Die Schwalbe

41 problem(s) found in 941 milliseconds (displaying 41 problem(s)). [COMMENTDATE>=20220810 AND G='Retro' AND S='Probleemblad'] [download as LaTeX]

1 - P0003666
Johannes Jacob Burbach
Alain C. White

392 Probleemblad 03/1947
P0003666
(5+8) C+
h#2
b) +sBh6
a) 1. Ta6! Lxc3 2. Ta2 0-0#
b) 1. Ta5! Kd1 2. Ta2 Kc2#
play all play one stop play next play all
Henrik Juel: In b) White may not castle, because last move was done by Ke1 or Th1 (2023-12-02)
A.Buchanan: Cute. Do wPe2 & bPe3 serve any purpose, however? (2023-12-03)
more ...
comment
Keywords: Cant Castler, Castling (wk), Superseded by (P1413924)
Genre: h#, Retro
Computer test: HC+ Popeye 4.61 & simple retro logic
FEN: 5n1q/6B1/5r2/7r/5p2/2p1p3/1P2P3/k3K2R
Input: Gerd Wilts, 1995-06-03
Last update: A.Buchanan, 2023-12-05 more...
2 - P0004224
Karl Fabel
Probleemblad 1960
P0004224
(12+13)
#2
1. 0-0-0! ... 2. Txd7#
R: 1. ... Lh2-g1 2. Lg1-f2 Sg7-h5 3. Lf2-g1 Sf5-g7 4. Lg1-f2 Sd4-f5 5. Lf2-g1 Sb3-d4 6. Lg1-f2 Sc5-b3 7. Lf2-g1 Sa6-c5 8. Lg1-f2 Sc5xBa6 9. Lf2-g1 Se4-c5 10. Lg1-f2 Sf2-e4 11. f3-f4 Sh1-f2 12. Lf2-g1 Lg1-h2 13. a5-a6 h2-h1=S 14. a4-a5 h3-h2 15. h2xSg3 Sh5-g3 16. Lg3-f2 Sg7-h5 17. Le5-g3 Sh5-g7 18. Lc3-e5 Sg7-h5 19. Ld2-c3 Sh5-g7 20. Lc1-d2 Sg3-h5 21. d2xSe3 Sd5-e3 22. a3-a4 Le3-g1 23. a2-a3 Lh6-e3 24. c3-c4 Lf8-h6 25. c2-c3 g7xSf6 26. Sh5-f6 Sf4-d5 27. f6-f7 etc.
play all play one stop play next play all
Henrik Juel: 1.0-0-0 (2.Txd7#). -1... Lh2 -2.Lg1, Sh5 uncaptures wPa6 and unpromotes on h1, then retract h2xg3, Lf2 via f4 to c1, d2xe3, Lg1 to f8, g7xf6 etc. (2004-01-12)
Henrik Juel: C+ Popeye 4.61 (2023-07-14)
comment
Keywords: Castling (wg), Phoenix (n)
Genre: Retro, 2#
FEN: RrrkB3/pppbpP2/2p1pp2/7n/2P2P2/4P1P1/1P3BP1/R3K1b1
Reprints: 549 FIDE Album 1959-1961 1966
Input: Gerd Wilts, 1995-06-03
Last update: James Malcom, 2023-07-15 more...
3 - P0008413
Guus Rol
Harry Goldsteen

Probleemblad 1 01-02/1989
P0008413
(8+12)
#2 durch Schwarz
1. Kxc2 Sb3 2. ... Tc1#

Bsp-Auflösung Zvi Mendlowitz(PDB 2022-09-19)
R: 1. ... Ta2-a1 2. a3xLb4 Lf8-b4 3. Lb4-c3 Kb3-a4 4. Le7-b4 a7xSb6 5. Sa4-b6 Dd5-d4 6. Sc3-a4 Dd4-d5 7. Sb1-c3 Ta1-a2 8. Lf6-e7 Kb4-b3 9. a2-a3 Kc5-b4 10. Lg5-f6 Kd6-c5 11. Lf6-g5 Kd7-d6 12. Le7-f6 Kc8-d7 13. Lf6-e7 Kb8-c8 14. Ld8-f6 e7-e6 15. d7-d8=L Kc8-b8 16. e6xTd7 Td8-d7 17. f5xLe6 0-0-0 18. f4-f5 Lc8-e6 19. f3-f4 Dd8-d4 20. f2-f3 d7xLc6 21. Lf3-c6 Sc6-a5 22. Le2-f3 Sb8-c6 23. Lf1-e2 Sc6-b8 24. e2xSd3 Sb4-d3 25. Kd1-c1 d3xDc2 26. Ke1-d1 e4xTd3 27. Dd1-c2 f5xDe4 28. Sa3-b1 Tc1-a1 29. Dh4-e4 Tc3-c1 30. Dh8-h4 Tb3-c3 31. Tc3-d3 g6xTf5 32. Tc1-c3 Tc3-b3 33. Ta1-c1 Tc1-c3 34. h7-h8=D Tc3xLc1 35. h6-h7 Tg3-c3 36. Th5-f5 Sb8-c6 37. Th1-h5 Sd5-b4 38. h5-h6 Sf6-d5 39. h4-h5 Sg8-f6 40. h2-h4 Th3-g3 41. c2-c4 Th8-h3 42. Sb1-a3 h7xSg6 43. Sh4-g6 Sc6-b8 44. Sf3-h4 Sb8-c6 45. Sg1-f3
play all play one stop play next play all
"O, W, thuis..."
Henrik Juel: 1.Kxc2 Sb3 2.. Rc1#. -1.. Ra2 -2.a3:B Bf8 -3.Bb4 Kb3 -4.Be7 a7:S -5.Sa4 Qd5
-6.Sc3 Qd4 -7.Sb1 Ra1 -8.Bf6 Kb4 -9.a2 Kc5 -10.Bg5 Kd6 -11.Bf6 Kd7 -12.Be7 Kc8 -13.Bf6 Kb8 -14.Bd8 e7 -15.B=d7 Kc8 -16.e6:R Rd8 -17.f5:B 0-0-0 -18.f4 Bc8 -19.f3 Qd8 -20.f2 d7:B -21.Bf3 Sc6 etc. (2003-08-26)
Yoav Ben-Zvi: An attempt at a coherent argument that reveals the intricate sequence of events in the resolution while refuting substantial alternatives:
The promotion of wBc3, on d8 or f8, requires 2 captures by the promoting wP. These, together with the captures by wPd3 and wPb4, account for all 4 missing Black pieces. Black captured [wBc1] at home. The other 7 missing White pieces were captured by bPs. [wBf1] cannot be released (by wPe2xd3) until [bPh7] plays bPd3xc2 completing the capture of 5 White pieces. Therefore [wBf1] was captured by bPd7xBc6 (the remaining capture by Black on a light colored square), releasing [bBc8]. This means that [wBf1] is released (by wPe2xd3) before [bBc8] is released (by capturing the previously released wB on c6) so the bB could not have been the piece captured on d3. It also could not be captured on b4 (dark colored square) so it was captured by White's promoting pawn. This means the promotion could not have been played by capture from e7 as that would imply that the 2 captures by the promoting pawn were both on dark colored squares in contradiction with the requirement to capture [bBc8]. Therefore the promotion move was wPd7-d8=B with bK standing outside the squares c8,d7,d8,e8.
Looking backward: To avoid White retrostalemate the first 2 retractions must be -1...bRa2-a1+ -2.wPa3xb4.
After this, unlocking the South-West cage and extracting bRa2 requires retraction of wPe2xd3 which requires previous uncapture of wB by bPd7xBc6, so it can be retracted home to f1. bP standing on d7 implies that a bB must previously be uncaptured and retracted home to c8, preceded by retracting BPe7-e6 to clear the path of uncaptured bB to c8. Retreat of bP to e7 is preceded by uncapture and return home of [bBf8]. With both bBs locked at home and bP on e7 the Black Central cage is locked by retracting bPd7xBc6 so bK and bQ must also be retracted home first. It follows that bKa4 needs to exit the West cage before it has been unlocked (to get back home to e8 before the Black Central cage is locked). The bK cannot exit via b5 as this implies retraction of wPc3-c4+ but, with c3 occuppied by wP, bRa2 does not have a valid exit path (not via c3 as it is obstructed by wP or via f1 as it will be occupied by wB). wP standing on c4 prevents retracting bN away from a5 so bK cannot exit via a5. The only valid exit of the bK is via b4 implying retracton of wPa2-a3 which requires bRa2 to retract to a1 (vacating a2 for the wP) which requires provision of a shield, standing on b1, to protect wKc1 from bRa1.
