Die Schwalbe

436 problem(s) found in 2905 milliseconds (displaying 100 problem(s)). [COMMENTDATE>=20200919 AND CPLUS 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+
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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 - 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
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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...
3 - 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
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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...
4 - 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+
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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...
5 - 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+
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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...
6 - 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+
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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...
7 - P0001550
Michel Caillaud
421 Europe Echecs 295 07/1983
A. Hazebrouck gewidmet
1. Preis
P0001550
(13+12) C+
BP in 35.5
1. h4 c5 2. h5 c4 3. Th4 c3 4. Tc4 b5 5. g4 b4 6. Lg2 b3 7. Lc6 bxa2 8. b4 a5 9. b5 a4 10. b6 a3 11. La4 Sc6 12. b7 d5 13. b8=D d4 14. Dd6 d3 15. Dg6 dxc2 16. d3 fxg6 17. Ld2 c1=L 18. Db3 c2 19. La5 Lh6 20. Sd2 c1=L 21. Sf1 Lcg5 22. f4 Kf7 23. 0-0-0 a1=L 24. fxg5 a2 25. gxh6 Kf6 26. Sh2 Kg5 27. Tf1 Lf6 28. Tff4 a1=L 29. Kb1 Lae5 30. d4 Lb7 31. dxe5 Dd2 32. exf6 Te8 33. f7 Sf6 34. Dd3 Sd7 35. Ld1 Sdb8 36. Sgf3+
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5 Frolkin-Ceriani-Umwandlungen: 4 schwarze Läufer und 1 weiße Dame! Eine der bahnbrechenden frühen KBPs.
Silvio Baier: Der wesentliche thematische Inhalt ist bereits nach 31,5 Zügen erreicht. Bis dahin ist es C+ (Euclide 0.98). (2010-08-04)
James Malcom: Is this fully C+ then? (2021-01-27)
Henrik Juel: No, only the first 31.5 moves are tested OK (2021-01-27)
James Malcom: No Henrik, as in is the entire problem testable. (2021-01-27)
Henrik Juel: I guess that testing the entire problem would take an unreasonably long time (2021-04-06)
A.Buchanan: It might be possible these days: the motivation for stopping at 31.5 is that the promotion theme had been demonstrated by then. But there’s still e.g. bSb8 as random impostor (2021-04-07)
Moldenhauer: Computerprüfung: C+ Stelvio 1.11 50:24:34 Stunden.(hh:mm:ss)
Keine Lösung: BP 34.5, BP 35.0. (2023-05-08)
Henrik Juel: Thanks for your patience, Moldenhauer; more than two days... (2023-05-08)
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...
8 - 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
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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...
9 - 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
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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...
10 - P0001577
Michel Caillaud
447 Europe Echecs 316 04/1985
2. Preis
P0001577
(14+11) C+
BP in 26,5
1. f4 h5 2. f5 h4 3. f6 h3 4. fxe7 hxg2 5. h4 g5 6. h5 g4 7. Th4 g3 8. Sh3 g1=L 9. Lg2 Le3 10. Lc6 g2 11. dxe3 g1=T+ 12. Kf2 Tg3 13. e4 Tb3 14. axb3 f5 15. Ta6 f4 16. La4 f3 17. Kg3 f2 18. Th6 f1=D 19. Dd6 Df7 20. Lf4 Dc4 21. bxc4 a5 22. Lb3 a4 23. Da6 a3 24. Ld6 a2 25. Sf4 axb1=S 26. La2 Sc3 27. bxc3
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Erstdarstellung einer Frolkin-Ceriani-Allumwandlung in einer eindeutigen KBP.
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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...
11 - 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
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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)
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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...
12 - 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
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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...
13 - 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+
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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)
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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...
