Chess Problem Database Server

1 - P0005906
Unto Heinonen
R202v The Problemist 05/1992
2. Preis

(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

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...

2 - P0005911
Unto Heinonen
2375 U.S. Problem Bulletin 01-02/1992

(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

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Keywords: Unique Proof Game, Non-standard material, Pendulum (T x30), Superseded by (P0008426)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...

3 - P0008568
Unto Heinonen
Springaren 1996
2. Preis

(13+12) C+
BP in 19,0

1. b4 c5 2. b5 Dc7 3. b6 Dg3 4. hxg3 h6 5. Txh6 axb6 6. Tc6 Txa2 7. Sa3 Txc2 8. Lb2 Tc4 9. Sc2 Tch4 10. e4 g6 11. Lc4 Lh6 12. Se2 Le3 13. dxe3 e6 14. Dd3 Se7 15. 0-0-0 0-0 16. Txc8 Sc6 17. Ta8 Th8 18. Ta1 Ta8 19. Th1 Sb8
play all

more ...
comment

Keywords: Unique Proof Game, Interchange (TTtt), Castling, Switchback (s)
Genre: Retro
Computer test: Resolution time : 1 h 24 mn 24.56 s., Natch 2.3 Copyright (C) 1997,98,99,2001,2002,2003,2004 Pascal Wassong
paul: Stelvio 2.0 found the solution in 2 minutes.
FEN: rn4kr/1p1pnp2/1p2p1p1/2p5/2B1P3/3QP1P1/1BN1NPP1/R1K4R
Reprints: Tim Krabbé's Website (57) 2000
feenschach 153 10-12/2003
H24 FIDE Album 1995-1997 2004
(79) Die Schwalbe 250A 08/2011
Input: Gerd Wilts, 1997-01-09
Last update: A.Buchanan, 2024-04-05 more...

4 - P0008940
Unto Heinonen
R019 Probleemblad 03/1998

(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

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...

5 - P1000661
Unto Heinonen
R073 Probleemblad 11/1999

(15+13) cooked
KBP 29,0

1. a4 Sa6 2. a5 Sc5 3. a6 Sh6 4. axb7 Sf5 5. b8=S La6 6. Sc6 Lc4 7. Ta6 Tc8 8. Tb6 a5 9. g4 a4 10. Sa5 c6 11. g5 Dc7 12. g6 Kd8 13. gxf7 g5 14. Sc3 Lg7 15. Sd5 Lc3 16. Sf3 Lb4 17. c3 g4 18. d4 g3 19. Lh6 g2 20. Db1 Dg3 21. Se5 Dg8 22. fxg8=S g1=S 23. Sgf6 Sh3 24. Sh5 Sg5 25. Lh3 a3 26. 0-0 a2 27. Td1 axb1=S 28. Td3 Sa3 29. Te3 Sb5
play all

Cook: 1. a4 Sa6 2. a5 Sc5 3. a6 Sh6 4. axb7 Sf5 5. b8=S La6 6. Sc6 Lc4 7. Ta6 Db8 8. Tb6 a5 9. g4 a4 10. Sa5 c6 11. g5 Kd8 12. g6 a3 13. gxf7 g5 14. Sc3 Lg7 15. Sd5 Lc3 16. Sf3 Lb4 17. c3 g4 18. d4 g3 19. Lh6 g2 20. Db1 Dg3 21. Se5 Dg8 22. fxg8=S g1=S 23. Sgf6 Sh3 24. Sh5 Sg5 25. Lh3 a2 26. 0-0 axb1=S 27. Td1 Sa3 28. Td3 Sb5 29. Te3 Tc8