After the unpromotion of wBc3, White has only pawn retractions left to make until a White officer is uncaptured. This is not enough to allow Black to complete the retro-maneuvers required in preparation for retracting bPd7xBc6 (getting bBs,bK,bQ home). It follows that, at some point in the middle of its preparation maneuver, Black will need to uncapture a White officer which provides the tempo retractions needed to complete the maneuver. This is only possible by bPa7xb6. With bP standing on a7, [bRa8] cannot be retracted home via the a file so it must retract to its original corner via row 8 before the bB is locked at c8. This implies that [bRa8] is uncaptured by a wP prior to unlocking of the cage.
Uncaptures by White prior to the unlocking of the South-West cage (one available on b4 and two by pawn unpromoted from wBc3) include uncaptures of both bBs and a bR since, as noted in the above analysis, all 3 must be uncaptured and retracted home before retracting bPd7xBc6 (all of which precedes the unlocking of the South-East cage). This means that the bN is uncaptured later (on d3) so it cannot provide the shield on b1. The shield also could not be provided by [bBc8] as this bishop must be returned home when it is needed to provide the shield. The only remaining possibility is that the shield on b1 is provided by a wN that is uncaptured by bPa7xNb6. The wN on b1 is immobile until the wK can be retracted away from c1 so here too, once the unpromotion occurs Black must perform the preparations for retraction of bPd7xBc6 (which now includes return of the uncaptured bR to a8 or b8) under time pressure, completing the required maneuvers before White runs out of tempo retractions. Having determined the structural elements it is not too difficult to construct a resolution that succeeds in preparing for retraction of bPd7xBc6 before White runs out of tempo retractions. The resolution maintains the following: delay the unpromotion (known from analysis above to be wPd7-d8=B) while retracting bK to b8; bQ to d4 and bB (uncaptured on b4) to f8 and continuing by retracting -1.wBd8-? Pe7-e6 -2.Pd7-d8=B Kc8-b8 -3.Pe6xRd7+ Rd8-d7 -4.Pf5xBe6 0-0-0 -5.Pf4-f5 Bc8-e6 -6.Pf3-f4 Qd8-d4 -7.Pf2-f3 Pd7xBf6 -8.Bc6-? Nc6-a5. Following this the wB is retracted to f1 allowing the unlocking of the cage by wPe2xNd3 and bRa1 is retracted back home to h8 via c1,c3. One of the White pieces uncaptured by bPc2 unpromotes on h8. The alternative of uncapturing the bR on b4 (instead of bB) fails to complete the preparations on time.
To draw attention to the rich, unconditional, content of the resolution the stipulation could be "Squares that must have been occupied by bRa1". This problem deserves a full SPG. The best I can manage is a game of 53.0 moves. (2018-12-23)
Zvi Mendlowitz: Proof game in 44.0 moves:
1. Nf3 Nc6 2. Nh4 Nb8 3. Ng6 hxg6 4. Na3 Rh3 5. c4 Rg3 6. h4 Nf6 7. h5 Nd5 8. h6 Nb4 9. Rh5 N8c6 10. Rf5 Rc3 11. h7 Rxc1 12. h8=Q Rc3 13. Rc1 Rb3 14. Rc3 gxf5 15. Rd3 Rc3 16. Qh4 Rc1 17. Qe4 Ra1 18. Nb1 fxe4 19. Qc2 exd3 20. Kd1 dxc2+ 21. Kc1 Nd3+ 22. exd3 Nb8 23. Be2 Nc6 24. Bf3 Na5 25. Bc6 dxc6 26. f3 Qd4 27. f4 Be6 28. f5 O-O-O 29. fxe6 Rd7 30. exd7+ Kb8 31. d8=B e6 32. Bf6 Kc8 33. Be7 Kd7 34. Bf6 Kd6 35. Bg5 Kc5 36. Bf6 Kb4 37. a3+ Kb3 38. Be7 Ra2 39. Nc3 Qd5 40. Na4 Qd4 41. Nb6 axb6 42. Bb4 Ka4 43. Bc3 Bb4 44. axb4 Ra1+ (2022-09-19)
comment

Genre: Retro
FEN: 8/1pp2pp1/1pp1p3/n7/kPPq4/2BP4/1PpP2P1/r1K5
Input: Gerd Wilts, 1996-09-17
Last update: Mario Richter, 2022-09-19 more...
4 - 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...
5 - 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...
6 - 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...
7 - 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...
8 - 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...
9 - P1000618
Michel Caillaud
R076 Probleemblad 01/2000
P1000618
(12+14)
KBP?
a) Weiß am Zug
b) Schwarz am Zug
a) 1. e3 h6 2. Ld3 Th7 3. Lxh7 Sf6 4. Ld3 Se4 5. Lb5 Sxd2 6. c4 Sf1 7. Ld2 Sxh2 8. La5 Sg4 9. Kd2 Sxe3 10. Kc3 Sxg2 11. Kb4 Sf4 12. Sc3 Sh3 13. Txh3 h5
b) 1. e4 Sf6 2. Lb5 Sxe4 3. c4 Sxd2 4. Lxd2 h5 5. La5 Th6 6. Kd2 Tg6 7. Kc3 Txg2 8. Kb4 Txh2 9. Sc3 Th3 10. Txh3
play all play one stop play next play all
Differenz von 3,5 Zügen zwischen zwei eindeutigen, verschieden langen Beweispartien, bei denen nur angegeben wird, wer am Zug ist, nicht wielang die BP ist.
Henrik Juel: Part b) is C+ by Natch 3.1 and no solution was found in 8.5
For part a) the program ran for an hour without finding the solution in 13.0 (2018-12-14)
Moldenhauer: Computerprüfung: C+ a und b Stelvio 1.2 a) 00:04:57 Minuten.(hh:mm:ss)
b) 1 Sekunde. Keine Lösung a) BP 12.0, b) BP 8.5.
KBP a) BP 13.0, b) BP 9.5. (2023-05-28)
comment
Keywords: Unique Proof Game, twins length delta (3.5)
Genre: Retro
FEN: rnbqkb2/ppppppp1/8/BB5p/1KP5/2N4R/PP3P2/R2Q2N1
Input: Gerd Wilts, 2000-08-01
Last update: A.Buchanan, 2022-08-24 more...
10 - P1000627
Satoshi Hashimoto
R061 Probleemblad 07/1999
P1000627
(14+15) C+
BP in 18,0
1. e3 f5 2. Lb5 f4 3. Lc6 dxc6 4. Se2 Dd5 5. Tg1 Df3 6. gxf3 Lh3 7. Tg6 Lf1 8. Td6 g5 9. b4 g4 10. Lb2 g3 11. Ld4 g2 12. c3 g1=D 13. Dc2 Dg5 14. Sg3 La6 15. Df5 b5 16. Kf1 exd6 17. Kg1 Dd8 18. Sf1 Lc8
play all play one stop play next play all
Moldenhauer: Computerprüfung: Keine Lösung BP 17.5. (2023-08-17)
comment
Keywords: Unique Proof Game, Pronkin Theme (d), Pure Round Trip (l)
Genre: Retro
Computer test: Resolution time : 26.37 s., Natch 2.3 Copyright (C) 1997,98,99,2001,2002,2003,2004 Pascal Wassong
FEN: rnbqkbnr/p1p4p/2pp4/1p3Q2/1P1B1p2/2P1PP2/P2P1P1P/RN3NK1
Reprints: 13 64 Proof Games 2012
Input: Gerd Wilts, 2000-08-01
Last update: Gerd Wilts, 2012-12-23 more...