14 - P0001637
Andrej N. Kornilow
Andrey Frolkin

506v Europe Echecs 364 04/1989
P0001637
(16+10) C+
BP in 13,5
2 solutions
1. Sc3 c5 2. Sd5 c4 3. Sxe7 c3 4. Sxg8 Dh4 5. Sh6 g5 6. Sxf7 Lg7 7. Se5 0-0 8. Sxd7 Lh8 9. Sxb8 Ld7 10. Sc6 Tc8 11. Sxa7 La4 12. Sb5 Tc6 13. Sa3 b5 14. Sb1
und
1. Sf3 c5 2. Se5 c4 3. Sxd7 c3 4. Sxb8 Ld7 5. Sc6 Tc8 6. Sxa7 La4 7. Sc6 b5 8. Sxe7 Tc6 9. Sxg8 Dh4 10. Sh6 g5 11. Sxf7 Lg7 12. Se5 0-0 13. Sf3 Lh8 14. Sg1
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Moldenhauer: Ergänzung: Stelvio 1.2. Keine Lösungen BP 12.5, BP 13.0.
Es ist wirklich eine Rarität dass es 2 komplette Lösungen gibt. (2023-05-20)
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...
15 - 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...
16 - 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...
17 - 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...
18 - 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...
19 - 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...
20 - 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...
21 - 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...
22 - 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...
23 - 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...
24 - 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...
25 - 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...
26 - 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...
27 - 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...
28 - 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...
29 - 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...
30 - 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...
31 - 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...
32 - 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+
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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...
33 - 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
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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...
34 - 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
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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...
35 - 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...
36 - 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
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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...
37 - 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...
38 - 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...
39 - 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...
40 - 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...
41 - 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
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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...
42 - 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
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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...
43 - 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...
44 - 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...
45 - 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
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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...
46 - 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...
47 - 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...
48 - 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...
49 - 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...
50 - 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...
51 - 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...
52 - 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...
53 - 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...
54 - 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...
55 - 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...
56 - 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...
57 - 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...
58 - 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...
59 - 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...
60 - 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...
61 - 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...
62 - 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...
63 - 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...
64 - P1000475
Michel Caillaud
P0056 StrateGems 10 04-06/2000
4. Preis
P1000475
(15+15) C+
BP in 18,5
1. a4 e5 2. a5 e4 3. Ta4 e3 4. Te4+ Se7 5. b4 Sbc6 6. Lb2 Sd4 7. Dc1 Sxe2 8. Lf6 Sg3 9. d4 Sgf5 10. Ke2 Sh6 11. Kf3 Shg8 12. Kg4 e2 13. Dh6 e1=S 14. Se2 Sd3 15. Sc1 Sc5 16. Ld3 Sa6 17. The1 Sb8 18. T1e3 a6 19. Txe7+
play all play one stop play next play all
Pronkin-Thema mit Platzwechsel: Sg8 wird auf e7 geschlagen, sSb8 wandert nach g8, umgewandelter sSe1 geht nach b8. Zyklischer Platzwechsel von sSb8, sSg8 und sBe7.
Henrik Juel: Partial testing with Natch 3.1
18.0 moves with sDTLSPe7 and wTd5; only sSe7 works (2018-12-14)
Mario Richter: @Henrik: Did you mean "... and wTe4"? (2018-12-15)
Henrik Juel: Yes, I did, Mario (2018-12-16)
more ...
comment
Keywords: Unique Proof Game, Pronkin Theme (s), Interchange
Genre: Retro
Computer test: Computerprüfung: C+ Stelvio 1.2 04:02:35 Stunden. (hh:mm:ss) Keine Lösung BP 17.5, BP 18.0. Checked by Stelvio 1.2 in about 5 hours.
FEN: rnbqkbnr/1pppRppp/p4B1Q/P7/1P1P2K1/3BR3/2P2PPP/1NN5
Reprints: (7) Quartz 21 07-09/2002
feenschach 153, p. 201, 10-12/2003
Input: Gerd Wilts, 2000-08-01
Last update: A.Buchanan, 2023-05-30 more...