Moldenhauer: Computerprüfung: C- oder Cooked Stelvio 1.4 in 48 Sekunden.
Keine Lösung: BP 28.5.
1.a4 Sa6 2.a5 Sc5 3.a6 Sh6 4.axb7 Sf5 5.b8=S La6 6.Sc6 Lc4 7.Ta6 Db8 8.Tb6 a5
9.g4 a4 10.Sa5 Kd8 11.g5 a3 12.g6 c6 13.gxf7 g5 14.Sc3 Lg7 15.Sd5 Lc3
16.Sf3 Lb4 17.c3 g4 18.d4 g3 19.Lh6 g2 20.Db1 Dg3 21.Se5 Dg8 22.fxg8=S g1=S
23.Sgf6 Sh3 24.Sh5 Sg5 25.Lh3 a2 26.0–0 Tc8 27.Td1 axb1=S 28.Td3 Sa3 29.Te3 Sb5 (2023-08-01)
comment

Keywords: Unique Proof Game
Genre: Retro
FEN: 2rk3r/3pp2p/1Rp4B/NnnNNnnN/1bbP4/2P1R2B/1P2PP1P/6K1
Input: Gerd Wilts, 2000-08-01
Last update: Rainer Staudte, 2023-08-02 more...

6 - P1000709
Unto Heinonen
R022 Probleemblad 05/1998
1. Preis

(14+16) C+
BP in 23,0

1. Sf3 h5 2. Se5 Th6 3. Sg4 e5 4. a3 Lxa3 5. e4 Le7 6. Ta6 c5 7. Tc6 a5 8. Lb5 Ta6 9. La4 b5 10. Df3 Lb7 11. Tc8 Lxe4 12. Kd1 Lc6 13. Te1 d5 14. Te4 Sd7 15. Tf4 Sb6 16. Tf6 Kd7 17. Te6 f5 18. Da3 Lf6 19. Te8 Se7 20. d3 Ke6 21. Lg5 Dd6 22. Lh4 g5 23. Ted8 Sg6
play all

more ...
comment

Keywords: Unique Proof Game, Ornament
Genre: Retro
Computer test: Natch 3.1 Stelvio 2.0 solves this PG in 3 minutes.
FEN: 2RR4/8/rnbqkbnr/pppppppp/B5NB/Q2P4/1PP2PPP/1N1K4
Reprints: feenschach 153 10-12/2003
Input: Gerd Wilts, 2000-08-13
Last update: A.Buchanan, 2024-04-05 more...

7 - P1000920
Unto Heinonen
R063c Probleemblad 09-10/2000
2. Preis

(12+8)
BP in 18,5

1. a4 b5 2. axb5 Sa6 3. Txa6 d5 4. Tg6 hxg6 5. b4 Th3 6. La3 Tg3 7. hxg3 Sh6 8. Txh6 Lh3 9. gxh3 gxh6 10. Lg2 Lg7 11. Le4 Lc3 12. dxc3 a5 13. Kd2 dxe4 14. Kc1 e3 15. De1 Dd1+ 16. Kb2 0-0-0 17. bxa5 Td3 18. Ld6 exd6 19. cxd3
play all

5 Überkreuzschläge von Bauern.

Henrik Juel: Natch 3.1 did nothing in half an hour (2018-12-14)
paul: Correction of P1000629 (2022-10-12)
comment

Keywords: Unique Proof Game, Castling (sg), Cross-capture (5)
Genre: Retro
FEN: 2k5/2p2p2/3p2pp/PP6/8/2PPp1PP/1K2PP2/1N1qQ1N1
Reprints: feenschach 153, p. 195, 10-12/2003
H28 FIDE Album Annexe 1998-2000 2009
Input: Gerd Wilts, 2000-10-12
Last update: Alfred Pfeiffer, 2018-12-20 more...