11 - P1000633
Satoshi Hashimoto
R080 Probleemblad 03-04/2000
P1000633
(13+15) C+
BP in 29.5
1. Sc3 h5 2. Se4 h4 3. Sg3 hxg3 4. h3 Th4 5. Th2 gxh2 6. a3 hxg1=L 7. a4 Lh2 8. a5 Ld6 9. g3 La3 10. Lg2 c5 11. Ld5 Db6 12. La2 Db3 13. Lb1 b5 14. La2 Lb7 15. Lb1 Ld5 16. La2 Sc6 17. Lb1 0-0-0 18. La2 Kb7 19. Lb1 Tc8 20. La2 Sd8 21. Lb1 Tc6 22. La2 Tg6 23. Lb1 Tgg4 24. La2 g5 25. Lb1 Lg7 26. La2 Lc3 27. dxc3 Le6 28. Dd5+ Ka6 29. Ld2 f6 30. 0-0-0
play all play one stop play next play all
14 Pendelzüge des wLf1
ras@bsiag.com: Stelvio 1.0 ist gut in solchen Dingen, C+ in 15sec. (2023-02-10)
Moldenhauer: Computerprüfung Ergänzung: Keine Lösung: BP 29.0. (2023-07-29)
comment
Keywords: Unique Proof Game, Pendulum (L x14)
Genre: Retro
Computer test: Stelvio 1.0
FEN: 3n2n1/p2pp3/k3bp2/PppQ2p1/6rr/bqP3PP/BPPBPP2/2KR4
Reprints: 23 64 Proof Games 2012
Input: Gerd Wilts, 2000-08-01
Last update: James Malcom, 2023-05-04 more...
12 - P1000634
Michel Caillaud
R081 Probleemblad 03-04/2000
P1000634
(12+13) C+
BP in 40,5
1. d4 h5 2. d5 h4 3. d6 h3 4. dxc7 hxg2 5. h4 a5 6. h5 a4 7. h6 a3 8. h7 axb2 9. hxg8=T Th4 10. a4 Tg4 11. Thh8 Ta5 12. Sh3 Tah5 13. a5 d5 14. a6 d4 15. a7 Dd5 16. a8=T Sd7 17. Tb8 g1=L 18. Taa8 Lh2 19. Sa3 b1=T 20. e4 Tb6 21. e5 Tbh6 22. e6 Sb6 23. exf7+ Kd7 24. c4 e5 25. c5 Ld6 26. f8=T e4 27. Te8 Ldg3 28. c6+ Kd6 29. Lb5 Le6 30. c8=T e3 31. c7 e2 32. Ld7 exd1=L 33. Kf1 d3 34. f4 d2+ 35. f5 dxc1=D 36. f6 De3 37. f7 La4 38. f8=T Lf7 39. Tcd8 D3e6 40. c8=T Lb5+ 41. Sc4+
play all play one stop play next play all
Henrik Juel: Natch 3.1 found nothing in an hour (2018-12-14)
more ...
comment
Keywords: Unique Proof Game, Non-standard material (TTTTTTtlld), Ornament
Genre: Retro
Computer test: C+ in about 56h using Stelvio 1.11 and lots of RAM (Reto)
FEN: RRRRRRRR/1p1B1bp1/1n1kq2r/1b1q3r/2N3r1/6bN/7b/5K2
Reprints: H37 FIDE Album Annexe 1998-2000 2009
Input: Gerd Wilts, 2000-08-01
Last update: A.Buchanan, 2023-03-13 more...
13 - P1000641
Thierry Le Gleuher
R047 Probleemblad 03/1999
P1000641
(15+11) cooked
KBP 19,5
1. a4 h5 2. a5 h4 3. a6 h3 4. axb7 hxg2 5. h4 g5 6. Th3 g4 7. Td3 g3 8. Sf3 g1=S 9. Txd7 Sh3 10. Lxh3 g2 11. d3 g1=L 12. Kf1 a5 13. Se1 a4 14. f3 Le3 15. Lxe3 a3 16. Sd2 a2 17. Tc1 a1=D 18. Sb3 Da5 19. Dd2 Dc3 20. Dxc3
play all play one stop play next play all
Moldenhauer: Computerprüfung: Cooked Stelvio 1.31 8 Sekunden.
Keine Lösung: BP 19.0.
Beispiel: 1.a4 h5 2.a5 h4 3.a6 h3 4.axb7 hxg2 5.h4 g5 6.Th3 g4 7.Td3 g3
8.Sf3 g1=S 9.Txd7 Sh3 10.Lxh3 g2 11.d3 g1=S 12.Kf1 a5 13.Se1 Sf3 14.Le3 Sd2+
15.Dxd2 a4 16.Dc3 a3 17.Sd2 a2 18.Tc1 a1=S 19.f3 Sb3 20.Sxb3 (2023-06-19)
comment
Keywords: Unique Proof Game, Homebase
Genre: Retro
FEN: rnbqkbnr/1PpRpp2/8/8/7P/1NQPBP1B/1PP1P3/2R1NK2
Input: Gerd Wilts, 2000-08-01
Last update: Silvio Baier, 2023-08-15 more...
14 - P1000642
Satoshi Hashimoto
R048 Probleemblad 03/1999
3. Preis
P1000642
(14+15) C+
BP in 23,0
1. e4 Sf6 2. Df3 Sh5 3. Df6 exf6 4. e5 Ld6 5. e6 0-0 6. e7 Sc6 7. e8=D Tb8 8. De4 Te8 9. Ld3 Te5 10. Se2 Tb5 11. 0-0 Tb3 12. axb3 Kf8 13. Ta6 bxa6 14. Da4 Tb5 15. Le4 Te5 16. d3 Te8 17. Lf4 Ke7 18. Sd2 Th8 19. Ta1 Ke8 20. Kf1 Lf8 21. Ke1 Se7 22. Sf1 c6 23. Lb8 Sg8
play all play one stop play next play all
Weiß und Schwarz haben klein rochiert, wTa1 stammt von h1, sTh8 stammt von a8.
Henrik Juel: Natch 3.1 did nothing in almost an hour (2018-12-13)
more ...
comment
Keywords: Unique Proof Game, Impostor (Tts), Switchback (Kkl), Castling, Promotion
Genre: Retro
Computer test: Moldenhauer: Computerprüfung: C+ Stelvio 1.11 84:43:01 Stunden. (hh:mm:ss) Keine Lösung: BP 22.0, BP 22.5.
FEN: 1Bbqkbnr/p2p1ppp/p1p2p2/7n/Q3B3/1P1P4/1PP1NPPP/R3KN2
Reprints: feenschach 153, p. 195, 10-12/2003
82 Die Schwalbe 250A, p. 260, 08/2011
7 64 Proof Games 2012
Input: Gerd Wilts, 2000-08-01
Last update: A.Buchanan, 2023-04-01 more...
15 - P1000651
Gianni Donati
R057 Probleemblad 05/1999
P1000651
(13+15) C+
BP in 22,0
1. g3 Sh6 2. Lg2 Sf5 3. Lc6 dxc6 4. Kf1 Kd7 5. Kg2 Kd6 6. Kf3 Sh4+ 7. Ke3 Lh3 8. Df1 e6 9. Dg2 Le7 10. De4 Lf6 11. Dg6 hxg6 12. Sf3 Th5 13. Tg1 Td5 14. Tg2 Td3 15. exd3 Kd5 16. Ke2 Dd6 17. Kf1 Sd7 18. Kg1 Th8 19. Kh1 Th5 20. Tg1 Te5 21. Tf1 Te1 22. Kg1 Txf1#
play all play one stop play next play all
Henrik Juel: typos in solution, should read: 5.Kg2 Kd6 6.Kf3 Sh4+ 7.Ke3
Fake castling, the hard way in 12 moves
First 21.5 moves found OK by Natch 3.1 (2018-12-13)
more ...
comment
Keywords: Unique Proof Game, Castling Paradox
Genre: Retro
Computer test: Computerprüfung: C+ Stelvio 1.0 09:09:13 Stunden. (hh:mm:ss) Keine Lösung: BP 21.0, BP 21.5.
FEN: 8/pppn1pp1/2pqpbp1/3k4/7n/3P1NPb/PPPP1P1P/RNB2rK1
Input: Gerd Wilts, 2000-08-01
Last update: A.Buchanan, 2023-03-13 more...
16 - P1000659
Michel Caillaud
R071 Probleemblad 11/1999
P1000659
(11+15)
KBP 27,5
1. e4 h5 2. Dg4 hxg4 3. Sf3 gxf3 4. Le2 fxe2 5. Tf1 exf1=L 6. b4 La6 7. b5 Th3 8. bxa6 b5 9. La3 Lb7 10. Ld6 exd6 11. Sc3 Le7 12. Se2 Lf6 13. Sg1 Lc3 14. e5 La5 15. e6 Tc3 16. h4 Le4 17. h5 Sc6 18. h6 Tb8 19. h7 Tb7 20. h8=D Db8 21. Dh5 Sd8 22. Dd1 f6 23. e7 Kf7 24. e8=S c6 25. Sc7 b4 26. Sb5 b3 27. Sa3 b2 28. Sb1
play all play one stop play next play all
sBh7 schlägt DSLT. wDd1 und wSb1 sind Phönixfiguren, wSg1 ist wSb1.