65 - P1000488
Thierry Le Gleuher
P0030 StrateGems 04-06/1999
Sam Loyd gewidmet
3. Preis
P1000488
(14+14) C+
BP in 25,5
1. d4 g5 2. Lf4 g4 3. Kd2 g3 4. hxg3 Sc6 5. Th6 Se5 6. Tb6 Sf3+ 7. exf3 axb6 8. Lc4 Ta3 9. Df1 Tc3 10. Sa3 h5 11. Te1 h4 12. Te6 h3 13. Tc6 dxc6 14. Ke2 Lf5 15. Le6 Da8 16. Lc8 e6 17. d5 Se7 18. d6 Sg6 19. d7+ Ke7 20. d8=T Th4 21. Td1 Sh8 22. Ta1 Kd8 23. Sb1 La3 24. Lc1 Tb4 25. Ld7 Le4 26. Dd1
play all play one stop play next play all
Hervorragend: Pronkin-Thema mit dem völlig eingeschlossenen wTa1, Switchback von Sb1, Lc1 und Dd1. Ein Rätsel im Geiste von Sam Loyd.
Henrik Juel: Natch 3.1 did nothing for an hour (2018-12-13)
Moldenhauer: Computerprüfung: C+ Stelvio 1.0 © Reto Aschwanden
33 Minuten, 1 Lösung, Notation OK.
Stelvio Histogramme/Strategien 40, vor der Lösung wegen der Lösezeit
mit Stelvio berechnet. (2023-02-08)
comment
Keywords: Unique Proof Game, Pronkin Theme (T), Switchback (SLD)
Genre: Retro
Computer test: Stelvio 1.0
FEN: q2k3n/1ppB1p2/1pp1p3/8/1r2b3/b1r2PPp/PPP1KPP1/RNBQ2N1
Reprints: feenschach 153 10-12/2003
A) Quartz 23 01-03/2004
H57 FIDE Album 1998-2000 2007
Input: Gerd Wilts, 2000-08-01
Last update: Silvio Baier, 2023-03-02 more...
66 - P1000529
Göran Forslund
StrateGems 1998
Lob
Thematurnier
P1000529
(15+13) C+
KBP?
1. d3 Sf6 2. Lh6 gxh6 3. g4 Lg7 4. g5 Sg4 5. g6 Lc3 6. bxc3 0-0 7. g7 h5 8. gxf8=L Kh8 9. Lh6 Dg8 10. Le3 Dg5 11. Lxa7 Dc5 12. Lb6 Ta6 13. La5 Tg6 14. Lb4 Tg8 15. La3 Tf8 16. Lc1 Kg8
play all play one stop play next play all
Henrik Juel: Natch 3.1 produced nothing in more than 3 hours (2018-12-12)
Moldenhauer: Computerprüfung: C+ Stelvio 1.0 01:02:15 Stunden.
Keine Lösung: BP 15.0, BP 15.5. Notation OK. (2023-02-18)
comment
Keywords: Unique Proof Game, Promotion (L), Castling, Pronkin Theme
Genre: Retro
Computer test: Stelvio 1.0
FEN: 1nb2rk1/1ppppp1p/8/2q4p/6n1/2PP4/P1P1PP1P/RNBQKBNR
Input: Gerd Wilts, 2000-08-01
Last update: Silvio Baier, 2023-03-02 more...
67 - P1000543
Thierry Le Gleuher
P0008v StrateGems Vol.1 10-12/1998
3. ehrende Erwähnung
P1000543
(14+15) C+
BP in 21,5
1. a4 f5 2. a5 Sf6 3. a6 bxa6 4. Ta3 Lb7 5. Tg3 Lf3 6. d3 Sc6 7. Lf4 Tb8 8. Ld6 exd6 9. gxf3 De7 10. Lh3 Df7 11. Lg4 Le7 12. Lh5 Ld8 13. Lg6 h5 14. Lh7 Da2 15. Lg8 Tb3 16. Lc4 d5 17. Dd2 Kf7 18. Db4 Te8 19. Db8 Te3 20. Lb5 Se5 21. Lc6 Se4 22. Lb7
play all play one stop play next play all
Lange, 10zügige Wanderung des wLf1.