8 - P1001275
Unto Heinonen
The Problemist 1991-1992
2. Preis

(13+15) C+
BP in genau 25,5

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
play all

17-zügige Wanderung des wK bis nach h3 zum Tempoverlust.

paul: Un dernier coup noir s'impose. Voir P0005906. (2010-05-08)
Moldenhauer: Computerprüfung: C+ Stelvio 1.0 1 Sekunde.
Keine Lösung: BP 24.5, BP 25.0. (2023-02-17)
Reto: There are in fact solutions in exactly 25.0 moves and Stelvio finds those. So the above comment is incorrect. (2023-06-12)
Moldenhauer: Danke für die Korrektur. In meiner Worddatei im Bildschirmausschnitt steht cooked,
also habe ich die Eingabe hier falsch gemacht. Sorry! (2023-11-05)
comment

Keywords: Unique Proof Game, Promenade (K), Tempo Loss (K17)
Genre: Retro
Computer test: Stelvio 1.0
FEN: 2r3n1/3npp1N/3bb3/rppp2p1/1qb3k1/8/PP1PPPPP/R1B1KB1R
Reprints: feenschach 137 08-09/2000
H25 FIDE Album Annexe 1992-1994 2003
Input: Gerd Wilts, 2001-08-29
Last update: Silvio Baier, 2023-03-02 more...

9 - P1004439
Unto Heinonen
A9 Problemkiste 137 10/2001

(6+3)
-1w, dann ser-h=9

R: 1. a7-a8=D, dann 1. a1=L 2. Le5 3. Lb8 4. Kc7 5. f2 6. f1=S 7. Sd2 8. Sc4 9. Sxb6 axb8=T=
play all

Henrik Juel: C+ Popeye 4.61 (without the retraction, which is unique) (2022-11-08)
comment

Keywords: Help retractor, Seriesmover, Allumwandlung
Genre: Retro, Fairies
FEN: Q2R4/1k6/1N6/B4K2/8/5p2/p7/7B
Input: Gerd Wilts, 2003-01-11
Last update: A.Buchanan, 2024-01-12 more...

10 - P1017682
Unto Heinonen
Springaren 1997
3. Preis

(14+16) cooked
BP in 26,0

1. b4 Sh6 2. Lb2 Tg8 3. Lf6 gxf6 4. Sc3 Tg3 5. Tb1 Th3 6. g4 Sa6 7. Lg2 Tb8 8. Lc6 bxc6 9. g5 Tb5 10. g6 Tbh5 11. b5 Sg4 12. b6 Lh6 13. Tb5 Sb4 14. Tg5 La6 15. b7 Lb5 16. b8=L a6 17. La7 Da8 18. Le3 c5 19. g7 Dg2 20. g8=L Sc6 21. Tg7 Lg5 22. Sf3 h6 23. Lh7 Sb8 24. Le4 f5 25. Lb7 Sf6 26. Sd5 Sg8
play all

Cook: 1. Sb1-c3 b7-b6 2. Ta1-b1 Lc8-a6 3. b2-b4 La6-d3 4. b4-b5 Dd8-c8
5. Tb1-b4 Sb8-a6 6. Tb4-c4 Ta8-b8 7. Tc4-c5 b6xc5 8. Lc1-b2 Tb8-b6
9. g2-g4 Tb6-h6 10. b5-b6 Th6-h3 11. b6-b7 Sg8-h6 12. b7-b8=T Th8-g8
13. Tb8-b6 Sa6-b8 14. Lf1-g2 Dc8-a6 15. Tb6-f6 g7xf6 16. Lg2-b7 Tg8-g5
17. Sc3-d5 Tg5-h5 18. g4-g5 Ld3-b5 19. g5-g6 f6-f5 20. g6-g7 Da6-g6
21. Lb2-d4 Dg6-g2 22. g7-g8=T a7-a6 23. Tg8-g3 Sh6-g8 24. Ld4-e3 Lf8-h6
25. Tg3-g7 Lh6-g5 26. Sg1-f3 h7-h6

paul: First 22.5 moves tested with Euclide 1.11 (~11h) (2017-12-29)
Henrik Juel: Now things are OK, I think
Earlier the solution given was for a BP in 19, starting 1.b4 c5 (2017-12-29)
Olaf Jenkner: Yes, I overlooked the date of the first comment. I would not have asked. (2017-12-29)
more ...
comment