Moldenhauer: Computerprüfung: C+ Stelvio 1.5 in 147:43:15 Stunden.(hhh:mm:ss)
Keine Lösung: BP 27.0 in 49:30:01 Stunden. (2023-08-17)
comment
Keywords: Ceriani-Frolkin Theme (l), Unique Proof Game, Pronkin Theme (DS), Impostor (S)
Genre: Retro
FEN: 1q1n2n1/pr1p1kp1/P1pp1p2/b7/4b3/2r5/PpPP1PP1/RN1QK1N1
Reprints: H35 FIDE Album Annexe 1998-2000 2009
Input: Gerd Wilts, 2000-08-01
Last update: Gerd Wilts, 2009-07-25 more...
17 - P1000660
Satoshi Hashimoto
R072 Probleemblad 11/1999
P1000660
(11+16) cooked
KBP 28,5
1. Sc3 h5 2. Se4 h4 3. Sg3 hxg3 4. h4 d5 5. Th2 gxh2 6. Tb1 hxg1=L 7. Ta1 Lh2 8. Tb1 Le5 9. Ta1 Lxb2 10. Tb1 Lxc1 11. Tb3 Dd6 12. Th3 Sd7 13. Th1 Dh2 14. Tg1 e5 15. Th1 Lfa3 16. Tg1 Se7 17. Th1 0-0 18. Tg1 Kh8 19. Th1 Tg8 20. Tg1 Sf8 21. Th1 Ld7 22. Tg1 Te8 23. Th1 Sc8 24. Tg1 Te6 25. Th1 Tc6 26. Tg1 Tc3 27. Th1 c5 28. Tg1 c4 29. Th1
play all play one stop play next play all
paul: Cook: 1.b4 d5 2. h4 c6 3. Nf3 h6 4. Ng5 Qc7 5. Bb2 Nd7 6. b5 hg5 7. Be5 cb5 8. Rg1 g4 9. Bh2 g3 10. Na3 gh2 11. Rb1 hg1=B 12. Nc4 Bh2 13.Rb3 Bd6 14. Rh3 Ba3 15. Rh1 Bc1 16. Nb6 Qh2 17. Rg1 e5 18. Rh1 Bfa3 19. Rg1 Ne7 20. Rh1 0-0 21. Rg1 Kh8 22. Rh1 Rg8 23. Rg1 Nf8 24. Rh1 Bd7 25. Rg1 Rc8 26. Rh1 Rc3 27. Nc4 Nc8 28. Rg1 bxc4 29.Rh1. (2010-09-05)
Moldenhauer: Computerprüfung: Cooked Stelvio 1.4 1 Sekunde.
KBP = 27.0, keine Lösung BP 26.5.
Beispiel: 1.Sa3 d5 2.Sc4 Dd6 3.Se3 Sd7 4.Sg4 h5 5.h4 hxg4 6.Th3 gxh3 7.Tb1 h2 8.b4 hxg1=L
9.Tb2 Lh2 10.Tb3 Le5 11.La3 Lb2 12.Th3 Lc1 13.Th1 Dh2 14.Lb2 e5 15.b5 La3 16.Tg1 Se7
17.Th1 0–0 18.Tg1 Kh8 19.Th1 Tg8 20.Tg1 Sf8 21.Th1 Ld7 22.La1 Tc8 23.b6 cxb6 24.Ld4 Tc3
25.Tg1 Sc8 26.Lc5 bxc5 27.Th1 c4
Die Notation ganz oben ist falsch! 1.Sc3 h5 2.Sd4 ist nicht möglich. (2023-06-23)
comment
Keywords: Unique Proof Game, Pendulum (T x2), corner to corner (a1-h1)
Genre: Retro
FEN: 2n2nrk/pp1b1pp1/8/3pp3/2p4P/b1r5/P1PPPPPq/2bQKB1R
Input: Gerd Wilts, 2000-08-01
Last update: James Malcom, 2023-06-24 more...
18 - P1000661
Unto Heinonen
R073 Probleemblad 11/1999
P1000661
(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 play one stop play next 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...
19 - P1000662
Gianni Donati
R074 Probleemblad 11/1999
P1000662
(10+14) C+
h#1.5 (AP)
1. ... gxh6ep 2. exf1=L 0-0-0#
play all play one stop play next play all
Kommentare:
Als einziger letzter schwarzer Zug, der die weiße Rochade
erhält, kommt nur Bh7-h5 infrage, was dem Weißen den e.p.-Schlag
ermöglicht, um nicht die Rochade oder das Mattnetz zerstören zu
müssen (H.P.Suwe)
Gianni Donati: This intends to show the Valladao theme in the minimum number of moves. (2004-03-19)
VL: The waiting ep capture. Cf. also P1000260
(by T.Petrovic, 2000) somewhat enriched
thematically with the illegal try 2... Rd1#??. (2004-06-03)
A.Buchanan: The “illegal try” 2. Rd1+ is not actually mate because c2 is unprotected. This is kind of “logic dual” spoils the A.P. motivation for the castling (2020-05-20)
Henrik Juel: White captured h6xg7 and once more, e.g. axPb-b8=Y
Black captured cxdxe, dxexf, fxg, and once more, e.g. a2xb1=Y
Possible retroplay 1... h7-h5 2.h6xSg7 Df8-f4 3.h5-h6 Sf4-h3 4.Sh3-g1 etc., preserving the castling right
Any other black last move would force White to retract Ta1, as d2xc3, d2xe3, and h6xh7 would be illegal retractions
I agree with Andrew that the double motivation of 2... 000# is a weakness:
a. legitimizing h7-h5
b. mating (2020-05-21)
Vaclav Kotesovec: Similar problems should not be labeled as "C+". Such a designation is only acceptable if the entire analysis was performed by a computer program. (2023-08-03)
A.Buchanan: See discussion at P0009121 (2023-08-04)
more ...
comment
Keywords: a posteriori (AP), En passant, En passant as key, Castling, Valladao Task, Promotion (l)
Genre: Retro
Computer test: HC+ Popeye v4.87 + simple retro logic
FEN: 6n1/4p1P1/6p1/6Pp/2b1rqrb/2PkPppn/1P2pP2/R3KRN1
Reprints: König & Turm (4), p. 28, 03/2001
H Problemkiste (143) 10/2002
(V2) Problemkiste 156 12/2004
Input: Gerd Wilts, 2000-08-01
Last update: A.Buchanan, 2023-08-03 more...
20 - P1000920
Unto Heinonen
R063c Probleemblad 09-10/2000
2. Preis
P1000920
(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 play one stop play next 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...
21 - P1004047
Mark Kirtley
Gianni Donati

R150 Probleemblad 5 09-10/2001
1. Lob
P1004047
(11+15) C+
BP in 25,0
1. h4 f5 2. Th3 f4 3. Tb3 f3 4. Tb6 axb6 5. h5 Ta3 6. h6 Td3 7. a4 gxh6 8. a5 bxa5 9. Ta4 b6 10. Td4 Lb7 11. Td6 exd6 12. e3 Se7 13. De2 Sc8 14. Kd1 Le7 15. De1 0-0 16. Le2 Kh8 17. Df1 fxe2+ 18. Ke1 Tf3 19. Sa3 Th3 20. g3 Lh1 21. Dg2 Dg8 22. Dc6 Db3 23. cxb3 Ld8 24. Dc2 c6 25. Dd1 Lc7
play all play one stop play next play all
7zügiges Tempoverlustmanöver der wD, die kompliziert auf dem Königsflügel freigeschleust werden muss.
more ...
comment
Keywords: Unique Proof Game, Tempo Loss, Pure Round Trip (D), Switchback (K), Castling
Genre: Retro
Computer test: Stelvio 1.0
FEN: 1nn4k/2bp3p/1ppp3p/p7/8/NP1rP1Pr/1P1PpP2/2BQK1Nb
Reprints: Best Problems 47 07/2008
Input: Gerd Wilts, 2002-04-05
Last update: A.Buchanan, 2023-05-14 more...