Henrik Juel: Natch 3.1 did absolutely nothing in an hour (2018-12-12)
Moldenhauer: Computerprüfung: C+ Stelvio 1.11 07:04:17 Stunden. (hh:mm:ss)
Keine Lösung: BP 20.5, BP 21.0. (2023-03-16)
comment
Keywords: Unique Proof Game, Promenade (L)
Genre: Retro
Computer test: Stelvio 1.11
FEN: 1Q1b4/pBpp1kp1/p7/3pnp1p/4n3/1r1PrPR1/qPP1PP1P/1N2K1NR
Input: Gerd Wilts, 2000-08-01
Last update: Silvio Baier, 2023-03-20 more...
68 - P1000597
Satoshi Hashimoto
R065 Probleemblad 09/1999
P1000597
(13+14) C+
BP in genau 9,5
1. a4 d5 2. Ta3 Lg4 3. Th3 e6 4. Txh7 Df6 5. Txg7 Txh2 6. Th7 Txg2 7. T1h3 Dxb2 8. Ta3 f6 9. Ta1 Da2 10. Th1
play all play one stop play next play all
paul: See P1000623 as a version. (2020-12-07)
comment
Keywords: Unique Proof Game, Interchange (TT)
Genre: Retro
Computer test: (Natch 1.3 Copyright (C) 1997-1999 Pascal Wassong)
FEN: rn2kbn1/ppp5/4pp2/3p4/P5b1/8/q1PPPPr1/RNBQKBNR
Input: Gerd Wilts, 2000-08-01
Last update: Gerd Wilts, 2004-08-26 more...
69 - P1000623
Satoshi Hashimoto
R065v Probleemblad 01/2000
P1000623
(14+14) C+
BP in 10.0
1. h4 e6 2. Th3 Lc5 3. Ta3 Lb6 4. Txa7 c5 5. Txb7 Txa2 6. Ta7 Txb2 7. T1a3 Dc7 8. Th3 Kd8 9. Th1 Dh2 10. Ta1 d6
play all play one stop play next play all
paul: Version of P1000597. (2020-12-07)
comment
Keywords: Unique Proof Game, Interchange (TT)
Genre: Retro
Computer test: (Natch 1.3 Copyright (C) 1997-1999 Pascal Wassong)
FEN: 1nbk2nr/5ppp/1b1pp3/2p5/7P/8/1rPPPPPq/RNBQKBNR
Reprints: 16 64 Proof Games 2012
Input: Gerd Wilts, 2000-08-01
Last update: A.Buchanan, 2020-12-08 more...
70 - 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...
71 - 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...
72 - 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...
73 - 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. Oder auch Stelvio 2.1 in 25min.
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: Reto, 2024-03-10 more...
74 - 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...
75 - P1000740
Michel Caillaud
R095 Probleemblad 07-08/2000
P1000740
(16+12) C+
BP in 16,0
1. b4 Sh6 2. b5 Sf5 3. b6 h6 4. bxa7 Th7 5. axb8=L Ta6 6. d4 Te6 7. d5 b6 8. d6 Lb7 9. dxe7 Lf3 10. exf8=L Lh5 11. L8a3 c5 12. L1f4 Ke7 13. Lbd6+ Kf6 14. Lf8 Da8 15. Lb8 Kg5 16. Lc1 Kg4
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Zyklischer Platzwechsel der 3 wLL.
paul: The problem obtained 3rd Prize in tourney. Reprints: H34, FIDE Album 1998-2000, H2 p.266, The Problemist Nov. 2007, p.187, feenschach 170 Nov. 2007. (2021-10-05)
more ...
comment
Keywords: Unique Proof Game, Interchange (LLL), Non-standard material (LL)
Genre: Retro
Computer test: Resolution time : 1.98 s., Natch 2.3 Copyright (C) 1997,98,99,2001,2002,2003,2004 Pascal Wassong
FEN: qB3B2/3p1ppr/1p2r2p/2p2n1b/6k1/8/P1P1PPPP/RNBQKBNR
Input: Gerd Wilts, 2000-10-02
Last update: A.Buchanan, 2021-10-05 more...
