh8 g6 24. La6 Lg7 25. Tc5 Db5 26. c4 Sc2 27. Sc3 Ka3 28. Se4 Lc3 29. Da1 Lb4 30. Df6 Tc3 31. Kh6 Kb2 32. Kg7 Ta3 33. Kf8 Sd7+ 34. Ke8 Ka2 35. Kd8 Sa1 36. Kc8 Sf8+ 37. Kb8 Sd7+ 38. Ka8 Tc1 39. Lb8 Sb6+ 40. Ka7 Sa8 41. Db6 Tg1 42. Sf6 De8 43. Sd7 Ld3 (Sebastian Natschke)
Henrik Juel: Very good, Sebastian (although not for the author...) (2019-06-17)
paul: Probably the cook of the year, because the problem is well known. Which is now the length record for a capture free proof game? (2019-07-16)
paul: The length record for a capture-free PG is now 40.5 moves by Th. le Gleuher (Phenix50/1997) (2019-07-16)
Mario Richter: The problem Paul was referring to is P0006623. So far it has resisted all my and rawbats' attempts to cook it, and I think that chances are high that it is indeed correct ... (2019-07-17)
James Malcom: See the correction P1386520 (2021-02-15)
more ...
comment
Keywords: Unique Proof Game, Move Length Record, Capture-free, Superseded by (P1386520)
Genre: Retro
FEN: nB2q2N/KppNpp2/BQ4p1/p1Rp3p/PbP4P/rP1b1RP1/k2PPP2/n5r1
Reprints: H17 FIDE Album 1989-1991 1997
feenschach 137 08-09/2000
Input: Gerd Wilts, 1995-06-03
Last update: A.Buchanan, 2022-11-28 more...
44 - P0002762
Alexander Kislyak
1180 Phénix 17 06/1992
P0002762
(16+16) C+
BP in 23,0
1. c4 c5 2. Db3 Db6 3. Dh3 Dh6 4. b3 b6 5. La3 La6 6. Lb4 Lb5 7. Sa3 Sa6 8. 0-0-0 0-0-0 9. Kb1 Kb8 10. Tc1 Tc8 11. Tc3 Tc6 12. Tg3 Tg6 13. Tg4 Tg5 14. g3 g6 15. Lg2 Lg7 16. Ld5 Ld4 17. Sf3 Sf6 18. Tc1 Tc8 19. Tc3 Tc6 20. Te3 Te6 21. Te4 Te5 22. Tef4 Tef5 23. e4 e5
play all play one stop play next play all
more ...
comment
Keywords: Unique Proof Game, Castling (wgsg), Symmetrical position, Capture-free
Genre: Retro
Computer test: Mondenhauer C+ Stelvio 1.11 00:09:39 Minuten. (hh:mm:ss) Keine Lösung: BP 22.0, BP 22.5.
FEN: 1k6/p2p1p1p/np3npq/1bpBprr1/1BPbPRR1/NP3NPQ/P2P1P1P/1K6
Input: Gerd Wilts, 1995-06-03
Last update: A.Buchanan, 2023-03-27 more...
45 - P0005310
Karlheinz Bachmann
8761 Die Schwalbe 151 02/1995
P0005310
(16+16) cooked
BP in 34,0
1. Sa3 Sa6 2. Sc4 Sc5 3. Se5 Se4 4. c4 c5 5. Da4 Da5 6. b3 b6 7. Lb2 Lb7 8. Tc1 Tc8 9. Tc3 Tc6 10. Th3 Th6 11. e3 e6 12. Le2 Le7 13. Lh5 Lh4 14. Sgf3 Sgf6 15. 0-0 0-0 16. Tc1 Tc8 17. Tc3 Tc6 18. Td3 Td6 19. Td4 Td5 20. d3 d6 21. Dd7 Dd2 22. De7 De2 23. Sd7 Sd2 24. Tg4 Tg5 25. Le5 Le4 26. Lf4 Lf5 27. Sfe5 Sfe4 28. f3 f6 29. Le8 Le1 30. Lg3 Lg6 31. Lf2 Lf7 32. Thg3 Thg6 33. h3 h6 34. Kh2 Kh7
play all play one stop play next play all
Cook: 1. Sa3 Sa6 2. Sc4 Sc5 3. Se5 Se4 4. c4 c5 5. Da4 Da5 6. b3 b6 7. Lb2 Lb7 8. Tc1 Tc8 9. Tc3 Tc6 10. Th3 Th6 11. e3 e6 12. Le2 Le7 13. Lh5 Lh4 14. Sgf3 Sgf6 15. 0-0 0-0 16. Tc1 Tc8 17. Tc3 Tc6 18. Td3 Td6 19. Td4 Td5 20. d3 d6 21. Dd7 Dd2 22. De7 De2 23. Sd7 Sd2 24. Tg4 Tg5 25. Le5 Le4 26. Lf4 Lf5 27. Sfe5 Sfe4 28. f3 Le1 29. Lg3 f6 30. Le8 Lg6 31. Lf2 Lf7 32. Thg3 Thg6 33. h3 h6 34. Kh2 Kh7
more ...
comment
Keywords: Unique Proof Game, Castling, Symmetrical position, Capture-free
Genre: Retro
FEN: 4B3/p2NQbpk/1p1ppprp/2p1N1r1/2P1n1R1/1P1PPPRP/P2nqBPK/4b3
Input: Gerd Wilts, 1995-06-03
Last update: A.Buchanan, 2021-05-13 more...
46 - P0005327
Valerian Onitiu
8397 The Fairy Chess Review 9 28/11/1949
P0005327
(14+16)
BP in 19,0
Die PAS wurde verändert, indem die Position der schwarzen und weißen Steine geändert wurde (Free Chess).
PAS: ssltktdl, LDTKTLSS (nnbrkrqb/pppppppp/8/8/8/8/PPPPPPPP/BQRKRBNN)
1. b3 0-0-0 (Kf8, Te8) 2. Lf6 gxf6 3. Sg3 Lg7 4. Se4 Lh6 5. Sc5 Le3 6. Sa6 Lb6 7. e3 Dg3 8. Lc4 Dd6 9. Le6 fxe6 10. Sf3 Kf7 11. 0-0 (Kg1,Tef1) Tg8 12. Tce1 Tg3 13. Dd1 Th3 14. g4 Tg8 15. Kg2 Tg5 16. Th1 Tb5 17. Sg5 Kg7 18. Df3 La5 19. Te2 Tb6
play all play one stop play next play all
Originalforderung: "In No. 8397 pieces began game on normal ranks, but not in normal array. The two arrays were however similar, e.g., similar pieces were on c1 and f8. Black has just played his 19th move. What was the game?"
Mario Richter: I do not understand, why 1. ... (Kf8, Te8) is noticed as "0-0-0" (does "Free Chess" have a "Free Castling Rule"?) (2020-09-20)
comment
Keywords: Unique Proof Game, Castling
Genre: Retro
FEN: nnb5/ppppp2p/Nr1qppk1/b5N1/6P1/1P2PQ1r/P1PPRPKP/7R
Input: Gerd Wilts, 1995-06-03
Last update: Mario Richter, 2020-09-20 more...
47 - P0005339
Bror Larsson
4339 The Fairy Chess Review 3 28/11/1939
P0005339
(16+16) C+
KBP?
#1
1. a4 a5 2. Ta3 Ta6 3. Tf3 Th6 4. b3 b6 5. La3 La6 6. Lb4 Lb5 7. Sa3 Sa6 8. Da1 Da8 9. Kd1 Kd8 10. Kc1 Kc8 11. Kb2 Kb7 12. Kc3 Kc6 13. Kd4 Th4+ 14. Ke5 h5 15. Kf5 Kd5 16. Kg5 Ke4 17. Tf5 Tf4 18. h4 Th6 19. Th3 Td6 20. Tg3 Sh6 21. Sh3
play all play one stop play next play all
Moldenhauer: Computerprüfung: C+ Stelvio 1.11 1 Sekunde.
Keine Lösung: BP 19.5, BP 20.0.
KBP = 20.5, #1 = Te3#. (2023-05-10)
comment
Keywords: Unique Proof Game, Quasi-symmetrical position, Capture-free
Genre: Retro
Computer test: Natch 2.3 Copyright (C) 1997,98,99,2001,2002,2003,2004 Pascal Wassong
FEN: q4b2/2ppppp1/np2r2n/pb3RKp/PB2kr1P/NP4RN/2PPPPP1/Q4B2
Reprints: La Genesi delle Posizioni 1961
Input: Gerd Wilts, 1995-06-03
Last update: A.Buchanan, 2014-05-22 more...
48 - P0005906
Unto Heinonen
R202v The Problemist 05/1992
2. Preis
P0005906
(12+15) C+
BP in 26.0
1. Sf3 a5 2. Sd4 a4 3. Sb3 axb3 4. Sc3 bxc2 5. Se4 cxd1=L 6. Sg5 Lb3 7. Sxh7 Lc4 8. Sg5 Th5 9. Sh7 Tha5 10. Kd1 d5 11. Kc2 Kd7 12. Kc3 Ke6 13. Kd4 Kf5 14. Ke3 Le6 15. Kf3 Sd7 16. Kg3 Tc8 17. Kh4 g5+ 18. Kh3 Lg7 19. Kg3 Le5+ 20. Kf3 Ld6 21. Ke3 Kg4 22. Kd4 c5+ 23. Kc3 Db6 24. Kc2 Db4 25. Kd1 b5 26. Ke1 Dxd2+
play all play one stop play next play all
paul: Correction of P1001275 (2010-05-08)
A.Buchanan: Does it have to end in a check which is in some sense a defect if unnecessary. Can it be 24. … Db3+ 25. Kd1 b5 26. Ke1 b4 (2023-06-13)
Joost de Heer: 24... Qb3+ 25. Kd1 is illegal. (2023-06-13)
A.Buchanan: Well clearly 24... Qxb2+ then same idea (2023-06-13)
comment
Keywords: Unique Proof Game, Promenade (K), Non-standard material, Tempo Loss (K17)
Genre: Retro
Computer test: Stelvio 1.33, 1min
FEN: 2r3n1/3npp1N/3bb3/rppp2p1/2b3k1/8/PP1qPPPP/R1B1KB1R
Reprints: 3388 U.S. Problem Bulletin 102/103 07-10/1995
Input: Gerd Wilts, 1995-06-26
Last update: Reto, 2023-06-12 more...
49 - P0005911
Unto Heinonen
2375 U.S. Problem Bulletin 01-02/1992
P0005911
(13+16) cooked
BP in 34,5
1. Sc3 h5 2. Se4 h4 3. Sg3 hxg3 4. h4 Th5 5. Th2 gxh2 6. Tb1 hxg1=S 7. Ta1 Sh3 8. Tb1 Sf4 9. Ta1 Sd5 10. Tb1 Sb4 11. Ta1 Td5 12. Tb1 g5 13. Ta1 Lg7 14. Tb1 Ld4 15. Ta1 Lb6 16. Tb1 c5 17. Ta1 Dc7 18. Tb1 De5 19. Ta1 Ld8 20. Tb1 b6 21. Ta1 La6 22. Tb1 Lc4 23. Ta1 a6 24. Tb1 Ta7 25. Ta1 Tc7 26. Tb1 Tc6 27. Ta1 Tf6 28. Tb1 d6 29. Ta1 Kd7 30. Tb1 Ke6 31. Ta1 Kf5 32. Tb1 Kg4 33. Ta1 Tf5 34. Tb1 Sf6 35. Ta1
play all play one stop play next play all
Korrektur siehe P0008426.
James Malcom: What is the cook? (2023-05-02)
more ...
comment
Keywords: Unique Proof Game, Non-standard material, Pendulum (T x30), Superseded by (P0008426)
Genre: Retro
FEN: 1n1b4/4pp2/pp1p1n2/2prqrp1/1nb3kP/8/PPPPPPP1/R1BQKB2
Reprints: (12) feenschach 117 11/1995
Input: Gerd Wilts, 1995-06-26
Last update: James Malcom, 2023-05-02 more...
50 - P0006428
Andrey Frolkin
9133v Die Schwalbe 157, p. 283, 02/1996
P0006428
(13+12) cooked
BP in 20.0
May White castle?
Weiß darf noch rochieren: 1. h4 Sa6 2. h5 Sc5 3. h6 a6 4. hxg7 h5 5. f4 h4 6. f5 h3 7. f6 h2 8. fxe7 Sf6 9. g8=L Lh6 10. Lxf7 Kxf7 11. e8=T Kg6 12. Te6 Dg8 13. Tc6 Db3 14. axb3 dxc6 15. Ta4 Lh3 16. Te4 Tag8 17. Te8 hxg1=D 18. e4 Dd4 19. Lc4 Tg7 20. Lg8 Dd8
Ohne die Bedingung, daß Weiß rochieren darf, gibt es andere BPs: 1. f4 Sa6 2. f5 Sc5 3. f6 a6 4. fxe7 f5 5. e4 f4 6. Lb5 f3 7. Lc6 f2+ 8. Ke2 fxg1=D 9. h4 dxc6 10. h5 Lf5 11. h6 Sf6 12. hxg7 Dd5 13. g8=L Db3 14. Lxh7 Kf7 15. axb3 Lh6 16. Ta4 Tag8 17. Td4 Dxd4 18. e8=T Tg7 19. Lg8+ Kg6 20. Ke1 Dd8
play all play one stop play next play all
SH: Cooked?:
1. e4 f5 2. Ne2 f4 3. h4 f3 4. h5 fxe2 5. f4 exf1B 6. f5 Bc4 7. f6 Bb3 8. axb3 Na6 9. fxe7 Nc5 10. Ra6 Nf6 11. Rc6 dxc6 12. h6 Bh3 13. hxg7 Qd7 14. g8B Bh6 15. Bxh7 Kf7 16. Qf3 Rag8 17. Qe2 Rg7 18. Bg8+ Kg6 19. Qd1 a6 20. e8R Qd8 (2005-06-20)
Henrik Juel: The stipulation question was probably intended as an implicit condition; when answered affirmatively, there should be a unique solution
But SH's solution shows that the problem is cooked (2018-12-09)
more ...
comment
Keywords: Anti-Pronkin, Constrained problem, Unique Proof Game, Castling
Genre: Retro
FEN: 3qR1Br/1pp3r1/p1p2nkb/2n5/4P3/1P5b/1PPP2P1/1NBQK2R
Input: Gerd Wilts, 1996-06-12
Last update: James Malcom, 2022-02-08 more...
51 - P0006447
Gerd Wilts
Norbert Geissler