Keywords: Unique Proof Game, Pure Round Trip
Genre: Retro
Computer test: Reto: Cooked by Stelvio 1.11
FEN: 1n2k1n1/1BppppR1/p6p/1bpN1pbr/8/4BN1r/P1PPPPqP/3QK2R
Reprints: feenschach 153, p. 191, 10-12/2003
H16 FIDE Album Annexe 1995-1997 2004
Input: Gerd Wilts, 2004-08-06
Last update: Mario Richter, 2023-04-01 more...

11 - P1109633
Nicolas Dupont
Unto Heinonen
Juha M. Saukkola
Ronald Schäfer
Martin Walter
Göran Wicklund
(B) Die Schwalbe 233 10/2008

(12+12) C+
BP in 6,5
Schlagschach

1. h4 b6 2. h5 La6 3. h6 Lxe2 4. hxg7 Lxf1 5. gxh8=T Lxg2 6. Txh7 Lxh1 7. Txh1
play all

paul: No need of Schlagschach (same solution with orthodox rules) (2022-11-06)
comment

Keywords: Unique Proof Game, Pronkin Theme (T), Losing Chess, Homebase (w)
Genre: Retro, Fairies
Computer test: Popeye Windows-32Bit v4.51 (1024 KB)
FEN: rn1qkbn1/p1pppp2/1p6/8/8/8/PPPP1P2/RNBQK1NR
Input: Gerd Wilts, 2010-07-03
Last update: A.Buchanan, 2013-04-20 more...

12 - P1384473
Unto Heinonen
StrateGems 2019
3. Preis

(10+14) cooked
BP 23

paul: 1.d4 h6 2.Bg5 h×g5 3.Sf3 Rh3 4.Sh4 g×h4 5.d5 g5 6.d6 Bg7 7.d×ç7 d5 8.é4 Bf5 9.ç8=S Bg6 10.Sb6 a×b6 11.Bç4 Raa3 12.Bb3 Sa6 13.ç4 d×ç4 14.0-0 Qd2 15.é5 Kd7 16.é6+ Kd6 17.é×f7 é5 18.f8=Q+ Sé7 19.Qé8 Sç8 20.Qa4 b5 21.Ré1 b×a4 22.Ré3 b5 23.Rd3+ ç×d3
Cook : 9.é5 a6 10.Bb5+ a×b5 11.ç4 d×ç4 12.0-0 Qd2 13.Ré1 Kd7 14.é6+ Kd6 15.Ré3 Bg6 16.é×f7 Ra3 17.Rd3+ ç×d3 18.f8=Q Sa6 19.Qf4+ é5 20.Qfa4 b×a4 21.ç8=B Sé7 22.Bé6 b5 23.Bb3 Sç8 (2022-05-31)
Moldenhauer: Computerprüfung: Cooked Stelvio 1.6 in 16:26:20 Stunden. (hh:mm:ss)
Keine Lösung: BP 22.5.

Obige Lösung von paul ist Stevios einzige Lösung ohne cook.
Stelvio findet noch 4 cooks. Beispiel.

1.Sf3 a6 2.d4 d5 3.Lg5 Lf5 4.e4 h6 5.Lb5+ axb5 6.0–0 Ta3 7.Te1 Sa6 8.c4 dxc4 9.d5 hxg5 10.d6 Th3 11.Sh4 gxh4 12.dxc7 Dd2 13.e5 Kd7 14.Te4 g5 15.e6+ Kd6 16.c8=L Lg6 17.exf7 e5 18.Le6 Lg7 19.f8=D+ Se7 20.Dff3 Sc8 21.Dd3+ cxd3 22.Ta4 bxa4 23.Lb3 b5 (2023-12-15)
comment

Genre: Retro
FEN: 2n5/6b1/n2k2b1/1p2p1p1/p6p/rB1p3r/PP1q1PPP/RN1Q2K1
Input: fs/hg, 2020-12-30
Last update: A.Buchanan, 2022-06-01 more...