76 - P1000946
Thierry Le Gleuher
v StrateGems 6 04-06/1999
Lob TT
P1000946
(15+15) C+
BP in 25,5
1. Sc3 Sf6 2. Se4 Sd5 3. Sf6 gxf6 4. h4 Lh6 5. Th3 Kf8 6. Tb3 Kg7 7. Tb6 Dg8 8. b4 Kf8 9. Lb2 Dg3 10. Le5 Db3 11. axb3 a6 12. Ta5 Ta7 13. Tab5 a5 14. e3 a4 15. Le2 a3 16. Lh5 a2 17. Dg4 a1=D+ 18. Ke2 Dd4 19. De6 Dg4+ 20. Kd3 Dg8 21. g4 Kg7 22. g5 Dd8 23. g6 Kf8 24. g7+ Ke8 25. g8=S Lf8 26. Sh6
play all play one stop play next play all
Pronkin-Thema mit der eingeschlossenen sD. Ein sS könnte a1 nicht mehr verlassen. Ein sT könnte h8 nicht mehr erreichen, und von a8 kann kein sT auf b3 geschlagen werden, da dazu der sBa7 zuerst nach a5 müsste und damit der wTa1 nicht mehr ohne Schlag des sBa nach b5 kann.
paul: Correction of P1000530 (2010-05-05)
Moldenhauer: Computerprüfung: C+ Stelvio 1.0 19:31:47 Stunden.
Keine Lösung: BP 24.5, BP 25.0. (2023-02-15)
comment
Keywords: Unique Proof Game, Phoenix (S), Pronkin Theme (d), Pure Round Trip (k), Tempo Loss (b1)
Genre: Retro
Computer test: Stelvio 1.0
FEN: 1nbqkb1r/rppppp1p/1R2Qp1N/1R1nB2B/1P5P/1P1KP3/2PP1P2/6N1
Reprints: H33 FIDE Album Annexe 1998-2000 2009
Input: Gerd Wilts, 2000-10-15
Last update: Silvio Baier, 2023-03-02 more...
77 - P1000973
Unto Heinonen
10919 Die Schwalbe 185 10/2000
3. ehrende Erwähnung
P1000973
(16+13) C+
BP in 21,5
1. d3 Sh6 2. Lxh6 e6 3. e3 La3 4. Dg4 0-0 5. f3 g6 6. Lxf8 f6 7. Lc5 d6 8. Kf2 Ld7 9. Kg3 La4 10. Kh4 c6 11. g3 Da5 12. Lh3 De1 13. c3 Ld1 14. b3 Lc1 15. Sa3 Sa6 16. Sc2 Sb4 17. a3 Sa2 18. Db4 a6 19. Lg4 Ta7 20. Lxa7 h6 21. Ld4 b6 22. h3
play all play one stop play next play all
Alle Bauern (weiß und schwarz) machen einen einfachen Schritt.
Teppo Mänttä: reprint: H49 FIDE-Album 1998-2000 (Aachen 2007). (2021-05-08)
more ...
comment
Keywords: Unique Proof Game, Ornament
Genre: Retro
Computer test: Natch 3.1 (1 min.)
FEN: 6k1/8/pppppppp/8/1Q1B2BK/PPPPPPPP/n1N5/R1bbq1NR
Input: Gerd Wilts, 2000-10-29
Last update: Alfred Pfeiffer, 2018-12-20 more...