Retros mailing list 05/1996
P0006447
(15+16) C+
BP in 7.0
1. f4 e5 2. Kf2 Dh4+ 3. Kf3 Df2+ 4. Kg4 h5+ 5. Kh3 h4 6. e4 d5+ 7. g4 hxg3ep#
play all play one stop play next play all
A.Buchanan: Hi the keyword "En passant as mating move" occurred three times, so I've removed two of them. Also the prefix condition means that a search for "En passant" will always catch an "En passant as mating move", so I've removed the vaguer term. (2022-05-07)
A.Buchanan: Does anyone know a trick to find duplicate occurrences of a keyword? My only technique is to stumble across them from time to time (2022-05-07)
Henrik Juel: I cannot help you, of course, Andrew
But it is curious that the error occurred in a problem by the father of the PDB (2022-05-07)
A.Buchanan: Recent changes can be seen by clicking on the "more...", but it doesn't matter (2022-05-07)
comment
Keywords: Unique Proof Game, En passant as mating move, En passant
Genre: Retro
Computer test: Natch 2.1 Copyright (C) 1997,98,99,2001,2002 Pascal Wassong
FEN: rnb1kbnr/ppp2pp1/8/3pp3/4PP2/6pK/PPPP1q1P/RNBQ1BNR
Input: Gerd Wilts, 1996-06-13
Last update: A.Buchanan, 2023-04-08 more...
52 - P0006467
Michel Caillaud
Jacques Rotenberg

3927 Problemkiste 102, p. 168, 12/1995
P0006467
(14+15)
BP in 6.0
N statt S in der PAS
wSU,sSU=Nachtreiter
a) 1. Nxe7 Nxe2 2. Nb1 Nxc1 3. Df3 Nca5 4. Ke2 Ngc6+ 5. Kd3 Nb8 6. Ke4 Ng8+
play all play one stop play next play all
paul: Verified by Jacobi with this input:

stip dia 6
forsyth rnbqkbnr/pppp1ppp/8/8/4K3/5Q2/PPPP1PPP/RN3BNR
cond cavaliermaj (2023-06-16)
more ...
comment
Keywords: Unique Proof Game, Cavalier majeur
Pieces: su = Nightrider (N)
Genre: Retro, Fairies
FEN: r*2nbqkb*2nr/pppp1ppp/8/8/4K3/5Q2/PPPP1PPP/R*2N3B*2NR
Input: Gerd Wilts, 1996-06-16
Last update: A.Buchanan, 2021-02-19 more...
53 - 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...
54 - P0006492
Thierry Le Gleuher
601v Europe Echecs 438 10/1995
P0006492
(16+13) C+
BP in 21,0
1. h4 a5 2. h5 Ta6 3. h6 Tb6 4. hxg7 Tb3 5. Th6 b5 6. Ta6 h5 7. axb3 h4 8. Ta4 h3 9. Th4 h2 10. c4 h1=T 11. Dc2 Th3 12. Dg6 Tc3 13. Th1 Thh3 14. Db6 Thf3 15. exf3 a4 16. Ld3 a3 17. Le4 a2 18. d3 a1=T 19. Le3 Ta4 20. Ld4 Tb4 21. Ta1 Ta4
play all play one stop play next play all
White Rooks are permuted. Black Rooks are promotees. A very nice maneuver.
Moldenhauer: Computerprüfung: C+ Stevio 1.11 00:49:45 Minuten.(hh:mm:ss)
Keine Lösung: BP20.0, BP 20.5. (2023-03-16)
Henrik Juel: Hello Moldenhauer
Your tests with Stelvio are much appreciated
Did you notice any improvement by version 1.11 over version 1.0? (2023-03-16)
Moldenhauer: Hallo Henrik Juel
Danke! Seit der neuen Version Stelvio 1.11 hat sich die Anzahl der Strategien reduziert.
Beispiel: P1000406 von 6775 auf 4994, was natürlich das Tempo erhöht. Habe ich zufällig bemerkt.
Dieses Beispiel habe ich auch gespeichert. Herr Reto Aschwanden schrieb glaube ich auch darüber.
Bei mir laufen immer mehrere Stelvios gleichzeitig. Vielleicht ist mein Rechner deshalb
gegenüber anderen langsamer. AMD Ryzen 3950X 16 Kerne 3 Jahre alt. (2023-03-16)
Henrik Juel: Thanks, Moldenhauer (2023-03-20)
comment
Keywords: Unique Proof Game, Interchange (TT), Promotion
Genre: Retro
Computer test: Stelvio 1.11
FEN: 1nbqkbn1/2ppppP1/1Q6/1p6/r1PBB3/1PrP1P2/1P3PP1/RN2K1NR
Input: Gerd Wilts, 1996-06-16
Last update: Silvio Baier, 2023-03-20 more...
55 - P0006623
Thierry Le Gleuher
1853v Phénix 50 03/1997
3. ehrende Erwähnung
P0006623
(16+16) cooked
BP in 40.5
1. a4 h5 2. Ta3 Th6 3. Tc3 Tb6 4. Tc4 Tb3 5. Sc3 Ta3 6. b3 Ta1 7. La3 d5 8. Db1 Lf5 9. Kd1 Lh7 10. Kc1 g6 11. Kb2 Lh6 12. Da2 Tc1 13. Sb1 Le3 14. Kc3 Lb6 15. Kd3 c5 16. Ke3 Sc6 17. Kf4 Dc7+ 18. Kg5 0-0-0 19. h4 Td6 20. Th3 Tf6 21. Te3 Tf3 22. Te6 Sf6 23. Kh6 Th3 24. Kg7 Th1 25. Kf8 Dh2 26. g3 Se5 27. Tc6+ Kd7 28. Tc8 Ke6 29. Lg2 Kf5 30. Le4+ Kg4 31. Sf3 Kh3 32. Lf5+ Kg2 33. Tg4 Lg8 34. Sd4 Sh7+ 35. Ke8 Sf3 36. Kd7 Kf1 37. Te8 Ke1 38. Kc8 Kd1 39. Kb8 Te1 40. Lc8 Sg1 41. f3
play all play one stop play next play all
Yoav Ben-Zvi: The cook found in P0002554 re-opens the question of the current length record for unique capture-free SPG. A search in PDB finds this problem, assuming it is sound, to be the record holder, until Unto Heinonen publishes a correction (expected very soon). Prior to publication of this problem the record was 38.5, in Michel Caillaud's P0002187. (2019-07-10)
Michel Caillaud: cooked (testing last moves with Jacobi 0.7.5 and constraints) :
16...Sd7 17.h4 Tc8 18.Th3 Tc6 19.Kf4 Te6 20.Tf3 Te3 21.Kg5 Db8 22.Tf6 Th3 23.Tc6 Sgf6 24.Kh6 Th1 25.Kg7 Dh2 26.g3 Se5 27.Lg2 Kd7 28.Tc8 Ke6 29.Kf8... (2021-02-13)
James Malcom: And thus, another giant falls. (2021-02-13)
A.Buchanan: Did Unto find a fix? (2021-02-14)
Michel Caillaud: Unto published a correction of P0002554 in StrateGems (42,5 moves, january 2020), not C+ of course... (2021-02-14)
James Malcom: May you input it into PDB please, Michel? (2021-02-14)
James Malcom: Thanks for the email, Michel. Unto's correction can now be seen in the database: P1386520 (2021-02-15)
more ...
comment
Keywords: Unique Proof Game, Capture-free, Move Length Record
Genre: Retro
FEN: 1KB1R1b1/pp2pp1n/1b4p1/2pp3p/P2N2RP/BP3PP1/Q1PPP2q/1Nrkr1n1
Reprints: H34 FIDE Album 1995-1997 2004
Input: Gerd Wilts, 1996-07-07
Last update: James Malcom, 2021-02-16 more...
56 - P0006644
Chris Patzke
9260 Die Schwalbe 159, p. 391, 06/1996
2. Preis Abt. II
P0006644
(13+14)
BP in 16.0
Zeroposition
a) sD nach f3
b) +wBe3
a) 1. d3 a5 2. Lg5 a4 3. Lxe7 Kxe7 4. Kd2 Kd6 5. Kc3 Se7 6. Kb4 Sec6+ 7. Ka3 Le7 8. Sd2 Te8 9. Sf3 Lf8 10. Dd2 Txe2 11. Td1 Te5 12. Le2 Tea5 13. Se5 Df6 14. Lg4 Df3 15. Lxd7 Kd5+ 16. b4 axb3ep+
b) 1. b3 a5 2. La3 a4 3. Lxe7 axb3 4. Lb4 Df6 5. La5 Ke7 6. e3 Kd6 7. Lb5 Se7 8. Lxd7 Sec6 9. d3 Le7 10. Sd2 Te8 11. Sf3 Lf8 12. Dd2 Te5 13. 0-0-0 Tc5 14. Se5 Kd5 15. Kb2 Dd6 16. Ka3 Tcxa5+
play all play one stop play next play all
Henrik Juel: should the diagram have sD on d6? (2021-01-24)
Henrik Juel: With this change part a) (i.e. the current diagram position) is C+ Euclide 1.01
For part b) I stopped the test without results at pos. 62 after many hours (2021-01-25)
Hans-Jürgen Manthey: auch hier klappt der Player nur mit Änderungen:
bei a) 9. Sdf3
bei b) 11. Sdf3 (2021-01-25)
comment
Keywords: Unique Proof Game, En passant, Castling
Genre: Retro
FEN: rnb2b2/1ppB1ppp/2n5/r2kN3/8/Kp1P1q2/P1PQ1PPP/3R2NR
Input: Gerd Wilts, 1996-07-11
Last update: James Malcom, 2021-01-24 more...
57 - P0007029
Philippe Leroy
623 Europe Echecs 447 07/1996
P0007029
(12+13) cooked
BP in 32,0
1. h4 Sf6 2. h5 Se4 3. h6 Sg5 4. hxg7 h5 5. a4 h4 6. a5 h3 7. a6 h2 8. axb7 hxg1=S 9. Ta6 Th2 10. Tg6 fxg6 11. e4 Kf7 12. Dh5 gxh5 13. e5 Kg6 14. e6 Kh6 15. exd7 e5 16. c4 e4 17. c5 e3 18. c6 Lc5 19. Sa3 Dg8 20. d8=S e2 21. Se6 exf1=L 22. Sf4 Le6 23. Sh3 Sd7 24. b8=D La2 25. Db3 Tb8 26. Dd1 Tb3 27. f4 Tf3 28. Sc2 Db3 29. g8=L Lb5 30. Lc4 a6 31. Lf1 Se2 32. Sg1 Lf2+
play all play one stop play next play all
paul: Correction of P0005875. (2011-06-02)
paul: Dans une version ultérieure, Mr.Leroy a remplacé 30.-a6 avec 30.-a5. Dans un e-mail, il m'a expliqué: La version de ce problème avec 30...a6 a été démolie par Thierry le Gleuher, d'une manière presque plus compliquée que la solution
de l'auteur. En résumé de sa démolition, le PN en a6 peut n'avoir joué qu'un seul coup, mais par b7xa6!
La version avec le PN en a5 est donc une correction de ce grave défaut.
Donc, Thierry, quel était cette démolition explicitement? (2011-06-09)
paul: Démoli(T. le Gleuher) : 1.c4 g5 2.Da4 g4 3.D×a7 g3 4.f4 g×h2 5.Df2 Ta3 6.Rd1 Tf3 7.a4 e5 8.a5 e4 9.a6 e3 10.Ta5 e×f2 11.Ch3 Cf6 12.Tg1 h×g1=C 13.Th5 Ce4 14.c5 Cg5 15.c6 Fc5 16.e4 0-0 17.Fc4 f1=F 18.F×f7+ Rg7 19.e5 Fb5 20.Fc4 Tf6 21.Ff1 Ce2 22.Cg1 Dg8 23.e6 Th6 24.Th1 Th2 25.e×d7 h5 26.d8=D Fe6 27.Dd3 Fa2 28.Dc2 Db3 29.Re1 Rh6 30.Dd1 b×a6 31.Ca3 Cd7 32.Cc2 Ff2?
La correction avec 30.-a5 a été publié dans Europe-Échecs 452/1997. (2011-06-12)
Joost de Heer: The position with a5 is also cooked:
1. h4 Nf6 2. h5 Ne4 3. h6 Ng5 4. hxg7 h5 5. a4 h4 6. a5 h3 7. a6 h2 8. axb7 hxg1=N 9. Ra6 Rh2 10. Rg6 a5 11. e4 fxg6 12. Qh5 Kf7 13. e5 gxh5 14. e6+ Kg6 15. exd7 e5 16. Na3 e4 17. c4 e3 18. c5 e2 19. c6 Bc5 20. f4 Qg8 21. d8=N Be6 22. Nf7 Nd7 23. b8=Q Ba2 24. Qb3 exf1=B 25. Ne5+ Kh6 26. Qd1 Qb3 27. g8=B Bb5 28. Bc4 Re8 29. Bf1 Ne2 30. Nf3 Re3 31. Ng1 Rf3 32. Nc2 Bf2# (2023-07-26)
comment
Keywords: Unique Proof Game, Pronkin Theme (DLS)
Genre: Retro
FEN: 8/2pn4/p1P4k/1b4np/5P2/1q3r2/bPNPnbPr/2BQKBNR
Input: Gerd Wilts, 1996-08-12
Last update: Gerd Wilts, 2004-08-29 more...
58 - P0007036
Noam D. Elkies
3370 U.S. Problem Bulletin 102/103 07-10/1995
Lob
P0007036
(15+13) C+
BP in 17.5
1. a4 b6 2. a5 Lb7 3. a6 Dc8 4. axb7 Sa6 5. b8=L Db7 6. f3 Dc6 7. f4 Dc3 8. dxc3 Kd8 9. Le3 Kc8 10. Lc5 Kb7 11. Lb4 Kc6 12. La5 bxa5 13. e3 Kb6 14. Lb5 Kb7 15. Se2 Kc8 16. Tf1 Kd8 17. Tf3 Ke8 18. Dxd7#
play all play one stop play next play all
D. Meinking: Comm., USPB 1995-1997 (2002-07-06)
Moldenhauer: Computerprüfung: C+ Natch 3.3 in 45 Std. 46 Min.
Bei 16.5, 17.0 keine Lösung. BP 18.0 64 Lösungen.
C+ Euclide 1.11 in 44 Std. 07 Min. (2023-01-10)
A.Buchanan: This is a cool problem with tempo loss for both players (bK9 & wPf2). Noam likes to end proof games with checkmate, and in this case I guess it serves to eliminate shorter solutions which would otherwise save half a move. Checking 16.5 is sufficient for soundness. Thanks for taking the time to test. (2023-01-11)
A.Buchanan: Bit baffled how there can be 64 solutions in 18.0 moves since White just moved. 18.5 maybe? (2023-01-11)
ras@bsiag.com: Quickly checked because 45h seemed a lot for only 17.5 moves and only a few captures: Stelvio 0.98 is done in 210 seconds. (2023-01-11)
ras@bsiag.com: Well, Stelvio treats shorter solutions of same parity as cooks, so any shorter solution in 16.5, 15.5 etc would have been found by checking for 17.5. But anyhow, quickly checking 16.5 is done in a few seconds, finding no solution (of course). (2023-01-12)
more ...
comment
Keywords: Unique Proof Game, Promenade (K), Tempo Loss (sK9 wBf2), Prenix (L), Obvious promotion (L)
Genre: Retro
Computer test: Computerprüfung: C+ Natch 3.3 in 45 Std. 46 Min. Bei 16.5, keine Lösung.
FEN: rB2kbnr/p1pQpppp/n7/pB6/5P2/2P1PR2/1PP1N1PP/RN2K3
Input: Gerd Wilts, 1996-08-12
Last update: A.Buchanan, 2023-01-11 more...
59 - P0007039
Andrey Frolkin
3406 U.S. Problem Bulletin 102/103 07-10/1995
P0007039
(12+16) C+
BP in 27,0
1. Sf3 a5 2. Sd4 a4 3. Sb3 axb3 4. a3 Ta4 5. Ta2 bxa2 6. Tg1 axb1=S 7. Th1 Sc3 8. Tg1 Se4 9. c3 Sg3 10. Dc2 Sh1 11. Dg6 hxg6 12. Kd1 Th5 13. Kc2 Sh6 14. Kd3 Td5+ 15. Ke3 e5 16. Kf3 Dh4 17. Ke3 Lc5+ 18. Kf3 La7 19. h3 b6 20. Ke3 La6 21. Kf3 Ld3 22. Ke3 Lf5 23. Kf3 e4+ 24. Ke3 Sg4+ 25. Kf4 Dh8 26. Kg5 f6+ 27. Kf4 g5+
play all play one stop play next play all
Moldenhauer: Computerprüfung: C+ Stelvio 1.11 5 Sekunden.
Keine Lösung: BP 26.0, BP 26.5. (2023-03-30)
comment
Keywords: Unique Proof Game, Promenade, Non-standard material, Pendulum (K x9), Promotion
Genre: Retro
Computer test: Stelvio 1.11
FEN: 1n2k2q/b1pp2p1/1p3p2/3r1bp1/r3pKn1/P1P4P/1P1PPPP1/2B2BRn
Input: Gerd Wilts, 1996-08-12
Last update: James Malcom, 2023-05-02 more...
60 - P0007041
Noam D. Elkies
3408 U.S. Problem Bulletin 102/103 07-10/1995
P0007041
(16+16) C+
BP in 16,0
1. c3 g5 2. Da4 g4 3. Df4 d5 4. h3 d4 5. Dh2 g3 6. Kd1 Lg4 7. Kc2 e6 8. Kd3 Lb4 9. Ke4 c5 10. Ke5 Sc6+ 11. Kf4 Df6+ 12. Ke4 Sge7 13. Kd3 0-0 14. Kc2 Kh8 15. Kd1 Tg8 16. Ke1 Taf8
play all play one stop play next play all
Moldenhauer: Ergänzung: Stelvio 1.2. Keine Lösung BP 15.0, BP 15.5. (2023-05-20)
comment
Keywords: Unique Proof Game, Castling, Tempo Loss (K11), Capture-free
Genre: Retro
Computer test: Stelvio 1.2, 27sec
FEN: 5rrk/pp2np1p/2n1pq2/2p5/1b1p2b1/2P3pP/PP1PPPPQ/RNB1KBNR
Input: Gerd Wilts, 1996-08-12
Last update: Reto, 2023-05-14 more...
61 - P0007474
Kostas Prentos
5673v feenschach 1989
1. ehrende Erwähnung
P0007474
(11+14) cooked
BP in 15,0
1. a4 e6 2. Ta3 Ld6 3. Tb3 Lg3 4. Tb6 axb6 5. hxg3 Txa4 6. Th6 Ta1 7. Tg6 hxg6 8. Sa3 Th1 9. Sc4 Dh4 10. Sa5 bxa5 11. gxh4 b6 12. g3 Lb7 13. Lh3 Lg2 14. Lg4 Lh3 15. Lh5 gxh5
play all play one stop play next play all
Version zur inkorrekten P0002312
Cook: 1. a3 e6 2. h4 Lxa3 3. Sxa3 h5 4. Sb5 Th6 5. Ta6 Tf6 6. Tb6 Tf3 7. Sd4 Th3 8. Sc6 Txh1 9. Sxd8 axb6 10. Sc6 Ta1 11. Sa5 bxa5 12. g3 b6 13. Lg2 Lb7 14. Kf1 Lxg2+ 15. Ke1 Lh3
Kostas Prentos: Here is a computer tested correction: PG 12,5