22 - P1007321
Thierry Le Gleuher
R196 Probleemblad 2 04/2003
P1007321
(6+16) C+
BP in 25,0
1. c4 Sf6 2. c5 Tg8 3. c6 Sxc6 4. g4 Se5 5. g5 c5 6. g6 Sxg6 7. h4 Sh8 8. h5 g6 9. h6 Lxh6 10. d4 Lxc1 11. b4 h6 12. b5 Sh7 13. b6 Dxb6 14. Sd2 Db1 15. a4 b5 16. a5 b4 17. a6 Lxa6 18. e3 Lxf1 19. f4 a5 20. f5 Ta6 21. f6 Txf6 22. e4 d6 23. e5 Kd7 24. e6+ Kxe6 25. d5+ Kxd5
play all play one stop play next play all
Moldenhauer: Computerprüfung: C+ Stelvio 1.0 1 Sekunde.
Keine Lösung: BP 24.0, BP 24.5. (2023-02-14)
comment
Keywords: Unique Proof Game, Tempo Loss (B1)
Genre: Retro
Computer test: Stelvio 1.0
FEN: 6rn/4pp1n/3p1rpp/p1pk4/1p6/8/3N4/RqbQKbNR
Input: Gerd Wilts, 2003-04-27
Last update: Silvio Baier, 2023-03-02 more...
23 - P1011934
Gligor Denkovski
R219 Probleemblad 12/2003
P1011934
(12+13) C+
BP in 20,0
1. e4 h5 2. Dxh5 a5 3. Dxa5 Txh2 4. g3 Txf2 5. Th8 Txd2 6. Lh3 Th2 7. Lh6 Th1 8. Kd2 g6 9. Kc3 Lg7+ 10. Kb3 Lxb2 11. Sc3 Ta6 12. Td1 Tf6 13. Txd7 Tf1 14. Td6 Ta1 15. Ta6 b6 16. Ta8 La6 17. Lf8 Lf1 18. Da7 Sa6 19. Sge2 Db8 20. Lc8 Lc1
play all play one stop play next play all
Platzwechsel aller Türme und Läufer.
more ...
comment
Keywords: Unique Proof Game, Interchange, Belfort (TTLLttll)
Genre: Retro
Computer test: HJ: I forgot to kill Natch and discovered later that the solution was found Moldenhauer: Computerprüfung: C+ Stelvio 1.11 04:24:38 Stunden. (hh:mm:ss) Keine Lösung: BP 19.0, BP 19.5.
FEN: RqB1kBnR/Q1p1pp2/np4p1/8/4P3/1KN3P1/P1P1N3/r1b2b1r
Input: Gerd Wilts, 2004-01-04
Last update: A.Buchanan, 2023-03-25 more...
24 - P1013081
Rustam Ubaidullajew
R228 Probleemblad 02/2004
2. Lob
P1013081
(16+16) C+
BP in 21,5
1. Sc3 f6 2. Sd5 Kf7 3. c3 Ke6 4. Da4 Ke5 5. b3 e6 6. Lb2 Lb4 7. 0-0-0 d6 8. De8 c6 9. Kc2 Da5 10. Kd3 b6 11. Ke3 La6 12. Kf3 Lc4 13. Kg4 Sh6+ 14. Kh5 Sg4 15. La1 h6 16. Kg6 a6 17. Kf7 g6 18. Ke7 Ta7+ 19. Kd8 Tg7 20. Kc8 Sd7 21. Kb7 Th7 22. Ka8
play all play one stop play next play all
Langer Marsch des wK nach a8 über den Königsflügel, da der Damenflügel zugemauert ist, in einer schlaglosen BP.
Henrik Juel: Natch 3.1 did nothing in more than an hour (2018-12-19)
Moldenhauer: Computerprüfung: C+ Stelvio 1.11 00:08:53 Minuten. (hh:mm:ss)
Keine Lösung: BP 20.5, BP 21.0. (2023-03-22)
comment
Keywords: Unique Proof Game, Promenade (K), Capture-free
Genre: Retro
Computer test: Stelvio 1.11
FEN: K3Q3/3n2rr/pppppppp/q2Nk3/1bb3n1/1PP5/P2PPPPP/B2R1BNR
Input: Gerd Wilts, 2004-02-20
Last update: Silvio Baier, 2023-03-27 more...
25 - P1013082
Reto Aschwanden
R229 Probleemblad 02/2004
1. Preis
P1013082
(14+10) C+
BP in 21,5
1. a4 f5 2. Ta3 f4 3. Th3 f3 4. Th4 fxg2 5. Sh3 g1=D 6. f4 Db6 7. Sc3 Dxb2 8. Lxb2 g5 9. Db1 g4 10. Sd1 g3 11. Le5 g2 12. c3 g1=S 13. Dxh7 Sf3+ 14. exf3 Sc6 15. Ld3 Sd4 16. 0-0 Se2+ 17. Kh1 Sg1 18. Txg1 c6 19. Txg8 Db6 20. Lg6+ Kd8 21. d3 Dg1+ 22. Sxg1
play all play one stop play next play all
Schlag der beiden Anti-Pronkin-Steine Dg1 und Sg1 (auf demselben Feld!)
Reto: Solving in parallel with Stelvio v1.25 at brings this down to 24h (with room for improvement still) (2023-05-28)
comment
Keywords: Anti-Pronkin (ds), Ceriani-Frolkin Theme (ds), Unique Proof Game
Genre: Retro
Computer test: Stelvio 1.2, 101h. This is way too slow...
FEN: r1bk1bRr/pp1pp2Q/2p3B1/4B3/P4P1R/2PP1P2/7P/3N2NK
Input: Gerd Wilts, 2004-02-20
Last update: Reto, 2023-05-15 more...
26 - P1013083
Roberto Osorio
Jorge Joaquin Lois
Oscar Cuasnicú

R230 Probleemblad 02/2004
3. Lob
P1013083
(15+15) C+
BP in 21,5
1. g3 Sa6 2. Lg2 Tb8 3. Lc6 bxc6 4. Sf3 Tb3 5. 0-0 Ta3 6. bxa3 e6 7. Lb2 Le7 8. Ld4 Lh4 9. Sc3 Dg5 10. Tb1 Se7 11. Tb8 0-0 12. Db1 Lb7 13. Te8 Sg6 14. Te7 Ta8 15. Te8+ Sf8 16. Td8 Lc8 17. Db7 Db5 18. Ta1 Db1+ 19. Se1 Dd1 20. Sb1 Sb8 21. Lb2 a6 22. Lc1
play all play one stop play next play all
Aufwändige Manöver zum Einschleusen des wTa1 nach d8 und der sD nach d1. wTa1/sTa8 sind wTh1/sTh8.
Moldenhauer: Computerprüfung: C+ Stelvio 1.11 00:10:35 Minuten. (hh:mm:ss)
Keine Lösung: BP 20.5, BP 21.0. (2023-03-16)
comment
Keywords: Unique Proof Game, Promenade, Interchange, Castling (2), Switchback (LSls), Impostor (Tt)
Genre: Retro
Computer test: Stelvio 1.11
FEN: rnbR1nk1/1Qpp1ppp/p1p1p3/8/7b/P5P1/P1PPPP1P/RNBqN1K1
Reprints: (81) Die Schwalbe 250A 08/2011
Input: Gerd Wilts, 2004-02-20
Last update: Silvio Baier, 2023-03-20 more...
27 - P1066789
Göran Wicklund
R259 Probleemblad 5 09-10/2004
5. Preis
P1066789
(16+11) C+
BP in 29,5
1. h4 Sc6 2. h5 Sd4 3. h6 Sb5 4. hxg7 h5 5. Th3 h4 6. Tg3 h3 7. a4 h2 8. a5 h1=D 9. a6 Dh2 10. axb7 a5 11. bxa8=T Lb7 12. Ta4 Lc6 13. Th4 a4 14. d4 a3 15. d5 a2 16. d6 a1=S 17. dxc7 Sb3 18. Ta1 Sa3 19. c8=T La4 20. Ta8 Db8 21. f4 Kd8 22. f5 Kc7 23. f6 Kb6 24. fxe7 Sf6 25. e8=T Ld6 26. Tc8 Te8 27. g8=T Te7 28. Tge8 Lc7 29. Tgg8 Dd6 30. Th1
play all play one stop play next play all
Zyklischer Platzwechsel sechs weißer Türme.
more ...
comment
Keywords: Unique Proof Game, Non-standard material, Interchange (TTTTTT), Impostor (TT)
Genre: Retro
Computer test: Moldenhauer: Computerprüfung: C+ Stelvio 1.11 00:05:59 Minuten. (hh:mm:ss) keine Lösung: BP 28.5, BP 29.0.