78 - P1001055
Satoshi Hashimoto
11046 Die Schwalbe 187 02/2001
P1001055
(14+15) C+
BP in 17,5
1. Sc3 b5 2. Sa4 b4 3. c3 b3 4. Dc2 bxc2 5. Tb1 cxb1=D 6. Sf3 De4 7. d3 e6 8. Le3 Df6 9. Sd2 Dff3 10. exf3 Lc5 11. Le2 d6 12. 0-0 Kd7 13. Ta1 Kc6 14. Sb1 Kb5 15. Lc1 Le3 16. Kf1 c5 17. Ke1 Sc6 18. Lf1
play all play one stop play next play all
Henrik Juel: Natch 3.3 just needed less than a second to test this proof game (2023-06-12)
comment
Keywords: Unique Proof Game, Ceriani-Frolkin Theme (d), Interchange (T), Castling, Switchback (LL)
Genre: Retro
Computer test: Resolution time : 58.79 s., Natch 2.3 Copyright (C) 1997,98,99,2001,2002,2003,2004 Pascal Wassong
FEN: r1b3nr/p4ppp/2npp3/1kp5/N3q3/2PPbP2/PP3PPP/RNB1KB2
Input: Gerd Wilts, 2001-02-11
Last update: Gerd Wilts, 2005-12-30 more...
79 - P1001099
Satoshi Hashimoto
R123 Probleemblad 01/2001
P1001099
(12+16) C+
BP in 22,5
1. h4 a5 2. Th3 a4 3. Tb3 axb3 4. a4 Ta6 5. a5 Tf6 6. a6 h5 7. a7 Thh6 8. Ta6 Thg6 9. Tc6 dxc6 10. a8=T Dd4 11. Ta1 Da7 12. d4 Lg4 13. d5 Lxe2 14. d6 Lb5 15. Dg4 hxg4 16. h5 Tf3 17. h6 Sf6 18. h7 Sd5 19. h8=T f6 20. d7+ Kf7 21. d8=D Sb6 22. Dd1 Ke8 23. Th1
play all play one stop play next play all
Henrik Juel: C+ by Euclide 1.01 also, but in just 71 seconds (2016-06-16)
Reto: C+ also by Stelvio 2.0 in under 10sec (2024-01-07)
more ...
comment
Keywords: Unique Proof Game, Pronkin Theme (DTT), Homebase (W)
Genre: Retro
Computer test: Resolution time : 48 mn 15.33 s., Natch 2.3 Copyright (C) 1997,98,99,2001,2002,2003,2004 Pascal Wassong
FEN: 1n2kb2/qpp1p1p1/1np2pr1/1b6/6p1/1p3r2/1PP2PP1/RNBQKBNR
Input: Gerd Wilts, 2001-02-11
Last update: Alfred Pfeiffer, 2016-06-16 more...
80 - P1001146
Satoshi Hashimoto
(13) Probleemblad 03/1999
P1001146
(14+16) C+
BP in genau 6,5
1. e3 Sf6 2. e4 Sxe4 3. Sa3 Sc3 4. Tb1 Sxb1 5. Sb5 Sa3 6. Sc3 Sc4 7. Sb1
play all play one stop play next play all
Mario Richter: brauchen wir wirklich zwei verschiedene Keywords - hier "Tempoverlustmanöver", bei z.B. P1007491 hingegen "Loss of tempo"? (2018-10-21)
Henrik Juel: Good point, Mario
Other things in the never-ending Keyword discussion include:
Tempoverlustmanöver is currently called the same in english and french, and has no definitions
Loss of tempo (Tempoverlust in german) is defined as
'With White to play, a sequence of moves to reach the same position with Black to play. (Help game, abbr .: TV)'
which makes little sense in proof games
In this problem [Pe2] goes e2-e3-e4 ('wasting' a move)
In P1007491 [Pc2] similarly goes c2-c3-c4-... and [Lc8] goes (among other things) c8-b7-a6-c8 ('triangulation') (2018-10-21)
Henrik Juel: There are many solutions in 6.0 moves, like
1.Sb1-c3 Sg8-f6 2.Pe2-e4 Sf6xe4 3.Sc3-a4 Se4-c3 4.Ra1-b1 Sc3xb1 5.Sa4-c3 Sb1-a3 6.Sc3-b1 Sa3-c4
Correction: Change the stipulation to
BP in exactly 6.5 (2024-03-10)
comment
Keywords: Unique Proof Game, Pure Round Trip (S), Homebase (w), Tempo Losing Manouevre (weP)
Genre: Retro
Computer test: (Natch 1.3 Copyright (C) 1997-1999 Pascal Wassong)
FEN: rnbqkb1r/pppppppp/8/8/2n5/8/PPPP1PPP/1NBQKBNR
Reprints: (2) Schweizerische Schachzeitung 05/2005
Input: Gerd Wilts, 2001-02-11
Last update: A.Buchanan, 2024-03-11 more...