1. a4 e6 2. Ta3 Ld6 3. Tb3 Lg3 4. Tb6 axb6 5. hxg3 Txa4 6. Th6 Ta1 7. Tg6 hxg6 8. Sa3 Th1 9. Sc4 Dh4 10. Sa5 bxa5 11. e3 b6 12. Dh5 gxh5 13. gxh4

C+ Euclide v1.11 (42 h 2 min 37 sec} (2022-12-08)
more ...
comment
Keywords: Unique Proof Game
Genre: Retro
Computer test: cooked by Stelvio 0.92
FEN: 1n2k1n1/2pp1pp1/1p2p3/p6p/7P/6Pb/1PPPPP2/r1BQK1Nr
Reprints: feenschach 115 01-09/1995
Input: Gerd Wilts, 1996-08-31
Last update: A.Buchanan, 2022-12-04 more...
62 - P0007482
Alexander Kislyak
6848v feenschach 116 10/1995
Peter Kniest zum Gedenken
P0007482
(12+11) cooked
BP in 13.5

Autor: "Reines Epaulettenmatt durch Rochade (vgl. mit f-111/6634)."
Moldenhauer: Computerprüfung: C+ Stelvio 1.2 03:15:11 Stunden. (hh:mm:ss)
C+ Euclide 1.11 01:00:47 Stunde.
Stelvio und Euclide finden nur 1 Lösung! Warum cooked?
Keine Lösung: BP12.5, BP 13.0.
Notation: 1.a4 Sf6 2.a5 Tg8 3.a6 bxa6 4.Txa6 Lb7 5.Txf6 a5 6.Txf7 Sa6
7.Txf8+ Kxf8 8.h4 De8 9.h5 Dxh5 10.f3 Dxf3 11.Sh3 Da3 12.e3 Te8
13.Lxa6 Lc8 14.0–0+#
Epaulettenmatt durch Rochade ist OK. (2023-05-28)
comment
Keywords: Unique Proof Game, Castling
Genre: Retro
FEN: 2b1rkr1/2ppp1pp/B7/p7/8/q3P2N/1PPP2P1/1NBQ1RK1
Reprints: (2) Die Schwalbe 164 04/1997
Input: Gerd Wilts, 1996-08-31
Last update: James Malcom, 2021-01-24 more...
63 - P0007513
Friedrich Hariuc
2546 feenschach 43 08-11/1978
P0007513
(13+13) C+
BP in 20,0
Welche Rochade(n) muß(müssen) ausgeführt werden?
1. g3 d6 2. Lg2 Ld7 3. Lc6 Dc8 4. Lb5 Lc6 5. Sf3 Sd7 6. 0-0 Sb6 7. Kh1 Dh3 8. Tg1 Df1 9. Sc3 Dxd1 10. Sd5 Dxc1 11. Sxe7 Dxa1 12. Sg6 Se7 13. Sxh8 Sg6 14. Kg2 Df1+ 15. Kxf1 Le7 16. Ke1 Kf8 17. Kd1 Kg8 18. Kc1 Tf8 19. Td1 Sa8 20. Se1 Lh1
play all play one stop play next play all
Moldenhauer: Computerprüfung: C+ Stelvio 2.1 ca. 30 Minuten. 3S/12P 64 GB Hash.
Der Cook ist keine Cook weil die Endstellung nicht mit dem Diagramm
zusammenstimmt. Letzter Zug Lf3?
Nur die weiße kleine Rochade fand wirklich statt.
Keine Lösung: BP 19.5. (2024-03-24)
A.Buchanan: Please forgive me for being stubborn, but I don't think just checking BP20.0 & BP19.5 is sufficient for C+. The test must include BP19.0 & BP18.5, and these should be very quick to test compared to the first two. They can be done first, which would allow for some short cooks to be identified more quickly. Maybe Stelvio could offer an option for this "fourfold" test, to save on typing, which is the main inconvenience? (2024-03-25)
Moldenhauer: Hi Andrew, diese Frage hatten wir schon einmal. Damals antwortete Reto darauf.
In der Dokumentation zu Stelvio 2.1, Seite 6 unten und Seite 7 oben, steht die Erklärung. (2024-03-25)
A.Buchanan: Thanks Moldenhauer. Yes, Reto responded today to say: "Actually 20 and 19.5 are sufficient, Stelvio always checks for any solutions of same parity, so 20 includes 19, 18, ... and 19.5 includes 18.5, 17.5... I can see your point with adding an option for automatic double checking, I've added it to my list."
That's great, so in my opinion the PDB C+ report needs to indicate that Stelvio has also tested for the shorter solutions of the same parity, as this is tool-dependent behaviour which future readers might not know. Ideally this statement would appear at the end of the Stelvio output, as a kind of "certificate" that could be copied to PDB.
A problem with this whole issue is that there are different choices being made by different people. It complicates things unnecessarily. I think C+ for a PG should mean that the three shorter lengths have also been explored. This should be doable without getting into the fraught question of whether a shorter solution cooks a PG, although in my opinion it does, whatever the parity: a PG is just a diagram. Conceptually to me, PG in x.y is just SPG, with a courtesy hint to the solver of what length they are looking for. (2024-03-26)
comment
Keywords: Unique Proof Game, Castling, Castling Paradox (wk hidden wdsk fake)
Genre: Retro
Computer test: C+ Stelvio 2.1 ca. 30 Minuten. 3S/12P 64 GB Hash
FEN: n4rkN/ppp1bppp/3p2n1/1B6/8/6P1/PPPPPP1P/2KRN2b
Input: Gerd Wilts, 1996-08-31
Last update: James Malcom, 2024-03-25 more...
64 - P0008204
Unto Heinonen
3230 U.S. Problem Bulletin 99/100 01-04/1995
1. Preis
P0008204
(13+15) C+
BP in 27,0
1. g4 a5 2. g5 a4 3. g6 a3 4. gxh7 axb2 5. a4 bxa1=T 6. Lb2 g5 7. Lg7 b5 8. Lh6 Lg7 9. a5 Lc3 10. a6 Sf6 11. a7 Tg8 12. h8=S Lb7 13. Sg6 Lxh1 14. Sf4 Sc6 15. Sh5 Db8 16. f4 Db6 17. Sf3 0-0-0 18. a8=L Se5 19. Le4 Ta8 20. Lh7 La5 21. Sc3 g4 22. Da1 g3 23. Sd1 g2 24. Dd4 Tg3 25. Dg1 Th8 26. Sd4 Ta3 27. c3 Ta1
play all play one stop play next play all
D. Meinking: 1st Prize, USPB 1995-1997 (2002-07-06)
paul: The report of the judge G. Lauinger in StrateGems 19/2002 (2021-10-29)
comment
Keywords: Unique Proof Game, Interchange (ttt), Castling, Promotion
Genre: Retro
Computer test: C+ by Stelvio beta from Reto Aschwanden
FEN: r1k4r/2pppp1B/1q3n1B/bp2n2N/3N1P2/2P5/3PP1pP/r2NKBQb
Reprints: feenschach 153 10-12/2003
Input: Gerd Wilts, 1996-09-11
Last update: A.Buchanan, 2022-11-27 more...
65 - P0008459
Jasper van Atten
972 Probleemblad 2 1985
P0008459
(13+15) cooked
BP in 25,0