13 - P1384480
Unto Heinonen
Retros mailing list 1997
1. Preis
Retros Mailing List Quick Comp. Tourney

(14+15) C+
BP in 25,0

1. b2-b3 Sg8-h6 2. Lc1-b2 Sh6-f5 3. Lb2-f6 h7-h6 4. Lf6-g5 h6xg5 5. Sb1-a3 Th8-h3 6. Dd1-b1 Th3-g3 7. h2xg3 Sb8-c6 8. Th1-h6 Sc6-a5 9. Th6-c6 b7xc6 10. Ke1-d1 Lc8-a6 11. Kd1-c1 Dd8-b8 12. Kc1-b2 Ke8-d8 13. Kb2-c3 Kd8-c8 14. Db1-b2 Kc8-b7 15. Ta1-e1 Kb7-b6 16. Sa3-c4 Kb6-c5 17. Kc3-d3 Db8-b4 18. Kd3-e4 Sa5-b7 19. Ke4-f3 Kc5-d5 20. Sc4-e5 La6-c4 21. Kf3-g4 Kd5-e6 22. Kg4-h3 Ke6-f6 23. Se5-d3 Kf6-g6 24. Kh3-h2 Kg6-h7 25. Kh2-h1 Kh7-h8
play all

Duplicate Diagram: P1001277

LaTeX-import:
Source not uniquely identified: Internet-Retroliste
Michel Caillaud: The position, to be found at https://www.janko.at/Retros/RML/1997/N00-Awards.htm, is with wTe1 instead of wTd1
The source is 1. Preis, Retros-List Quick Comp. Tourney, Retros List 1997
The problem is C+ (Natch, Stelvio...) : solution as given by Henrik except 15.Ta1-e1
The position with wTd1 is indeed cooked (cook using 0-0-0) (2022-12-18)
more ...
comment

Keywords: Unique Proof Game
Genre: Retro
Computer test: Stelvio 1.0
FEN: r4b1k/pnppppp1/2p5/5np1/1qb5/1P1N2P1/PQPPPPP1/4RBNK
Reprints: Retros mailing list 1997
Input: fs/hg, 2020-12-30
Last update: A.Buchanan, 2024-01-31 more...

14 - P1384641
Unto Heinonen
Springaren 1994
1. Preis

(15+13)
BP 23

Moldenhauer: Computerprüfung: Cooked Stelvio 1.6 in 03:06:11 Stunden. (hh:mm:ss)
Keine Lösung: BP 22.5.

1.e4 h5 2.Le2 h4 3.Lh5 e5 4.Ke2 Ke7 5.Kf3 Kd6 6.Kg4 Kc5 7.d4+ Kc4 8.Ld2 La3
9.Lb4 Df6 10.c3 Df3+ 11.Kg5 f6+ 12.Kg6 Th6+ 13.Kf7 Tg6 14.Da4 Kd3 15.Dxd7 Kc2
16.Dd8 Le6+ 17.Ke8 Lxa2 18.Lf8 Lc4 19.b3 Lc1 20.Txa7 Kd1 21.Txb7 Ta1
22.Ta7 Ke1 23.Ta8 Dd1

1.c3 e5 2.Da4 Ke7 3.d4 Kd6 4.Kd2 Kd5 5.Ke3 De8 6.Dxd7+ Kc4 7.a4 Kb3 8.Ke4 Kc2
9.Kd5 Kd1 10.Dd8 Ke1 11.e4 Dxa4 12.Le2 Dd1 13.Txa7 Le7 14.Txb7 Ta1 15.Ta7 La6
16.Ta8 Lg5 17.b3 f6 18.Ke6 h5 19.Kf7 Th6 20.Ke8 Tg6 21.La3 Lc4 22.Lf8 h4
23.Lh5 Lc1 (2023-12-15)
comment

Genre: Retro
FEN: Rn1QKBn1/2p3p1/5pr1/4p2B/2bPP2p/1PP5/5PPP/rNbqk1NR
Input: fs/hg, 2020-12-30
Last update: fs/hg, 2020-12-30 more...