FEN: RqR1R1R1/2bprp2/1k1q1n2/8/b7/nn6/1PP1P1P1/RNBQKBNR
Reprints: (18) StrateGems 10-12/2007
(80) Die Schwalbe 250A 08/2011
Input: Gerd Wilts, 2004-10-17
Last update: Silvio Baier, 2023-08-15 more...
28 - P1067819
Jorge Joaquin Lois
Roberto Osorio

R269 Probleemblad 1 01-02/2005
P1067819
(15+15) C+
BP in 20,0
1. g4 h6 2. g5 hxg5 3. Lg2 Th3 4. Le4 Tb3 5. axb3 Sf6 6. Ta5 Sh5 7. Tf5 a5 8. d3 a4 9. Lf4 a3 10. e3 a2 11. Dg4 a1=T 12. Sf3 T1a6 13. 0-0 Tg6 14. Tc1 f6 15. Se1 Kf7 16. f3 Ke6 17. Te5+ Kd6 18. Td5+ Kc6 19. Ta5+ Kb6 20. Ta1 c5
play all play one stop play next play all
Der wT gibt dreimal Schach und Schachschutz für den sK.
Henrik Juel: Natch 3.1 found little in half an hour
Stopped at position 4 (2018-12-21)
Moldenhauer: Computerprüfung: C+ Stelvio 1.0 00:24:45 Minuten (hh:mm:ss).
Keine Lösung: BP 19.0, BP 19.5. (2023-03-01)
comment
Keywords: Unique Proof Game, Phoenix (t), Check Protection
Genre: Retro
Computer test: Stelvio 1.0
FEN: rnbq1b2/1p1pp1p1/1k3pr1/2p3pn/4BBQ1/1P1PPP2/1PP4P/RNR1N1K1
Input: Gerd Wilts, 2005-02-04
Last update: Silvio Baier, 2023-03-02 more...
29 - P1067973
Paul Raican
R247 Probleemblad 05-06/2004
P1067973
(13+12) C+
BP in 19,5
1. g4 b5 2. g5 Lb7 3. g6 Ld5 4. gxh7 Lxa2 5. hxg8=S Lxb1 6. Txa7 Txh2 7. Ta3 Ta4 8. Th3 Th4 9. c3 Lh7 10. Sxe7 Lg8 11. Sg6 Lb4 12. e4 La5 13. Dh5 b4 14. Dh8 Th7 15. Lb5 Dh4 16. d3 Kd8 17. Lg5+ Kc8 18. Ld8 De7 19. Th5 Th4 20. Th3
play all play one stop play next play all
Henrik Juel: Natch 3.1 found the solution, but did not conclude in an hour (2018-12-20)
paul: Stelvio verified in ~ 25 minutes. (2023-02-01)
comment
Keywords: Bahnung, Unique Proof Game, Promotion (S)
Genre: Retro
Computer test: Stelvio 1.0
FEN: 1nkB2bQ/2ppqppr/6N1/bB5R/1p2P2r/2PP3R/1P3P2/4K1N1
Input: Gerd Wilts, 2005-08-20
Last update: Silvio Baier, 2023-03-03 more...
30 - P1068530
Satoshi Hashimoto
Probleemblad 06/2005
P1068530
(16+16) C+
BP in 24,0
1. g4 d5 2. Lg2 d4 3. Lc6+ Sd7 4. Lb5 c6 5. f3 Da5 6. Kf2 Sb6 7. Kg3 Kd7 8. Kh4 g5+ 9. Kh5 Lg7 10. Sa3 Le5 11. Sc4 Sf6+ 12. Kh6 Ke6 13. Kg7 Sg8+ 14. Kf8 Lg7+ 15. Ke8 Lf8 16. Kd8 Ld7+ 17. Kc7 Td8 18. a3 Lc8 19. Kb8 Kd7 20. Se5+ Ke8 21. c4 Td6 22. Da4 Sd7+ 23. Ka8 Dd8 24. Da5 Sb8
play all play one stop play next play all
Henrik Juel: Natch 3.1 did little in half an hour
Stopped at pos. 1 (2018-12-22)
Moldenhauer: Computerprüfung: C+ Stelvio 1.11 00:05:37 Minuten. (hh:mm:ss)
Keine Lösung: BP 23.0, BP 23.5. (2023-04-02)
comment
Keywords: Unique Proof Game, Switchback (sldkls), Capture-free, Königswanderung
Genre: Retro
Computer test: Stelvio 1.11
FEN: Knbqkbnr/pp2pp1p/2pr4/QB2N1p1/2Pp2P1/P4P2/1P1PP2P/R1B3NR
Reprints: (H) Quartz 29 01-06/2006
53 64 Proof Games 2012
Input: Gerd Wilts, 2006-08-11
Last update: Silvio Baier, 2023-04-05 more...
31 - P1070024
Thierry Le Gleuher
R312v Probleemblad 10-12/2007
P1070024
(9+15) C+
BP in 29.5
1. e3 h5 2. Dg4 hxg4 3. Sf3 gxf3 4. Le2 fxe2 5. Tf1 exf1=L 6. Sc3 Lc4 7. Sa4 Le6 8. Sb6 axb6 9. b3 Ta5 10. La3 Tg5 11. Lc5 bxc5 12. a3 b5 13. a4 Lb7 14. a5 Le4 15. a6 c6 16. a7 Sa6 17. f3 Db8 18. f4 Kd8 19. f5 Kc7 20. f6 L4f5 21. e4 Kd6 22. e5+ Kxe5 23. h3 Kf4 24. h4 Kg3 25. h5 Kh2 26. h6 Kg1 27. hxg7 Th1 28. c3 Dh2 29. c4 Dh8 30. 0-0-0+
play all play one stop play next play all
paul: Five times delayed ascension of wPawns. See P0000309, the previous record. (2010-05-10)
Vladimir Rey: Probably, cook: Natch 3.3 test, first 28 moves. (2023-01-24)
A.Buchanan: According to Reto, Stelvio indicates this is sound (2023-01-25)
Vladimir Rey: OK! Wrong cook (white king moves: Kd1,Ke1 and castling is impossible, 30. 0-0-0+!) (2023-01-25)
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comment
Keywords: Unique Proof Game, Tempo Loss (BBBBB), Promotion (l), Non-standard material (l)
Genre: Retro
Computer test: Stelvio 1.4, 7min.
FEN: 5bnq/P2pppP1/n1p1bP2/1pp2br1/2P5/1P6/3P2P1/2KR2kr
Input: Gerd Wilts, 2008-09-08
Last update: Reto, 2023-06-28 more...
32 - P1080420
Thierry Le Gleuher
R284 Probleemblad 07-08/2005
P1080420
(14+13) C+
BP in 20,5
1. Sc3 f5 2. Sd5 Sf6 3. Sxe7 Sd5 4. Sg6 De7 5. a3 Dxa3 6. e4 d6 7. Se2 Kd7 8. Sc3 Kc6 9. Sb1 Sd7 10. Lb5+ Kxb5 11. e5 Ka4 12. e6 b5 13. e7 S7b6 14. exf8=S Ld7 15. Sxh7 Taf8 16. Sg5 Th4 17. Sh3 Tb4 18. Dg4 Le8 19. Dd4 f4 20. Sg1 Tf5 21. Sf8
play all play one stop play next play all
Henrik Juel: Cyclical shift by three white knights.
Sf8 is [Sb1], Sb1 is [Sg1], Sg1 is a promotee from f8 (2014-08-20)
Moldenhauer: Computerprüfung: C+ Stelvio 1.0 2 Sekunden.
Keine Lösung: BP 19.5, BP 20.0. (2023-03-02)
more ...
comment
Keywords: Unique Proof Game, Non-standard material
Genre: Retro
Computer test: Stelvio 1.0
FEN: 4bN2/p1p3p1/1n1p4/1p1n1r2/kr1Q1p2/q7/1PPP1PPP/RNB1K1NR
Reprints: (13) StrateGems 10-12/2007
Input: Gerd Wilts, 2009-01-06
Last update: Silvio Baier, 2023-03-03 more...
33 - P1080421
Reto Aschwanden
R285c Probleemblad 07-08/2005
P1080421
(13+13) C+
BP in 22,0
1. h4 c5 2. h5 c4 3. Th4 c3 4. Tc4 a6 5. Txc8 Sc6 6. Txa8 Db8 7. Ta7 Dg3 8. fxg3 d5 9. Kf2 d4 10. Kf3 d3 11. Kg4 dxc2 12. Kh4 cxb1=L 13. Db3 e5 14. Db6 e4 15. b3 e3 16. Lb2 exd2 17. e3 Lf5 18. Ld3 d1=T 19. Lc2 Td8 20. Td1 Ta8 21. La1 Lc8 22. Td7 Sb8
play all play one stop play next play all
Ersatz der beiden auf ihren Ursprungsfeldern geschlagenen sTa8 und sLc8 durch Pronkin-Figuren.