play all play one stop play next play all
Cook: 1. a4 Sc6 2. a5 Se5 3. a6 Sc4 4. axb7 a5 5. b8=S a4 6. Sc6 dxc6 7. g4 Dd4 8. g5 Dh4 9. d4 Lf5 10. Dd2 Sf6 11. g6 Sd5 12. Dh6 gxh6 13. g7 Lg6 14. g8=S f5 15. Sf6+ exf6 16. b4 Se7 17. d5 Kd7 18. d6 Ke6 19. d7 Tg8 20. d8=D Lg7 21. Dd1 Lh8 22. b5 Tg7 23. b6 Tf8 24. b7 Tff7 25. b8=D Sg8
Moldenhauer: Die hier genannte Lösung Cook: hat am Ende die schwarze Dame auf h4
und den schwarzen Springer auf e7. Die FEN sind anders. Bitte löschen.
Autorenlösung? FEN?
Computerprüfung: FEN:1Q4nb/2p2rrp/2p1kpbp/5p1q/p1n5/8/2P1PP1P/RNBQKBNR
Cooked Stelvio 1.4 nach 3 Sekunden. Keine Lösung: BP 24.5.
Stelvio Beispiel: 1.a4 Sc6 2.d4 Sa5 3.d5 Sc4 4.d6 a5 5.g4 b5 6.axb5 a4
7.b6 f5 8.b7 Kf7 9.b8=S Ke6 10.Sc6 De8 11.g5 dxc6 12.d7 Dh5 13.d8=D Ld7
14.g6 Le8 15.D8d2 Sf6 16.Dh6 gxh6 17.g7 Lg6 18.g8=T Lg7 19.Tf8 Tg8
20.b4 Lh8 21.b5 Tg7 22.b6 Sg8 23.Tf6+ exf6 24.b7 Tf8 25.b8D Tff7 (2023-07-29)
comment
Keywords: Unique Proof Game
Genre: Retro
FEN: 1Q4nb/2p2rrp/2p1kpbp/5p1q/p1n5/8/2P1PP1P/RNBQKBNR
Input: Gerd Wilts, 1996-10-19
Last update: Gerd Wilts, 2004-08-11 more...
66 - P0008480
Henrik Juel
6927 Thema Danicum 85 01/1997
3. ehrende Erwähnung
P0008480
(15+15) C+
BP in 6.0
b) wKe1->d1
a) 1. b4 e6 2. La3 Ke7 3. Dc1 Kd6 4. b5+ c5 5. bxc6ep+ Kxc6 6. Le7 d6
b) 1. b4 c5 2. La3 cxb4 3. Lxb4 e6 4. Le7 d6 5. Dc1 Kd7 6. Kd1 Kc6
play all play one stop play next play all
Henrik Juel: This problem was incorrectly printed as 6842 TD 84 10/1996, so it was discarded and did not participate in the 1996 informal tourney
It was correctly printed in the next issue as 6927 TD 85 1/1997 and won the award in the 1997 informal tourney (2021-05-21)
Henrik Juel: Thanks, Andrew (2021-05-21)
A.Buchanan: Nicely done, Henrik (2021-05-22)
comment
Keywords: Unique Proof Game, En passant
Genre: Retro
FEN: rnbq1bnr/pp2Bppp/2kpp3/8/8/8/P1PPPPPP/RNQ1KBNR
Input: Gerd Wilts, 1996-11-02
Last update: A.Buchanan, 2021-05-22 more...
67 - P0008537
Michel Caillaud
615v Europe Echecs 452 01/1997
P0008537
(14+9) C+
BP in 21,5
1. d3! Sc6 2. d4 Se5 3. dxe5 Sf6 4. exf6 Tg8 5. fxg7 f6! 6. gxf8=S Tg3 7. hxg3 f5 8. Th6 f4 9. Td6 exd6 10. Se6 Dh4 11. Sc5 Dh3 12. gxh3 h6! 13. Lg2 h5 14. Lc6 dxc6 15. Kf1 Le6 16. Kg2 Lb3 17. axb3 0-0-0 18. Ta6 Td7 19. Tb6 a6! 20. Sa4 a5 21. Ta6 c5 22. Ta8#
play all play one stop play next play all
Vladimir Rey: C+ Natch 3.2 - Solution found: 1. Positions analysed: 51578. Resolution time: 5 h 33 mn 32.84 s. (2020-05-08)
Vladimir Rey: Check please: Keywords Tempo Loss. (2022-09-05)
comment
Keywords: Unique Proof Game, Castling, Tempo Loss (Bbb), Non-standard material (S), Cross-capture
Genre: Retro
Computer test: Natch 3.2
FEN: R1k5/1ppr4/3p4/p1p4p/N4p2/1P4PP/1PP1PPK1/1NBQ2N1
Reprints: H14 FIDE Album Annexe 1995-1997 2004
Input: Gerd Wilts, 1997-01-02
Last update: A.Buchanan, 2020-05-08 more...
68 - P0008564
Unto Heinonen
Springaren 1995
P0008564
(8+16) C+
BP in 25,0
1. b4 Sh6 2. b5 Sf5 3. b6 axb6 4. g4 Ta4 5. g5 Tb4 6. g6 hxg6 7. a4 Th5 8. a5 Tg5 9. a6 bxa6 10. h4 Lb7 11. h5 Dc8 12. h6 gxh6 13. f4 Sg7 14. f5 Kd8 15. f6 exf6 16. c4 Ld6 17. c5 Lf4 18. c6 dxc6 19. d4 Sd7 20. d5 Sf8 21. d6 cxd6 22. e3 Kc7 23. e4 Kb8 24. e5 Ka8 25. e6 fxe6
play all play one stop play next play all
Alle schwarzen Bauern schlagen überkreuz.
s.a. Version P1214063
Joost de Heer: Compare with P1000230. (2022-08-05)
Henrik Juel: 6 hours with Euclide 1.01 produced nothing (2022-08-05)
comment
Keywords: Unique Proof Game, Homebase (W), Ornament, Cross-capture
Genre: Retro
Computer test: C+ by Stelvio beta from Reto Aschwanden
FEN: k1q2n2/1b4n1/pppppppp/6r1/1r3b2/8/8/RNBQKBNR
Reprints: Die Schwalbe 181 02/2000
H29 FIDE Album 1995-1997 2004
18a 64 Proof Games 2012
Input: Gerd Wilts, 1997-01-09
Last update: A.Buchanan, 2022-11-28 more...
69 - P0008565
Unto Heinonen
Thema Danicum 1996
3. ehrende Erwähnung
P0008565
(12+12) C+
BP in 19,5
1. Sc3 Sf6 2. Se4 Sxe4 3. b4 Sxf2 4. e4 h5 5. Dxh5 Txh5 6. Se2 Tc5 7. Sg3 d5 8. Le2 Ld7 9. 0-0 Sd3 10. Txf7 Sxc1 11. Txg7 Sb3 12. Tg6 Kf7 13. axb3 Le8 14. Ta5 Dd7 15. Tb5 a5 16. h4 a4 17. h5 a3 18. h6 a2 19. h7 a1=S 20. h8=S#
play all play one stop play next play all
James Malcom: The $100 theme in a proofgame; a fantastic problem! (2021-03-09)
comment
Keywords: Unique Proof Game, Castling, 100 Dollar task, Promotion (Ss), Phoenix (Ss)
Genre: Retro
Computer test: Resolution time : 1 mn 30.33 s., Natch 2.3 Copyright (C) 1997,98,99,2001,2002,2003,2004 Pascal Wassong
FEN: rn2bb1N/1ppqpk2/6R1/1Rrp4/1P2P3/1P4N1/2PPB1P1/n5K1
Input: Gerd Wilts, 1997-01-09
Last update: A.Buchanan, 2021-04-06 more...
70 - P0008653
Thierry Le Gleuher
12858v British Chess Magazine 1993
2. ehrende Erwähnung
P0008653
(15+15) C+
BP in 24,0
1. a4 Sf6 2. Ta3 Sd5 3. Tc3 Sb4 4. Txc7 Sa2 5. Tc3 Da5 6. h4 b6 7. Tch3 La6 8. g3 Ld3 9. Lg2 Sa6 10. Ld5 0-0-0 11. Sf3 Kb8 12. 0-0 Tc8 13. Th1 Tc3 14. Lc4 Ta3 15. b3 Ka8 16. Lb2 Sb8 17. Lf6 exf6 18. Dc1 Le7 19. Db2 Tc8 20. Dd4 Tc5 21. Sc3 Th5 22. Ta1 Dg5 23. Kf1 f5 24. Ke1 Lf6
play all play one stop play next play all
paul: Checked with Euclide for the first 19 moves (~45 min) (2014-07-04)
more ...
comment
Keywords: Unique Proof Game, Interchange (TT), Castling, Castling Paradox
Genre: Retro
Computer test: Moldenhauer: Computerprüfung: C+ Stelvio 1.11 00:02:47 Minuten. (hh:mm:ss) Keine Lösung: BP 23.0, BP 23.5.
FEN: kn6/p2p1ppp/1p3b2/5pqr/P1BQ3P/rPNb1NP1/n1PPPP2/R3K2R
Input: Gerd Wilts, 1997-05-19
Last update: A.Buchanan, 2023-04-01 more...
71 - P0008654
Ronald Turnbull
12857 British Chess Magazine 1993
Lob
P0008654
(15+14) C+
PG in exactly 11,5
1. g4 e6 2. g5 Ke7 3. g6 Kf6 4. gxh7 Kg6 5. hxg8=S Th3 6. Se7+ Kh7 7. Sc6 dxc6 8. Lg2 Sd7 9. Ld5 Sf6 10. Lf3 Dd5 11. Lg2 Ld7 12. Lf1
play all play one stop play next play all
A.Buchanan: I imagine that e.g. 12. ... Tc8 would allow the removal of the "exactly" limitation, which is unsavory in a tempo problem. (2018-12-12)
A.Buchanan: Yes confirmed C+ BP 12.0 after 12. ... Tc8 with Euclide 1.11. (2018-12-12)
A.Buchanan: Ronald wrote: As far as i'm concerned a game in 11 moves doesn't solve a proof game in 11.5 moves. The normal stipulation (in those days, in English) was "Position after White's 12th move. What was the game?" Which is specific and is in English, as against "PG11.5".