15 - P1384642
Unto Heinonen
Springaren 2005-2006
4. Preis
Julturnering

(15+14)
BP in 21.5

1. c3 g5 2. Db3 Lg7 3. De6 dxe6 4. h4 Dd3 5. h5 Dg6 6. hxg6 h5 7. a4 h4 8. a5 h3 9. a6 h2 10. axb7 a5 11. Sh3 a4 12. Tg1 h1=D 13. g3 Dd5 14. Sa3 Dd8 15. Sc4 Kd7 16. Sa5 Kd6 17. Ta3 Sd7 18. b8=D Ke5 19. Db3 Kf5 20. Dd1 Kg4 21. Tb3 a3 22. e4#
play all

paul: 1.c3 g5 2.Qb3 Bg7 3.Qe6 d×e6 4.h4 Qd3 5.h5 Qg6 6.h×g6 h5 7.a4 h4 8.a5 h3 9.a6 h2 10.a×b7 a5 11.Sh3 a4 12.Rg1 h1=Q 13.g3 Qd5 14.Sa3 Qd8 15.Sc4 Kd7 16.Sa5 Kd6 17.Ra3 Sd7 18.b8=Q Ke5 19.Qb3 Kf5 20.Qd1 Kg4 21.Rb3 a3 22.e4# (2022-08-09)
Henrik Juel: the animation requires german notation, 2. Db3 Lg7 etc. (2022-08-10)
Henrik Juel: C+ Euclide 1.01 (2022-08-10)
comment

Genre: Retro
FEN: r1bq2nr/2pnppb1/4p1P1/N5p1/4P1k1/pRP3PN/1P1P1P2/2BQKBR1
Input: fs/hg, 2020-12-30
Last update: Mario Richter, 2022-08-11 more...

16 - P1386520
Unto Heinonen
P0493v StrateGems 89, p. 36, 01/2020
2. ehrende Erwähnung

(16+16) cooked
BP in 42.5

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. Taa3 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. Tf6 Kb1 43. Sc3+
play all

Cook: 1. a4 a5 2. h4 h5 3. Ta3 Sh6 4. Tc3 Sf5 5. Sh3 Sd4 6. Sf4 Th6 7. Thh3 Tg6 8. Thf3 Tg3 9. Sg6 Sb3 10. Sh8 Th3 11. g3 g6 12. Lg2 Lg7 13. Kf1 Ld4 14. Tf6 d6 15. Ld5 Ta6 16. Kg2 Tb6 17. Kf3 Lf5 18. Kf4 Ld3 19. Kg5 Kd7 20. Kh6 Sa1 21. Kg7 Tb3 22. Lc4 Ta3 23. b3 Ta2 24. La3 Kc6 25. Lc5 Sd7 26. La7 Sb6 27. Dh1+ Kc5 28. La6+ Kb4 29. Tc5 Sc4 30. Sc3 Dd7 31. Kf8 Db5 32. Dc6 d5 33. Se4 Ka3 34. Ke8 Kb2 35. Kd8 Kb1 36. Kc8 Lc3 37. Kb8 Lb4 38. Ka8 Th1 39. Lb8 Sb6+ 40. Ka7 Sa8 41. c4 Tg1 42. Db6 De8 43. Sc3+