Reto: The 21.5 move paths leading to this position are known to me and they are not cooks in my eyes, as move parity is part of the position to find. Anyone who likes can think "exact spg" or similar if that helps them. (2023-03-13)
A.Buchanan: A number of different opinions exist. To me:
(1) a shorter PG, unique or not, does not cook a PG in x.y.
(2) This is true whether the delta is z.0 or z.5 moves.
(3) A composer may choose to include "exactly" in the stipulation, but if they choose not to then the composer's stipulation "Originalforderung" may not be fiddled with by later generations.
(4) However, there may be a "database stipulation" added by curators for uniformity within a catalogue, and if the database stipulation does not match the Originalforderung, then the Originalforderung must appear in an Originalforderung field, not just as a comment. [PDB does not support this feature.]
(5) Accidental shorter solutions do constitute a defect, in my view.
Again to say: this is just my personal opinion :) (2023-03-14)
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comment
Keywords: Unique Proof Game, Pronkin Theme (tl)
Genre: Retro
Computer test: Solving time: Natch 3.3: >10h, Euclide 1.11: >10h, Stelvio 1.15: 33:30min
FEN: rnb1kbnr/Rp1R1ppp/pQ6/7P/7K/1Pp1P1P1/P1B3P1/B5N1
Reprints: H34 Vkontakte 2013
H34 Phénix 261/262, p. 10354, 2013
Input: Gerd Wilts, 2009-01-06
Last update: Reto, 2023-03-30 more...
34 - P1080429
Rustam Ubaidullajew
R295 Probleemblad 11-12/2005
P1080429
(16+16) C+
BP in 25,5
1. e3 a5 2. Dh5 a4 3. Da5 h5 4. Ke2 Th6 5. Kd3 Te6 6. Kc4 Te4+ 7. Kb5 e6 8. h4 Ke7 9. Th3 Kf6 10. Tg3 Kf5 11. Tg6 Df6 12. Th6 c6+ 13. Kb6+ Kg4 14. Kc7 Df3 15. Kd8 Dd1 16. f3+ Kg3 17. Ke8 Kf2 18. Dd8 b6 19. g3 La6 20. Lh3 Lf1 21. d3 La3 22. Ld2 Se7 23. Lb4 Sg6 24. Lf8 Ke1 25. b4 Lc1 26. Th8
play all play one stop play next play all
Belfort 1994 theme.
paul: 1. e3 a5 2. Qh5 a4 3. Qa5 h5 4. Ke2 Rh6 5. Kd3 Re6 6. Kc4 Re4+ 7. Kb5 e6 8. h4 Ke7 9. Rh3 Kf6 10. Rg3 Kf5 11. Rg6 Qf6 12. Rh6 c6+ 13. Kb6+ Kg4 14. Kc7 Qf3 15. Kd8 Qd1 16. f3+ Kg3 17. Ke8 Kf2 18. Qd8 b6 19. g3 Ba6 20. Bh3 Bf1 21. d3 Ba3 22. Bd2 Ne7 23. Bb4 Ng6 24. Bf8 Ke1 25. b4 Bc1 26. Rh8. Belfort 1994 theme. (2013-08-12)
Moldenhauer: Computerprüfung: C+ Stelvio 1.0, 87 Sekunden.
Keine Lösung: BP 25.0 und BP 24.5. (2023-02-10)
comment
Keywords: Unique Proof Game, Capture-free, Belfort (KDTLkdll)
Genre: Retro
Computer test: Stelvio 1.0
FEN: rn1QKB1R/3p1pp1/1pp1p1n1/7p/pP2r2P/3PPPPB/P1P5/RNbqkbN1
Input: Gerd Wilts, 2009-01-06
Last update: Silvio Baier, 2023-03-02 more...
35 - P1080443
Vlaicu Crisan
Klaus Wenda

R310 Probleemblad 05-06/2006
P1080443
(4+4)
s#1 vor 16
Verteidigungsrückzüger, Typ Proca
Anticirce, Typ Cheylan
paul: -1.Bg7-h8 Bg1-h2+ -2.Kf2×Pg2(Ke1) Bh2-g1+ -3.Ke1-f2 Bg1-h2+ -4.Ke2×Pd2(Ke1) f4-f3+ -5.Kf2-e2 Bh2-g1+ -6.Kg3-f2 Bg1-h2+ -7.Bh8-g7 f5-f4+ -8.Kf2-g3 Bh2-g1+ -9.Ke1-f2 d3-d2+ -10.h7-h8=B Bg1-h2+ -11.Kh4×Bh5(Ke1) Bh2-g1+ (h2-h1=R? illegal) -12.Kg3-h4 Bg1-h2+ -13.Kf2-g3 Bh2-g1+ -14.Ke1-f2 Bg1-h2+ -15.Kg8×Qh8(Ke1) Qf6-h8+ -16.Bf4-e5 & 1.h8=S+ Q×h8(Qd8)# (2023-06-12)
comment
Keywords: Circe (Anti-), Defensive Retractor, Type Proca
Genre: Retro, Fairies
FEN: 7B/8/6k1/4B3/8/4Pp2/7b/4K2r
Reprints: H49 Vkontakte 2013
H49 Phénix 261/262, p. 10358, 2013
Input: Gerd Wilts, 2009-01-06
Last update: A.Buchanan, 2018-12-04 more...
36 - P1080653
Thierry Le Gleuher
R312 Probleemblad 08/2006
P1080653
(9+16) C+
BP in 28,5
1. e3 h5 2. Dg4 hxg4 3. Sf3 gxf3 4. Le2 fxe2 5. Tf1 exf1=L 6. Sc3 Lc4 7. Sa4 Le6 8. Sb6 axb6 9. b3 Ta5 10. La3 Tg5 11. Lc5 bxc5 12. a3 b5 13. a4 Lb7 14. a5 Le4 15. a6 c6 16. a7 Sa6 17. f3 Db8 18. f4 Kd8 19. f5 Kc7 20. f6 L4f5 21. e4 Kd6 22. e5+ Kxe5 23. h3 Kf4 24. h4 Kg3 25. h5 Kh2 26. h6 Kh1 27. h7 Sh6 28. b4 Tg8 29. 0-0-0+
play all play one stop play next play all
Henrik Juel: Natch 3.1 did not find the solution in 4 hours
Although the last move is obvious, testing the first 28.0 moves does help much, because after a couple of hours thousands of solutions appear with [Ta1,Ke1] having moved
The problems shows five hesitating white pawns (a2-a3-a4 instead of a2-a4, etc.)
The author claimed that this was a record in 2006 (2018-12-25)
Moldenhauer: Computerprüfung: C+ Stelvio 1.11 00:01:10 Minute. (hh:mm:ss)
Keine Lösung: BP 27.5, BP 28.0. (2023-04-08)
more ...
comment
Keywords: Unique Proof Game, Promotion (l), Non-standard material (l)
Genre: Retro
Computer test: Stelvio 1.11
FEN: 1q3br1/P2ppppP/n1p1bP1n/1pp2br1/1P6/8/2PP2P1/2KR3k
Input: Gerd Wilts, 2009-01-19
Last update: Silvio Baier, 2023-08-15 more...