I happen to disagree with Ronald's position on the vexed "exactly" question, particularly for a tempo problem. But I do defend his right to retain his original stipulation associated with the problem. It is part of his creative work and as a matter of respect, scholarship and insurance it should never be over-written. There is a dependency in PDB between the animation and the diagram stipulation, which encourages over-writing. We need a unicode Originalforderung field (or maybe keyword parameter) which can contain the original stipulation in its entirety. Obviously most stipulations are unaffected, but retros are more vulnerable. Having the Originalforderung field would also free up the diagram stipulation for *greater* automation (e.g. standardization on language, helpmate, try, set play, decimal-comma-or-decimal-point, which would allow much more focused search than is available now, and a similar kind of auto-translation to what occurs in keywords and fairy pieces today). (2020-12-30)
more ...
comment
Keywords: Ceriani-Frolkin Theme (S), Unique Proof Game, Homebase (w), Tempo Loss (L)
Genre: Retro
Computer test: Natch 3.1 (1 sec.)
FEN: r4b2/pppb1ppk/2p1pn2/3q4/8/7r/PPPPPP1P/RNBQKBNR
Input: Gerd Wilts, 1997-05-19
Last update: A.Buchanan, 2020-12-31 more...
72 - P0008667
Maryan Kerhuel
Didier Innocenti