Korrektur zu P0002554
James Malcom: Correction of P0002554 (2021-02-15)
paul: 2nd Honorable Mention (SG98, 2022) (2022-08-20)
A.Buchanan: Cooked by Boris Tummes (2022-12-27)
Teppo Mänttä: A substitute version: white Db6 to g7, Tf6 to b6, Sc3 to e4; black Kb1 to b2; BP in 41.5 moves. Unto Heinonen, Tehtäväniekka No. 5, December 2022. (2022-12-29)
more ...
comment

Keywords: Unique Proof Game, Capture-free, Move Length Record
Genre: Retro
FEN: nB2q2N/Kpp1pp2/BQ3Rp1/p1Rp3p/PbP4P/1PNb2P1/r2PPP2/nk4r1
Input: James Malcom, 2021-02-15
Last update: A.Buchanan, 2022-12-27 more...

17 - P1407171
Unto Heinonen
H10 Tehtäväniekka , p. 189, 12/2022

(16+16)
PG in 41.5

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. Taa3 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. Dg7 Sa1 41. Tf6 Kb2 42. Tb6+
play all

Henrik Juel: Thanks to Michel for providing the solution and to James for animating it (2023-04-20)
more ...
comment

Keywords: Unique Proof Game, Move Length Record, Capture-free
Genre: Retro
FEN: nB2q2N/Kpp1ppQ1/BR4p1/p1Rp3p/PbP1N2P/1P1b2P1/rk1PPP2/n5r1
Input: A.Buchanan, 2023-01-08
Last update: James Malcom, 2023-04-20 more...

18 - P1412978
Unto Heinonen
Probleemblad 2006

(7+11)
BP in 16.5

1. g4 Sf6 2. g5 Se4 3. g6 hxg6 4. Sf3 Txh2 5. Se5 Th8 6. Sxd7 e5 7. a3 Lxa3 8. Lh3 Lb4 9. 0-0 Lxd2 10. Sxb8 Lf4 11. Dxd8+ Kxd8 12. Lxc8 Kxc8 13. Le3 Kxb8 14. Lb6 axb6 15. Txa8+ Kxa8 16. Sc3 Tb8 17. Ta1#
play all

Moldenhauer: Im Anfangsdiagramm und in den FEN gibt es keinen schwarzen Bauern auf e5.
Fügt man die Lösung in Fritz ein ist der Bauer auf e5 vorhanden.
Ohne Bauern auf e5 hat Stevio 1.6 nach 141 Std. 25 cooks gefunden.
Diagrammfehler? Reto welche FEN hast Du für die C+ Lösung? (2023-10-23)
Reto: Mein Fehler, sBe5 ergänzt. Danke für den Input. (2023-10-24)
comment

Genre: Retro
Computer test: Stelvio 1.79 in around 6 days and 900 CPU hours.
FEN: kr6/1pp2pp1/1p4p1/4p3/4nb2/2N5/1PP1PP2/R5K1
Input: Reto, 2023-10-17
Last update: Reto, 2023-10-24 more...

19 - P1414407
Unto Heinonen
11783 Springaren 2009
1. ehrende Erwähnung
Abt. B, Retro
PR Vlaicu Crisan + Eric Huber

(15+9)
BP in 12.0

1. Sc3 Sf6 2. Se4 Sd5 3. Sg5 Sc3 4. Sxh7 g5 5. Sxf8 Th6 6. Sxd7 Tc6 7. Sxb8 Lh3 8. Sxc6 e6 9. Sxa7 Ke7 10. Sb5 Ta3 11. Sxa3 Kf6 12. Sb1 Sxb1
play all

Henrik Juel: C+ Stelvio 2.0 (1 second)
No shorter solutions (2024-01-10)
comment

Keywords: Homebase (w), Round Trip (S-12)
Genre: Retro
FEN: 3q4/1pp2p2/4pk2/6p1/8/7b/PPPPPPPP/RnBQKBNR
Input: Gunter Jordan, 2024-01-10
Last update: Gunter Jordan, 2024-01-10 more...