37 - P1093133
Silvio Baier
R355 Probleemblad 3 07-09/2009
P1093133
(16+13) C+
BP in 25,0
1. Sc3 e5 2. Tb1 La3 3. bxa3 d5 4. Tb6 Lg4 5. Tf6 b5 6. h3 b4 7. hxg4 b3 8. Thh6 b2 9. Thg6 b1=L 10. Lb2 h5 11. Dc1 h4 12. Sd1 h3 13. c4 h2 14. c5 Th3 15. c6 Tf3 16. exf3 Lf5 17. Ld3 e4 18. Lb1 e3 19. d3 e2 20. Kd2 e1=L 21. Ke2 Lb4 22. Se3 Lf8 23. Dc5 h1=T 24. Lc3 Th8 25. Sh3 Lc8
play all play one stop play next play all
Silvio Baier: C+ (Natch 2.4) (2009-11-09)
Joost de Heer: In the records PDF at the Die Schwalbe site (https://dieschwalbe.de/download/artikel/Pronkin.pdf) there's a version with 25. Sh3 replaced by 25. Rh6, but this is cooked:
1. Nc3 e5 2. Rb1 Qf6 3. Nd5 Ba3 4. bxa3 Qf3 5. Rb6 h5 6. Rh6 b5 7. c4 b4 8.
c5 b3 9. c6 b2 10. exf3 b1=Q 11. Bb2 Qg6 12. Qc1 Qg3 13. Bd3 e4 14. hxg3 e3
15. Rh4 e2 16. Rf4 h4 17. Bb1 h3 18. Ne3 h2 19. d3 h1=Q 20. Kd2 e1=B+ 21.
Ke2 Bb4 22. g4 Bf8 23. Qc5 Qh4 24. Bc3 Qd8 25. Rff6 d5 (2023-07-22)
comment
Keywords: Unique Proof Game, Pronkin Theme (tll)
Genre: Retro
Computer test: Natch 2.4
FEN: rnbqkbnr/p1p2pp1/2P2RR1/2Qp4/6P1/P1BPNP1N/P3KPP1/1B6
Reprints: (12) Die Schwalbe 240 12/2009
Input: Gerd Wilts, 2009-10-27
Last update: Silvio Baier, 2014-11-04 more...
38 - P1304588
Andreas Thoma
R435 Probleemblad 04-06/2015
P1304588
(2+4)
-3 & s#1 Proca Retractor
Anti-Circe type Cheylan
paul: Actually, it is in four moves: 1.Ke1xPf2 f3-f2+ 2.Ke1xRf1 Rf2-f1+ 3.Kg1xQh1 Rd8-d5 4.Qg4-g2+ & 1.Qc8+ Rd1# (2022-05-17)
paul: The stipulation must be s=1 (in forward play).
Solution: -1.Ke1×Pf2(Ke1)! f3-f2 -2.Kf1×Pe2(Ke1) e3-e2 -3.Qc2-g2+ & 1.Qc8+ Rd1= (2022-12-08)
comment
Keywords: Defensive Retractor, Type Proca, Circe (Anti, Cheylan)
Genre: Retro, Fairies
FEN: k7/p7/8/3r4/8/7b/6Q1/4K3
Input: A.Buchanan, 2015-06-24
Last update: Frank Müller, 2015-07-07 more...
39 - P1304591
Nicolas Dupont
Andrey Frolkin

R434 Probleemblad 73, p. 66, 04-06/2015
P1304591
(11+15)
KBP in 36,5
1. d4 c5 2. d5 c4 3. d6 c3 4. dxe7 cxb2 5. c4 d5 6. c5 d4 7. c6 Dd5 8. c7 Kd7 9. e8=T b5 10. Te6 b4 11. Tb6 axb6 12. e4 Ta3 13. e5 La6 14. c8=T Th3 15. Tc6 b3 16. Th6 La3 17. e6+ Kc6 18. e7+ gxh6 19. e8=T Se7 20. Tg8 d3 21. Tg6+ fxg6 22. Dh5 Tf8 23. g4 Tff3 24. Lg2 Tfg3 25. Sf3 gxh5 26. 0-0 d2 27. g5 d1=L 28. Sbd2 b1=D 29. g6 b2 30. g7 Dg6 31. Te1 Sf5 32. Te8 b1=T 33. Th8 Tb4 34. Lb2 Lb3 35. Te1 Ld3 36. Tee8 Sa6 37. Teg8
play all play one stop play next play all
hans: 1. d4 c5 2. d5 c4 3. d6 c3 4. dxe7 cxb2 5. c4 d5 6. c5 d4 7. c6 Qd5 8. c7 Kd7 9. e8=R b5 10. Re6 b4 11. Rb6 axb6 12. e4 Ra3 13. e5 Ba6 14. c8=R Rh3 15. Rc6 b3 16. Rh6 Ba3 17. e6+ Kc6 18. e7+ gxh6 19. e8=R Ne7 20. Rg8 d3 21. Rg6+ fxg6 22. Qh5 Rf8 23. g4 Rff3 24. Bg2 Rfg3 25. Nf3 gxh5 26. O-O d2 27.g5 d1=B 28. Nbd2 b1=Q 29. g6 b2 30. g7 Qg6 31. Re1 Nf5 32. Re8 b1=R 33. Rh8 Rb4 34. Bb2 Bb3 35. Re1 Bd3 36. Ree8 Na6 37. Reg8

Composers: The content demonstrates one Ceriani-Frolkin rook with thematic square c8, two with thematic square e8, as well as the two original rooks both visiting square e8 (anti-Pronkin). It is now generally accepted that only one ‘supporting’ Ceriani-Frolkin is needed while performing two-fold anti-Pronkin theme on the same thematic square. In particular the second Ceriani-Frolkin with thematic square e8 is not involved in de the double anti-Pronkin part of the entry, and hence should be considered as thematic in itself.
This implies that the full thematic content is two anti-Pronkin rooks on the same square e8, as well as two Ceriani-Frolkin rooks on squares c8 and e8, respectively. This very new, difficult and homogeneous combination was our primary intention – it is symbolized, in the future proof game language developed in the special issue Die Schwalbe 250A, by the notation AP(R,R) & CF(R,R).
Concerning the construction, one has to ensure that the thematic captured pieces are the promoted ones and not the original ones (rebirthed after promotion). This is done here with the white g-pawn standing on g7 and the visible promoted Qg6. This couple may be constructed only when the three black captures gxh6, fxg6xh5 have already occured, and rather early in the game, as the above mentioned Queen is necessarily the first black promotion – among the 3 – which left its thematic square. We hope that it is enough to ensure the soundness of the entry.
Concerning computer analysis, this is over for Euclide after 24. Bg2 (Natch may go a bit further but not much) mainly because both programs are considering that after 24. … Rfg3, this rook may arrive to g3 in 2 moves (probably jumping over the white g-pawn!) This obviously could not be considered as a bug, but certainly as a flaw from those programs. The remaining part of our proof game has been checked with Popeye, using the a=b command. (2016-03-25)
Reto: Stelvio finds the solution quite quickly with v1.17 but full resolution would take weeks if not months with the current code. I'll retry this when Stelvio has improved further. (2023-04-17)
Henrik Juel: Stelvio 1.4 found nothing in 10 minutes
Maybe I was not patient enough, or maybe I should have set some parameters differently (2023-11-14)
comment
Keywords: Unique Proof Game, Anti-Pronkin (TT), Ceriani-Frolkin Theme (TT)
Genre: Retro
FEN: 6RR/6Pp/npk3qp/3q1n1p/1r6/bb1b1Nrr/PB1N1PBP/6K1
Input: A.Buchanan, 2015-06-24
Last update: Silvio Baier, 2023-11-14 more...
40 - P1384716
Michel Caillaud
Probleemblad 2015-2016
1. Preis
P1384716
(14+12) C+
BP in 26.0
1. Sf3 c5 2. Se5 c4 3. f3 c3 4. Kf2 cxb2 5. c4 Da5 6. Dc2 Kd8 7. Dg6 hxg6 8. c5 Th3 9. c6 Tg3 10. hxg3 Kc7 11. Th4 Kd6 12. Ta4 Dd8 13. c7 Sf6 14. cxd8=D Sd5 15. Da5 Sb6 16. d4 Kc7 17. Ld2 Kd8 18. Le1 Ke8 19. Sd2 Sd5 20. Tc1 b1=D 21. e4 Db6 22. Txc8+ Dd8 23. Tc6 Db6 24. Ld3 Db1 25. Lxb1 Sf6 26. Sd3 Sg8
play all play one stop play next play all
Moldenhauer: Computerprüfung: C+ Stelvio 1.11 00:24:57 Minuten. (hh:mm:ss)
Keine Lösung: BP 25.0, BP 25.5. (2023-05-01)
more ...
comment
Keywords: Unique Proof Game, Promotion (Dd)
Genre: Retro
Computer test: Stelvio 1.11
FEN: rn2kbn1/pp1pppp1/2R3p1/Q7/R2PP3/3N1PP1/P2N1KP1/1B2B3
Input: fs/hg, 2020-12-30
Last update: Silvio Baier, 2023-08-15 more...
41 - P1412978
Unto Heinonen
Probleemblad 2006
P1412978
(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 play one stop play next 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...
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The problems of this query have been registered by the following contributors:

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Reto (1)