2524 Phénix 51 04/1997
P0008667
(9+15) cooked
BP in 15,0
Circe Assassin
paul: Cooked by: 1.h3 d5 2.Rh2 Bxh3(ph2) 3.Sxh3(Bc8) Bxh3 4.g4 a5 5.Bg2 Bxg4(pg2) 6.c4 a4 7.b4 e6 8.Bb2 Bxb4(pb2) 9.Sa3 Ra5 10.Qxa4(pa7) Qc8 11.QxKe8(Ke8) (suicide of wQ)b5 12.Sc2 dxc4(pc2) 13.a3 Bxe2(pe2) 14.Ra2 Bxa3(pa2) 15.Kd1 b4. (2010-06-19)
Arnold Beine: Here is something wrong. Either Paul's cook does not work, because 10.Qxa4(Pa7)+ is a check (10...Qc8??) or in the given condition "Rex inclusive" must be added. (2023-07-26)
paul: Right, Arnold. Anyway, the proof game is cooked: 1.a4 e6 2.Sa3 B×a3 3.b4 a5 4.Bb2 a×b4(b2) 5.Ra2 R×a4(a2) 6.e4 Ra5 etc, as in author's solution: 7.Ba6 b×a6(Bf1) 8.B×a6(a7) d5 9.B×c8(bBc8) Bb7 10.c4 Qc8 11.Qc2 d×c4(c2) 12.Se2 B×e4(e2) 13.h3 Bf5 14.Rh2 B×h3(h2) 15.Kd1 B×g2(g2). (2024-03-13)
comment
Keywords: Circe (Assassin), Unique Proof Game
Genre: Retro, Fairies
FEN: 1nq1k1nr/p1p2ppp/4p3/r7/1pp5/b7/PPPPPPPP/3K4
Input: Gerd Wilts, 1997-05-28
Last update: Mario Richter, 2013-09-01 more...
73 - P0008788
Noam D. Elkies
FIDE Kongress 39 Tel Aviv 1996
1. Preis
P0008788
(12+16) cooked
BP in 23,0
1. c3 c6 2. Db3 Db6 3. Kd1 Dxf2 4. Db6 axb6 5. h4 Ta3 6. Th3 Tb3 7. a4 Ta3 8. Tg3 Ta2 9. Tg6 hxg6 10. Sh3 Th5 11. Sf4 Tb5 12. h5 Tb3 13. h6 Tba3 14. b3 Tb2 15. h7 Taa2 16. Sa3 Tb1 17. h8=T Tab2 18. Ta2 Ta1 19. Th3 Tbb1 20. Tc2 Tb2 21. Sb1 Tba2 22. La3 Tb2 23. Tg3 Dxf1#
play all play one stop play next play all
Cook: 1. a4 Sa6 2. Ta3 Sb8 3. Tg3 c6 4. Tg6 hxg6 5. Sh3 Th4 6. Sf4 Tg4 7. h4 Tg3 8. Th3 Ta3 9. h5 Ta1 10. Ta3 Da5 11. c3 Db4 12. Db3 Dc5 13. Db6 axb6 14. Kd1 Ta5 15. Ta2 Tb5 16. h6 Tb3 17. h7 Ta3 18. b3 Dxf2 19. Tc2 T3a2 20. h8=T Tb2 21. Th3 ...
Michel Caillaud: cooked by Stelvio 0.93 :
1.a4 Sa6 2.Ta3 Sb8 3.Tg3 c6 4.Tg6 hxg6 5.Sh3 Th4 6.Sf4 Tg4 7.h4 Tg3 8.Th3 Ta3 9.h5 Ta1 10.Ta3 Da5 11.c3 Db4 12.Db3 Dc5 13.Db6 axb6 14.Kd1 Ta5 15.Ta2 Tb5 16.h6 Tb3 17.h7 Ta3 18.b3 Dxf2 19.Tc2 T3a2 20.h8=T Tb2 21.Th3… (2022-12-19)
comment
Keywords: Unique Proof Game
Genre: Retro
FEN: 1nb1kbn1/1p1pppp1/1pp3p1/8/P4N2/BPP3R1/1rRPP1P1/rN1K1q2
Input: Gerd Wilts, 1997-06-21
Last update: Silvio Baier, 2023-03-02 more...
74 - P0008800
Andrey Frolkin
9650 Die Schwalbe 165 06/1997
1.-2. Preis ex aequo
P0008800
(14+15) C+
KBP?
UWF sind in der Diagrammstellung
a) erlaubt
b) nicht erlaubt
a) 1. d4 e5 2. Lf4 Dg5 3. e3 f6 4. La6 bxa6 5. h4 Lb7 6. h5 Lxg2 7. h6 Lh3 8. hxg7 h5 9. Se2 Sh6 10. g8=L Lg7 11. Ld5 Tf8 12. Lb7 Sc6 13. Tf1 Td8 14. Lc8 Kf7
b) 1. h4 e5 2. h5 Dg5 3. h6 f6 4. hxg7 h5 5. d4 Sh6 6. g8=L Lg7 7. Lc4 Tg8 8. La6 bxa6 9. Lf4 Lb7 10. e3 Lxg2 11. Se2 Lh3 12. Lg2 Kf7 13. Lb7 Sc6 14. Tf1 Td8 15. Lc8
play all play one stop play next play all
Moldenhauer: Computerprüfung: a) C+ Stelvio 1.11 1 Sekunde.
Keine Lösung: BP 13.0, BP 13.5. KBP = 14.0.
b) Stelvio 1.11 hat noch keine Funktion dafür.
Die Lösung zu b) ist wegen 6. g8=L nicht korrekt. (2023-05-10)
Henrik Juel: The given solution to part b) is (probably) correct
During the play White promotes to L, but this L is captured later, so it is not in the diagram position (2023-05-10)
Moldenhauer: Danke Henrik Juel! Der Läufer ist wieder geschlagen worden und somit nicht in der Diagrammstellung.
Das Schlüsselwort "Non-standard material" deutet auch darauf hin. Also Lösung b) korrekt! (2023-05-10)
comment
Keywords: Unique Proof Game, Non-standard material
Genre: Retro
FEN: 2Br1r2/p1pp1kb1/p1n2p1n/4p1qp/3P1B2/4P2b/PPP1NP2/RN1QKR2
Reprints: Die Schwalbe 193 02/2002
Input: Gerd Wilts, 1997-06-23
Last update: Gerd Wilts, 2004-08-09 more...
75 - P0008845
Gianni Donati
62 Quartz 5 1997
P0008845
(11+11) C+
BP in 11.5
1. d4 e5 2. Lg5 Dxg5 3. a4 Dxg2 4. a5 Dxg1 5. a6 Dg6 6. axb7 a5 7. dxe5 Da6 8. Dxd7 Kxd7 9. Lh3+ f5 10. exf6ep+ Kd6 11. 0-0 Sxf6 12. bxc8=S+
play all play one stop play next play all
White consecutively plays the three thematic moves. This PG cannot be extended to move beyond the check in the final diagram.
Henrik Juel: The ep capture is well hidden, and it is not obvious that Sc8 is promoted as Sg1-c8 also takes five moves
Interesting that Euclide 1.01 is 10 times faster than Natch 2.3 here (2021-07-04)
more ...
comment
Keywords: Unique Proof Game, En passant, Castling (wk), Promotion (S), Valladao Task (www), Phoenix (S)
Genre: Retro
Computer test: C+ Natch-2.3 11m 28.52s C+ Euclide 1.01
FEN: rnN2b1r/2p3pp/q2k1n2/p7/8/7B/1PP1PP1P/RN3RK1
Input: Gerd Wilts, 1997-10-19
Last update: A.Buchanan, 2021-07-04 more...
76 - P0008940
Unto Heinonen
R019 Probleemblad 03/1998
P0008940
(8+11) C+
BP in 20,5
1. Sf3 b5 2. Sd4 Lb7 3. Sxb5 Lxg2 4. Sxa7 c6 5. Sc8 Txa2 6. Sc3 Txb2 7. Ta8 Da5 8. Sa2 Dxd2+ 9. Kxd2 Sa6 10. Kc3 Sc5 11. Dd4 Txc2+ 12. Kb4 Txe2 13. La3 Txf2 14. La6 h5 15. Ta1 Lf1 16. Dxg7 Txh2 17. Dxg8 Th4+ 18. Dg4 Lh6 19. Ka5 Lc1 20. Da4 Th6 21. Sa7#
play all play one stop play next play all
paul: Checked the first 16.5 moves with Euclide. (2014-12-04)
paul: Thr first 17.5 moves checked by Euclide (~29 hours) (2014-12-06)
more ...
comment
Keywords: Unique Proof Game, Ornament
Genre: Retro
Computer test: Computerprüfung: C+ Natch 3.3 in 302 Std. 48 Min. Lösung 1 (Stellung 3391) Notation OK.
FEN: R3k3/N2ppp2/B1p4r/K1n4p/Q6r/B7/N7/R1b2b2
Input: Gerd Wilts, 1998-06-26
Last update: A.Buchanan, 2022-11-25 more...
77 - P0008957
Gianni Donati
2700 Phénix 58 12/1997
P0008957
(15+15) C+
BP in 22,5
1. g4 d6 2. Lh3 Dd7 3. Kf1 De6 4. De1 De3 5. fxe3 Kd7 6. Dh4 Kc6 7. Dh6 gxh6 8. Sf3 Lg7 9. Tg1 Ld4 10. Tg3 Sf6 11. Lg2 Tg8 12. Th3 Tg5 13. Th5 Te5 14. Tg5 Lf5 15. Tg8 Sbd7 16. Th8 Tg8 17. Ke1 Tg5 18. Ta8 Th5 19. g5 Sg8 20. g6 Tg5 21. Lf1 Tg1 22. g7 Th1 23. Sg1
play all play one stop play next play all
Henrik Juel: This is one of the proof games that is solved faster by hand than by computer
The two captures are obvious, and the interchanged rooks make a guess like Th1-g1-g3-h3-h5-g5-g8-h8-a8 reasonable
Natch 3.1 got nowhere in an hour (2018-12-10)
Moldenhauer: Computerprüfung: C+ Stelvio 1.0 40 Sekunden.
Keine Lösung: BP 21.5, BP 22.0. (2023-02-26)
comment
Keywords: Unique Proof Game
Genre: Retro
Computer test: Stelvio 1.0
FEN: R5n1/pppnppPp/2kp3p/4rb2/3b4/4P3/PPPPP2P/RNB1KBNr
Input: Gerd Wilts, 1998-06-26
Last update: Silvio Baier, 2023-03-02 more...
78 - P0009046
Peter Wong
9923 Die Schwalbe 169 02/1998
4. Preis
P0009046
(15+14) C+
BP in 23.0
1. e4 a5 2. Ke2 a4 3. Kf3 a3 4. Kg4 axb2 5. a4 Ta6 6. a5 Ta7 7. a6 Ta8 8. a7 Sc6 9. Ta6 Sb8 10. Th6 g6 11. axb8=S Lg7 12. Sa6 Lc3 13. dxc3 Kf8 14. Dd4 De8 15. Da4 Kg7 16. Lc4 Df8 17. Se2 Dd8 18. Td1 Kf8 19. Td6 Ke8 20. Tf6 e6 21. Sd2 Se7 22. Sf3 Sc6 23. Sfg1 Sb8
play all play one stop play next play all
Je 3zügiger Tempoverlust von sTa8 und sDd8, dazu Platzwechsel (wSb1 nach g1, sSg8 nach b8) und Switchback (sSb8 und sKe8). Hervorragend!
Moldenhauer: Computerprüfung: C+ Stelvio 1.11 in 1 Sekunde.
Keine Lösung: BP 22.0, BP 22.5. (2023-03-27)
comment
Keywords: Unique Proof Game, Non-standard material, Switchback (sk), Tempo Loss (t3s2d3), Impostor (Ss)
Genre: Retro
Computer test: Stelvio 1.11
FEN: rnbqk2r/1ppp1p1p/N3pRpR/8/Q1B1P1K1/2P5/1pP1NPPP/2B3N1
Reprints: feenschach 141 06/2001
(70) Parallel Strategy 2004
H52 FIDE Album 1998-2000 2007
Input: Gerd Wilts, 1998-06-26
Last update: Silvio Baier, 2023-04-05 more...
79 - 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...
80 - P0009110
Thierry Le Gleuher
2799 Phénix 62 04/1998
P0009110
(14+13) C+
BP in 22,5
1. g3 h5 2. Lh3 Th6 3. Kf1 Te6 4. Kg2 f6 5. Kf3 Te3+ 6. Kf4 e5+ 7. Kf5 Lb4 8. Kg6 De7 9. Kh7 Dc5 10. Kxg8 d6 11. Kxg7 Lg4 12. Kg6 Lf3 13. exf3 Te1 14. Se2 Tg1 15. Kf5 Tg2 16. Te1 a5 17. Sg1 a4 18. Te3 Ta5 19. Tb3 axb3 20. Ke4 bxa2 21. Kd3 e4+ 22. Ke2 e3 23. Ke1
play all play one stop play next play all
paul: Sol.: 1.g3 h5 2.Bh3 Rh6 3.Kf1 Re6 4.Kg2 f6 5.Kf3 Re3+ 6.Kf4 e5+ 7.Kf5 Bb4 8.Kg6 Qe7 9.Kh7 Qc5 10.Kxg8 d6 11.Kxg7 Bg4 12.Kg6 Bf3 13.exf3 Re1 14.Se2 Rg1 15.Kf5 Rg2 16.Re1 a5 17.Sg1 a4 18.Re3 Ra5 19.Rb3 axb3 20.Ke4 bxa2 21.Kd3 e4+ 22.Ke2 e3 23.Ke1 (Ra4 is in a5)
The King captures an officer on its place and return.
For comparison, see P1013070 and P1007320 (2008-04-25)
Moldenhauer: Computerprüfung: C+ Stelvio 1.0 09:10:17 Stunden.
Keine Lösung: BP 21.5, BP 22.0, Prüfzeit 02:01:51 Stunden. (2023-02-17)
Reto: A good example of Stelvio's progress: Stelvio 1.5 only needs 40min on my notebook. (2023-08-19)
comment
Keywords: Unique Proof Game, Round Trip (K)
Genre: Retro
Computer test: Stelvio 1.0
FEN: 1n2k3/1pp5/3p1p2/r1q4p/1b6/4pPPB/pPPP1PrP/RNBQK1N1
Reprints: 2799v Phénix 146 12/2005
Input: Gerd Wilts, 1999-02-27
Last update: Silvio Baier, 2023-03-02 more...
81 - P0009122
Satoshi Hashimoto
2950 Phénix 69 12/1998
P0009122
(15+10) C+
BP in 19,0
1. h4 g5 2. hxg5 e5 3. Txh7 Df6 4. Txf7 Th3 5. g4 Te3 6. dxe3 Lb4+ 7. Ld2 d6 8. Lc3 Le6 9. Dd4 Lxa2 10. Sd2 Ld5 11. Txa7 Lf3 12. exf3 Se7 13. Ld3 Kd7 14. Kf1 Kc6 15. Kg2 Sd7 16. Kg3 Th8 17. Ta8 Th1 18. Sh3 Ta1 19. Tc8 Ta8
play all play one stop play next play all
Moldenhauer: Computerprüfung: Stelvio 1.4 Keine Lösung: BP 18.5. (2023-08-17)
comment
Keywords: Unique Proof Game, Pure Round Trip (t)
Genre: Retro
Computer test: Resolution time : 54.34 s., Natch 2.3 Copyright (C) 1997,98,99,2001,2002,2003,2004 Pascal Wassong
FEN: r1R5/1ppnnR2/2kp1q2/4p1P1/1b1Q2P1/2BBPPKN/1PPN1P2/8
Reprints: 2 64 Proof Games 2012
Input: Gerd Wilts, 1999-02-27
Last update: Gerd Wilts, 2012-12-23 more...
82 - P0009132
Michel Caillaud
R042 Probleemblad 01/1999
P0009132
(13+15) C+
BP in 24,0
1. g4 c5 2. Lg2 Da5 3. Lc6 Dxa2 4. Lb5 Dd5 5. Ta6 Sh6 6. Tc6 dxc6 7. b3 Lf5 8. Lb2 Sd7 9. Lf6 exf6 10. g5 Ld6 11. g6 Ke7 12. gxh7 Thb8 13. h8=T a5 14. Tc8 a4 15. Tc7 Th8 16. f3 Ke8 17. Kf2 Lf8 18. Kg3 a3 19. Kh4 Ta4+ 20. Kh5 Tg4 21. d4 Sb8 22. Dd3 Dd8 23. Sd2 Lc8 24. Dh7 Sg8
play all play one stop play next play all
Switchback von 7 schwarzen Figuren, davon nur einer mit Schlag!
Henrik Juel: Natch 3.1 made no progress after half an hour (2018-12-13)
more ...
comment
Keywords: Unique Proof Game, Pure Round Trip (d), Switchback (sldklst), Promotion (T)
Genre: Retro
Computer test: Moldenhauer: Computerprüfung: C+ Stelvio 1.11 00:03:45 Minuten. (hh:mm:ss) Keine Lösung: BP 23.0, BP 23.5.
FEN: 1nbqkbnr/1pR2ppQ/2p2p2/1Bp4K/3P2r1/pP3P2/2PNP2P/6NR
Input: Gerd Wilts, 1999-02-27
Last update: A.Buchanan, 2023-04-01 more...
83 - P0009149
Andrey Frolkin
R036 Probleemblad 11-12/1998
P0009149
(14+13) C+
BP in 26,0
1. h4 d5 2. h5 d4 3. h6 d3 4. hxg7 dxc2 5. d4 f5 6. Ld2 c1=L 7. Da4+ Kf7 8. Dxa7 e5 9. La5 Lh6 10. Sa3 f4 11. 0-0-0 e4 12. Kc2 e3 13. Kb3 exf2 14. Sc2 La3 15. Ka4 Se7 16. b4 Te8 17. g8=T Lf8 18. Th6 Lh3 19. gxh3 Lc1 20. Lg2 f1=L 21. Lc6 Dd5 22. Lb5 Sbc6 23. h4 Tad8 24. Sh3 Td6 25. Sf2 Lh3 26. a3 Lc8
play all play one stop play next play all
paul: Here, we have also an interchange between Bc1 and Bf8. (2018-03-21)
Henrik Juel: The months should be 11-12, not 09 (2018-03-21)
Mario Richter: @Henrik: Is my guess correct that "9" might be the issue number? (i.e. issue 9 of 1998 was for the months Nov.+Dec.?) (2018-03-21)
Henrik Juel: No, Mario; I think the error might have occurred, because Andrej also had a proof game in the preceding issue
Back then PB had six issues per year, numbered 1-6 for each year (unlike Die Schwalbe), so the issue number contains little information
This problem appeared in issue 6, Nov-Dec 1998 (2018-03-21)
Henrik Juel: Natch 3.1 did not even find the solution in an hour (2018-12-10)
more ...
comment
Keywords: Unique Proof Game, Pronkin Theme (l)
Genre: Retro
Computer test: Computerprüfung: C+ Stelvio 1.11 00:49:22 Minuten. (hh:mm:ss) Keine Lösung: BP 25.0, BP 25.5. Mit Stelvio 1.19 C+ in 10:20min.
FEN: 2b1rbR1/Qpp1nk1p/2nr3R/BB1q4/KP1P1p1P/P7/2N1PN2/2bR4
Input: Gerd Wilts, 1999-02-27
Last update: Reto, 2023-05-08 more...
84 - P0009151
Gianni Donati
R038 Probleemblad 09/1998
Michel Caillaud gewidmet
1. Lob
P0009151
(14+15) C+
BP in 22,0
1. h4 Sf6 2. h5 Sd5 3. h6 gxh6 4. Sf3 Lg7 5. Tg1 Lc3 6. Se5 Kf8 7. f3 Kg7 8. Kf2 Dg8 9. Kg3 Kf8+ 10. Kh4 Dg6 11. d4 Db6 12. Kh5 Db3 13. axb3 Ke8 14. Ta6 Kd8 15. Tf6 exf6 16. Sa3 Se7 17. d5 Te8 18. Dd4 Sg8 19. Da4 Lb4 20. c4 Lf8 21. Sc2 Te7 22. Se1 Ke8
play all play one stop play next play all
more ...
comment
Keywords: Unique Proof Game, Round Trip (k), Pure Round Trip (sl)
Genre: Retro
Computer test: Computerprüfung: C+ Stelvio 1.0 00:08:49 Minuten. (hh:mm:ss) Keine Lösung: BP 21.0, BP 21.5.
FEN: rnb1kbn1/pppprp1p/5p1p/3PN2K/Q1P5/1P3P2/1P2P1P1/2B1NBR1
Input: Gerd Wilts, 1999-02-27
Last update: A.Buchanan, 2023-03-13 more...
85 - P0009164
Satoshi Hashimoto
PR16 Problem Paradise 12 01-03/1999
1. Preis
P0009164
(13+14) C+
BP in 21,5
1. a4 Sc6 2. a5 Tb8 3. a6 bxa6 4. Ta4 Tb3 5. Th4 Tc3 6. dxc3 g5 7. Dd6 exd6 8. Le3 Df6 9. Sd2 Df3 10. exf3 g4 11. Ld3 g3 12. Se2 gxh2 13. Sg3 h5 14. Ke2 Lh6 15. Ta1 h1=T 16. Taa4 Ta1 17. Th1 Ta2 18. Ta1 Sd4+ 19. Ke1 Sb5 20. Tah4 c5 21. Th1 h4 22. Lf1
play all play one stop play next play all
Henrik Juel: Natch 3.1 made no progress after half an hour (2018-12-13)
Moldenhauer: Computerprüfung: C+ Stelvio 1.11 00:06:29 Minuten. (hh:mm:ss)
Keine Lösung: BP 20.5, BP 21.0. (2023-03-16)
comment
Keywords: Unique Proof Game, Pure Round Trip (TT)
Genre: Retro
Computer test: Stelvio 1.11, Natch
FEN: 2b1k1nr/p2p1p2/p2p3b/1np5/7p/2P1BPN1/rPPN1PP1/R3KB1R
Reprints: feenschach 153 10-12/2003
9 64 Proof Games 2012
Input: Gerd Wilts, 1999-02-27
Last update: Silvio Baier, 2023-03-20 more...
86 - P0009165
Michel Caillaud
PR17 Problem Paradise 12 01-03/1999
3. ehrende Erwähnung
P0009165
(15+13) C+
BP in 22,5
1. f4 Sc6 2. f5 Tb8 3. f6 exf6 4. a4 Lb4 5. a5 Lc3 6. dxc3 De7 7. Le3 De5 8. Lxa7 b6 9. a6 Tb7 10. Lb8 Sge7 11. a7 Tg8 12. a8=L Ta7 13. Lb7 Ta8 14. h4 Sa7 15. Le4 d5 16. Lxh7 g6 17. h5 Tg7 18. h6 Dh5 19. Lg8 Lf5 20. h7 Sec8 21. h8=D Th7 22. Dg7 Th8 23. Dh7
play all play one stop play next play all
Rundlauf der sTT a8 und h8.
Henrik Juel: Natch 3.1 made no progress after half an hour (2018-12-13)
Moldenhauer: Computerprüfung: C+ Stelvio 1.0 27:15:46 Stunden.
Keine Lösung: BP 21.5, BP 22.0. (2023-02-18)
comment
Keywords: Unique Proof Game, Pure Round Trip (tt), Promotion
Genre: Retro
Computer test: Stelvio 1.0
FEN: rBn1k1Br/n1p2p1Q/1p3pp1/3p1b1q/8/2P5/1PP1P1P1/RN1QKBNR
Input: Gerd Wilts, 1999-02-27
Last update: Silvio Baier, 2023-03-03 more...
87 - P1000002
Ayako Okaya
R035 Problem Paradise 17 01-03/2000
P1000002
(14+16) C+
BP in 15.0
1. e3 d6 2. De2 Le6 3. Da6 Lc4 4. Ld3 e6 5. Se2 Dh4 6. 0-0 Le7 7. f3 De1 8. a3 Dxc1 9. Kf2 Dxb1 10. Th1 Da2 11. Taf1 Kf8 12. Ke1 Lh4+ 13. Kd1 Lf2 14. Kc1 Lg1 15. Td1 Da1#
play all play one stop play next play all
Henrik Juel: The paradox is explained by the need for Black to play De1xLc1
Natch 3.1 made no progress after an hour (2018-12-14)
Moldenhauer: Computerprüfung: C+ Stelvio 1.0 14:25:47 Stunden.
Keine Lösung: BP 14.0, BP 14.5. (2023-02-20)
more ...
comment
Keywords: Unique Proof Game, Castling Paradox (wk hidden wd fake)
Genre: Retro
Computer test: Stelvio 1.0
FEN: rn3knr/ppp2ppp/Q2pp3/8/2b5/P2BPP2/1PPPN1PP/q1KR2bR
Input: Gerd Wilts, 2000-07-31
Last update: Silvio Baier, 2023-03-02 more...
88 - P1000170
Andrej N. Kornilow
7 Die Schwalbe 169, p. 342, 02/1998
2. Lob
P1000170
(16+16) C+
KBP?
1. h4 a5 2. h5 a4 3. h6 a3 4. Th5 Ta4 5. Ta5 Th4 6. b4 g5 7. Lb2 Lg7 8. Ld4 Le5 9. Sc3 Sf6 10. Db1 0-0 11. Db3 Kh8 12. 0-0-0 Tg8 13. Kb1 Tg6 14. Ka1 Dg8 15. Tb1 Se8 16. Sd1 Td6 17. Dd3 Dg6 18. Tb3 De6 19. Dg6 Lf6 20. Te3 Db3 21. Lc3 Tdd4 22. Tee5 Sd6 23. Se3
play all play one stop play next play all
Moldenhauer: Computerprüfung: C+ Stelvio 1.31 89 Sekunden.
Keine Lösung: BP 22.0. (2023-06-20)
more ...
comment
Keywords: Unique Proof Game, Symmetrical position, Capture-free
Genre: Retro
Computer test: Natch 3.1 (13 min.)
FEN: 1nb4k/1ppppp1p/3n1bQP/R3R1p1/1P1r3r/pqB1N3/P1PPPPP1/K4BN1
Input: Gerd Wilts, 2000-08-01
Last update: Alfred Pfeiffer, 2018-12-19 more...
89 - P1000171
Andrej N. Kornilow
8 Die Schwalbe 169, p. 342, 02/1998
3. ehrende Erwähnung
P1000171
(14+14) cooked
KBP?
1. Sf3 Sc6 2. Se5 Sd4 3. Sxd7 Sxe2 4. Sb6 Sg3 5. Lc4 Lf5 6. De2 Dd7 7. Kd1 Td8 8. Te1 Dc8 9. Df1 Td3 10. Te6 Ta3 11. Th6 gxh6 12. bxa3 h5 13. a4 Lh6 14. La3 Le3 15. Ld6 Sh6 16. Sa3 Tg8 17. Tb1 Tg6 18. Tb3 Te6 19. Td3 f6 20. c3 Kf7 21. Kc2 Kg6 22. Kb3 Kg5 23. Kb4 Lg6 24. Lb3 Shf5 25. Sac4 h6 26. a3
play all play one stop play next play all
Cook: NL
1. Sf3 Sf6 2. e4 Sxe4 3. Lc4 h5 4. Ke2 Sg3 5. Kd3 Th6 6. Lb3 Ta6 7. Te1 Sc6 8. Te6 Ta3 9. Th6 gxh6 10. Se5 Lg7 11. Sxd7 Ld4 12. Sb6 Lf5 13. Kc4 Dd7 14. bxa3 Td8 15. a4 Dc8 16. La3 Td6 17. Df1 Te6 18. Ld6 f6 19. Sa3 Kf7 20. Te1 Kg6 21. Te3 Kg5 22. Td3 Le3 23. c3 Sd4 24. Kb4 Lg6 25. Sc4 Sf5 26. a3 (Henrik Juel)
Moldenhauer: Computerprüfung: Cooked Stelvio 1.31 108 Sekunden.
Keine Lösung: BP 25.0. KBP = 25.5! (2023-06-20)
more ...
comment
Keywords: Unique Proof Game, Symmetrical position
Genre: Retro
FEN: 2q5/ppp1p3/1N1Brpbp/5nkp/PKN5/PBPRb1n1/3P1PPP/5Q2
Input: Gerd Wilts, 2000-08-01
Last update: Alfred Pfeiffer, 2018-12-19 more...
90 - P1000172
Andrey Frolkin
Andrej N. Kornilow

9 Die Schwalbe 169, p. 342, 02/1998
3. Preis
P1000172
(14+14) cooked
KBP?
1. a4 h5 2. a5 h4 3. a6 h3 4. axb7 hxg2 5. h4 a5 6. h5 a4 7. h6 a3 8. h7 a2 9. Th6 Ta3 10. Sh3 Sa6 11. b8=D g1=D 12. Db4 Dg5 13. Dh4 Da5 14. b4 g5 15. 15. b5 g4 16. b6 g3 17. b7 g2 18. b8=D g1=D 19. Dbb4 Dgg5 20. Dbg4 Dgb5 21. c4 f5 22. Tf6 Tc3 23. dxc3 exf6 24. Le3 Ld6 25. Sd2 Se7 26. Tb1 Tg8 27. h8=S a1=S 28. Sg6 Sb3 29. Sgf4 Sbc5 30. Sg2 Sb7 31. f4 c5 32. Lg1 Lb8 33. e3 d6 34. Le2 Ld7 35. Sf1 Sc8 36. Dd2 De7 37. Kd1
play all play one stop play next play all
Cook: NL
1. d3 a5 2. Le3 a4 3. Sd2 a3 4. g4 Ta4 5. g5 Tc4 6. dxc4 b5 7. g6 b4 8. gxh7 b3 9. h4 bxa2 10. b4 e6 11. b5 g5 12. b6 g4 13. b7 g3 14. h5 g2 15. h6 Sa6 16. Th5 f6 17. Tb1 a1=S 18. Sh3 g1=D 19. b8=D Dg5 20. c3 Db5 21. Tf5 c5 22. Df4 Ld6 23. Dg4 Lb8 24. f4 Se7 25. Lg1 a2 26. e3 Sb3 27. Le2 a1=D 28. Sf1 Sa5 29. Dd2 Sb7 30. Kd1 Tg8 31. h8=S Da5 32. Sg6 exf5 33. Sh4 d6 34. Sg2 Ld7 35. h7 Sc8 36. h8=D De7 37. Dh8-h4 (Henrik Juel)
Moldenhauer: Computerprüfung: Cooked Stelvio 1.31 00:06:21 Minuten. (hh:mm:ss)
Keine Lösung: BP 36.0.
Beispiel Stelvio: 1.c3 a5 2.d3 a4 3.Le3 a3 4.Sd2 Ta4 5.Tb1 Tc4 6.dxc4 Sa6 7.g4 b5
8.g5 b4 9.g6 b3 10.gxh7 bxa2 11.b4 a1=S 12.b5 a2 13.b6 Sb3 14.h4 g5 15.h5 g4
16.h6 g3 17.Th5 g2 18.Sh3 g1=D 19.b7 Dg5 20.b8=D Db5 21.Tf5 c5 22.Df4 a1=D 23.Dg4 Sa5
24.f4 Sb7 25.Lg1 Daa5 26.e3 e6 27.Le2 Ld6 28.Sf1 Lb8 29.Dd2 Se7 30.Kd1 Tg8
31.h8=S d6 32.Sg6 Ld7 33.Sh4 Sc8 34.Sg2 De7 35.h7 f6 36.h8=D exf5 37.Dhh4 (2023-06-20)
more ...
comment
Keywords: Unique Proof Game, Symmetrical position, Non-standard material, Symmetrical solution
Genre: Retro
FEN: 1bn1k1r1/1n1bq3/n2p1p2/qqp2p2/2P2PQQ/2P1P2N/3QB1N1/1R1K1NB1
Reprints: feenschach 141 06/2001
Input: Gerd Wilts, 2000-08-01
Last update: Alfred Pfeiffer, 2018-12-19 more...
91 - P1000177
Gianni Donati
9989 Die Schwalbe 170 04/1998
Für den Geburtstag meiner Frau Dana
1. Lob
P1000177
(14+15) C+
BP in 12,0
1. Sc3 b5 2. Sd5 La6 3. Sxe7 Sxe7 4. e4 Sg6 5. e5 Ld6 6. e6 Kf8 7. e7 Kg8 8. e8=S Lg3 9. Sd6 Dh4 10. Sf5 Da4 11. Sd4 b4 12. Se2 Lxe2
play all play one stop play next play all
A.Buchanan: Solved in YouTube: https://www.youtube.com/watch?v=jtEu5g7rUVs (2022-02-17)
comment
Keywords: Unique Proof Game, Promotion (S), Pure Round Trip (B9), Homebase (w), Phoenix (S), Ceriani-Frolkin Theme (S), Prentos Theme (S), Tempo Loss
Genre: Retro
Computer test: (Natch 1.3 Copyright (C) 1997-1999 Pascal Wassong)
FEN: rn4kr/p1pp1ppp/6n1/8/qp6/6b1/PPPPbPPP/R1BQKBNR
Reprints: www.mathpuzzle.com
YouTube 17/02/2022
Input: Gerd Wilts, 2000-08-01
Last update: A.Buchanan, 2022-02-18 more...
92 - P1000202
Mikhailo Kozulya
10287 Die Schwalbe 175 02/1999
P1000202
(13+13) C+
BP in 23,0
1. a4 d5 2. a5 Dd7 3. a6 Dh3 4. axb7 Lf5 5. Ta6 Sd7 6. Tf6 exf6 7. g4 Ld6 8. Lg2 Lg3 9. fxg3 a5 10. Kf2 a4 11. Ke3 a3 12. Kd4 a2 13. Kc3 a1=T 14. Kb3 T1a4 15. Sa3 Se7 16. Ka2 Sc6 17. Kb1 Ke7 18. Sc4 Tag8 19. Se5 Sf8 20. Sg6+ hxg6 21. b8=S Th4 22. gxh4 Db3 23. Sf3 Lxc2+
play all play one stop play next play all
Henrik Juel: Natch 3.1 made no progress in half an hour (2018-12-13)
Moldenhauer: Computerprüfung: C+ Stelvio 1.11 00:15:12 Minuten. (hh:mm:ss)
Keine Lösung: BP 22.0, BP 22.5. (2023-03-27)
comment
Keywords: Unique Proof Game, Promotion (tS)
Genre: Retro
Computer test: Stelvio 1.11
FEN: 1N3nr1/2p1kpp1/2n2pp1/3p4/r5PP/1q3N2/1PbPP1BP/1KBQ3R
Input: Gerd Wilts, 2000-08-01
Last update: Silvio Baier, 2023-04-05 more...
93 - P1000219
Mark Kirtley
10414v Die Schwalbe 177 06/1999
Michel Caillaud gewidmet
P1000219
(16+10)
BP in 21,0
1. e4 a5 2. Dh5 Ta6 3. Dxa5 Th6 4. Da8 Sa6 5. Dxc8 Th5 6. Da8 h6 7. Dxa6 Da8 8. Dg6 Kd8 9. Dh7 Kc8 10. Dxg8 Kb8 11. Dxf8+ Ka7 12. Dxa8+ Kb6 13. Da5+ Kc6 14. La6 Kd6 15. d3 Ke6 16. Ld2 Kf6 17. Lb4 Kg6 18. Kd2 Kh7 19. Kc3 Kg8 20. Sd2 Kf8 21. Te1 Ke8
play all play one stop play next play all
14zügiger Rundlauf des sK
Korrektur in "Die Schwalbe" 181, 02/2000, S.377
Henrik Juel: Natch 3.1 did nothing in more than 3 hours (2018-12-13)
Vladimir Rey: I guess, FEN-misprint. Correct e3 = e4, probably. If p. e3: dual 8. Da6-d3 (2022-11-06)
Moldenhauer: Computerprüfung: Cooked Stelvio 1.5 wenn Bauer auf e3 steht.
Lösezeit: 70:23:07 Stunden. (hh:mm:ss) Keine Lösung: BP 20.5 ca. 22 Std.
Herr Vladimir Rey hat dies schon festgestellt.
8.Da6-d3 Ke8-d8 9.Dd3-h7 Kd8-c8
8.Da6-g6 Ke8-d8 9.Dg6-h7 Kd8-c8
Computerprüfung: C+ Stelvio 1.5 wenn Bauer auf e4 steht.
Lösezeit: 87:04:40 Stunden. Keine Lösung: BP 20.5 ca. 31Std.
Notation ist bereits für Bauer auf e4 richtig.
Richtige FEN: 4k2r/1pppppp1/B6p/Q6r/1B2P3/2KP4/PPPN1PPP/4R1NR
Die Strategien für e3 2944615/ e4 3379466 gerechnet mit 20/21 Playern. (2023-08-28)
comment
Keywords: Unique Proof Game, Pure Round Trip (k)
Genre: Retro
FEN: 4k2r/1pppppp1/B6p/Q6r/1B6/2KPP3/PPPN1PPP/4R1NR
Reprints: 10414 Die Schwalbe 181 02/2000
Input: Gerd Wilts, 2000-08-01
Last update: Alfred Pfeiffer, 2018-12-14 more...
94 - P1000230
Satoshi Hashimoto
10488 Die Schwalbe 178 08/1999
P1000230
(7+16) C+
BP in 24,0
1. d4 Sa6 2. d5 Tb8 3. d6 cxd6 4. c4 Sc7 5. c5 Sa8 6. c6 dxc6 7. a4 Kd7 8. a5 Kc7 9. a6 bxa6 10. g4 Kb7 11. g5 Dc7 12. g6 hxg6 13. b4 Th4 14. b5 Tb4 15. b6 axb6 16. h4 Ka7 17. h5 Lb7 18. h6 gxh6 19. f4 Lg7 20. f5 Lxa1 21. f6 exf6 22. e4 Se7 23. e5 Sc8 24. e6 fxe6
play all play one stop play next play all
Henrik Juel: Natch 3.1 did nothing in an hour
and neither did Euclide 1.01 (2018-12-13)
Moldenhauer: Computerprüfung: C+ Stelvio 1.0 02:33:48 Stunden.
Keine Lösung: BP 23.0, BP 23.5. (2023-02-18)
comment
Keywords: Unique Proof Game, Homebase (w)
Genre: Retro
Computer test: Stelvio 1.0
FEN: nrn5/kbq5/pppppppp/8/1r6/8/8/bNBQKBNR
Reprints: 18 64 Proof Games 2012
Input: Gerd Wilts, 2000-08-01
Last update: Silvio Baier, 2023-03-02 more...
95 - P1000246
Andrej N. Kornilow
Alexander Kislyak

10666 Die Schwalbe 181 02/2000
P1000246
(15+15) C+
BP in 30,5
1. h4 a5 2. h5 a4 3. h6 a3 4. hxg7 axb2 5. Th6 Ta3 6. Tc6 Tf3 7. a4 h5 8. a5 h4 9. a6 h3 10. a7 h2 11. a8=D h1=D 12. Da5 Dh4 13. De5 Dd4 14. Ta5 Th4 15. Sa3 Sh6 16. g8=D b1=D 17. Dgg3 Dbb6 18. Dh2 Da7 19. g4 b5 20. g5 b4 21. g6 b3 22. g7 b2 23. g8=D b1=D 24. Dgg2 Dbb7 25. Lb2 Lg7 26. Da1 Kf8 27. Kd1 Kg8 28. Kc1 Kh7 29. Kb1 Dh8 30. Ka2 Lf8 31. Lc1
play all play one stop play next play all
Reto: This is a case where strategy analysis in Stelvio is in a certain sense optimal: Only 1 strategy remains after analysis, namely the one that belongs to the solution. (2023-04-25)
more ...
comment
Keywords: Unique Proof Game, Symmetrical position, Non-standard material (DDdd), Phoenix, Prenix, Ceriani-Frolkin Theme, Asymmetrical solution, Promotion (DDDddd)
Genre: Retro
Computer test: Computerprüfung: C+ Stelvio 1.11 1 Sekunde. Keine Lösung: BP 29.5, BP 30.0.
FEN: 1nb2b1q/qqpppp1k/2R4n/R3Q3/3q3r/N4r2/K1PPPPQQ/Q1B2BN1
Input: Gerd Wilts, 2000-08-01
Last update: A.Buchanan, 2023-04-26 more...
96 - P1000370
Paul Raican
7672v feenschach 131 01-05/1999
Lavinia gewidmet
P1000370
(16+16) cooked
BP in 12,5
Platzwechselcirce
1. Sf3 Sc6 2. Sd4 Sxd4[+wSc6] 3. Sxd8[+sDc6] Dxc2[+wBc6] 4. f3 Dxc1[+wLc2] 5. Lxh7[+sBc2] cxd1=S[+wDc2] 6. Le4 Se3+ 7. Kf2 Dxf1[+wLc1]+ 8. Kxe3[+sSf2] Sxe4[+wLf2] 9. Kxd4[+sSe3] Dxf2[+wLf1] 10. dxe3[+sSd2] Dxe3[+wBf2]+ 11. Kd5 Dh6 12. Sxd2[+sSb1] Dxc6[+wBh6] 13. Sxc6[+sDd8]
play all play one stop play next play all
paul: démoli : 6.d3 Dh6 7.Fé4 D×ç6(h6) 8.C×ç6(Dd8) Cf2 9.Rd2 C×d3(f2) 10.R×d3(Cd2) C×é4(Fd2) 11.R×d4(Cd3) Cç1 12.F×ç1(Cd2) C×b1(Cd2) 13.Rd5 (2021-09-20)
more ...
comment
Keywords: Circe (Platzwechsel-), Unique Proof Game
Genre: Retro, Fairies
FEN: r1bqkbnr/ppppppp1/2N4P/3K4/4n3/5P2/PPQNPPPP/RnB2B1R
Reprints: feenschach 248 08-10/2001
feenschach 144, p. 310, 11-12/2001
Input: Gerd Wilts, 2000-08-01
Last update: A.Buchanan, 2021-09-21 more...
97 - P1000376
Manfred Rittirsch
7678 feenschach 131 01-05/1999
P1000376
(11+14)
BP in 15,0
Isardam
1. d4 a5 2. Lh6 gxh6 3. h4 Lg7 4. Th3 Lxd4 5. Te3 Sf6 6. Te6 dxe6 7. e3 Sbd7 8. La6 bxa6 9. c4 Lb7 10. c5 Lxg2 11. c6 Dc8 12. cxd7+ Lc6 13. dxc8=L e5 14. Lh3 Sg8 15. Lf1 0-0-0
play all play one stop play next play all
Weiß kann im 13. Zug nicht dxe8 spielen, da das Feld e8 von Figuren aller vier Arten beobachtet ist.
paul: The last eight moves checked by Popeye 4.55:
a=b8 13 + 16
Isardam

1.Bf1-a6 b7*a6 2.c2-c4 Bc8-b7 3.c4-c5 Bb7*g2 4.c5-c6 Qd8-c8 5.c6*d7 + Bg2-c6 6.d7*c8=B e6-e5 7.Bc8-h3 Sf6-g8 8.Bh3-f1 0-0-0 a=b

solution finished. Time = 1:44:59 h:m:s (2010-12-26)
paul: And the first 12.5 verified by Jacobi. (2022-01-01)
comment
Keywords: Unique Proof Game, Isardam, Pronkin Theme (L), Switchback (s)
Genre: Retro, Fairies
FEN: 2kr2nr/2p1pp1p/p1b4p/p3p3/3b3P/4P3/PP3P2/RN1QKBN1
Reprints: H39 FIDE Album Annexe 1998-2000 2009
Input: Gerd Wilts, 2000-08-01
Last update: A.Buchanan, 2014-05-20 more...
98 - P1000406
Gianni Donati
8076 feenschach 135 01-05/2000
2. Preis
P1000406
(14+15) C+
BP in 18,5
1. c3 d6 2. Da4+ Ld7 3. b3 Sf6 4. La3 Se4 5. Lc5 Sxd2 6. e4 Sxb1 7. Lb5 Sa3 8. 0-0-0 Sc2 9. Td5 Sa1 10. Te5 d5 11. Kb2 d4 12. Ka3 d3 13. Dd4 d2 14. Kb4 d1=L 15. a3 L1g4 16. Sf3 Lc6 17. Td1 Lc8 18. Td3 L6d7 19. Lxd7+
play all play one stop play next play all
Henrik Juel: This fine proof game by Gianni is faster to solve by hand than by computer
Last move was not 19.Lb5xPd7+, because Sa1 did an uneven number of moves; 18.Lb5xPd7+ fails, because White needs 19 moves, since Td1-d5 must happen early. So [Pd7] has promoted, and Black must play 1... d6 and 2... Dd7 or Ld7; only the latter works
Partially tested by Natch 3.1 in 18.0 moves with wLb5 and sDTLSPd7; only L works (2018-12-14)
more ...
comment
Keywords: Unique Proof Game, Pronkin Theme (l)
Genre: Retro
Computer test: Computerprüfung: C+ Euclide 1.11 nach 237 Std. 28 Min. Keine Lösung bei BP 17,5 , geprüft in 1 Min. Computerprüfung: C+ auch Stevio 1.11 00:27:56 Minuten. (hh:mm:ss) Keine Lösung: BP 18.0. 4994/419k Histogramm.
FEN: rnbqkb1r/pppBpppp/8/2B1R3/1K1QP3/PPPR1N2/5PPP/n7
Reprints: Quartz 25 07-09/2004
Input: Gerd Wilts, 2000-08-01
Last update: A.Buchanan, 2023-05-14 more...
99 - P1000447
Michel Caillaud
R5v Problemesis 10 08/1999
3. Preis
P1000447
(15+14) C+
BP in 17,0
1. a4 a5 2. Ta3 Ta6 3. Tb3 Tc6 4. Tb6 g6 5. Ta6 Lh6 6. Ta8 Sa6 7. Txc8 Sb4 8. Ta8 Db8 9. Ta6 Kd8 10. Tb6 cxb6 11. f3 Tc8 12. Kf2 Sc6 13. b4 Dc7 14. bxa5 Ta8 15. a6 Kc8 16. a5 Dd8 17. Kg3 Sb8
play all play one stop play next play all
Richter H. Gruber "What a correction! Making the previously cooked R5 sound (hopefully), the author simultaneously improved it substantially : Instead of 'only' two, now we have three capture-free black circuits (Dd8, Ta8, Sb8). Everything is based on the need to capture sLc8, and it is achieved virtuously. It is not apparent that sTa8 and sSb8 have to move at all. This makes R5v clearly superior to a number of related tourney entries showing multiple switchbacks (cf. 3rd and 4th Hon. Men.). "
paul: Correction of P1000446 (2022-02-06)
Henrik Juel: There is a funny english error in the judge comment
He probably wanted to say that the author performed like a virtuoso, but wrote 'and it is achieved virtuously.', which has a completely different meaning (2022-02-06)
A.Buchanan: This is very impressive. (2022-02-07)
comment
Keywords: Unique Proof Game, Pure Round Trip (dst)
Genre: Retro
Computer test: Stelvio 1.2, 2:30min
FEN: rnkq2nr/1p1ppp1p/Pp4pb/P7/8/5PK1/2PPP1PP/1NBQ1BNR
Reprints: feenschach 141 06/2001
Input: Gerd Wilts, 2000-08-01
Last update: Reto, 2023-05-11 more...
100 - P1000474
Andrey Frolkin
Mikhailo Kozulya

P0055 StrateGems 10 04-06/2000
Thomas Volet gewidmet
2. Preis
P1000474
(15+6) C+
BP in 17,5
1. e3 h5 2. Dg4 hxg4 3. Se2 Th3 4. Tg1 Tf3 5. gxf3 e5 6. Lg2 e4 7. fxe4 d5 8. exd5 Sc6 9. dxc6 Lb4 10. cxb7 Lc3 11. bxc3 Dd4 12. cxd4 Lf5 13. Sbc3 Kd7 14. Tb1 Te8 15. Tb2 Te5 16. dxe5 Sf6 17. exf6 Lh7 18. fxg7
play all play one stop play next play all
Weiße Bauern b2 und g2 schlagen diagonal über Kreuz nach g7 und b7.
more ...
comment
Keywords: Unique Proof Game, Volet Pawn (2)
Genre: Retro
Computer test: C+ Euclide 1.11 in 16 Std. 23 Min. Keine Lösung in BP 16,5, Zeit 50 Min. C+ Stelvio 1.4 in 17 seconds.
FEN: 8/pPpk1pPb/8/8/6p1/2N1P3/PRPPNPBP/2B1K1R1
Reprints: feenschach 153 10-12/2003
Input: Gerd Wilts, 2000-08-01
Last update: A.Buchanan, 2023-08-30 more...
Show statistic for complete result. Show search result faster by using ids.

https://pdb.dieschwalbe.de/search.jsp?expression=COMMENTDATE%3E%3D20200919+AND+NOT+K%3D%27Hilfsr%C3%BCckz%C3%BCger%27+AND+NOT+S%3D%27Los+Angeles+Times%27+AND+K%3D%27Eindeutige+Beweispartie%27

The problems of this query have been registered by the following contributors:

Gerd Wilts (100)