81 - P1001254
Andrey Frolkin
11180 Die Schwalbe 189 06/2001
P1001254
(10+15) C+
BP in 24.0
1. e4 d5 2. Ke2 Lg4+ 3. Kd3 dxe4++ 4. Kc4 Dxd2 5. h4 Dg5 6. hxg5 Sd7 7. Th6 Tb8 8. Te6 fxe6 9. Kb5 Kf7 10. c4 Kg6 11. c5 Kh5 12. c6 bxc6++ 13. Ka6 Tb5 14. g6 Le2 15. Lh6 gxh6 16. a4 Lg7 17. a5 Txa5++ 18. Kb7 Lc3 19. Kc8 Sb6+ 20. Kd8 Sc8 21. Ke8 Sf6++ 22. Kf7 Td8 23. g7 Se8 24. Kg8 Sf6#
play all play one stop play next play all
5 Doppelschachs
paul: Improvement of P1000732. (2018-03-21)
Henrik Juel: Euclide 1.01 ran for more than five hours without any interesting output (2018-03-22)
Reto: With Version 1.15, Stelvio only requires 5 seconds (2023-04-02)
more ...
comment
Keywords: Unique Proof Game
Genre: Retro
Computer test: Moldenhauer: Computerprüfung: C+ Stelvio 1.11 00:10:09 Minuten. (hh:mm:ss) Keine Lösung: BP 23.0, BP 23.5.
FEN: 2nr2K1/p1p1p1Pp/2p1pn1p/r6k/4p3/2b5/1P2bPP1/RN1Q1BN1
Input: Gerd Wilts, 2001-08-29
Last update: A.Buchanan, 2023-04-01 more...
82 - P1001272
Jasper van Atten
Probleemblad 1990-1991
2. Preis
P1001272
(14+13) C+
BP in 24,0
1. d4 g5 2. d5 g4 3. d6 g3 4. dxe7 d5 5. e4 Kd7 6. e8=T d4 7. Te6 d3 8. Ta6 bxa6 9. e5 Kc6 10. e6 Sd7 11. e7 Tb8 12. e8=D Tb5 13. De3 Sc5 14. Dh5 Sb3 15. Db6+ cxb6 16. Le3 d2+ 17. Ke2 Lb4 18. Ld4 d1=L+ 19. Kd3 Lf3 20. gxf3 g2 21. Se2 g1=S 22. Sg3 Se2 23. Tg1 Sc3 24. bxc3 Lf5+
play all play one stop play next play all
Cerian-Frolkin-Thema, Allumwandlung (DTls)
more ...
comment
Keywords: Ceriani-Frolkin Theme (DTls), Unique Proof Game, Allumwandlung
Genre: Retro
Computer test: Resolution time : 46 mn 50.33 s., Natch 2.3 Copyright (C) 1997,98,99,2001,2002,2003,2004 Pascal Wassong
FEN: 3q2nr/p4p1p/ppk5/1r3b1Q/1b1B4/1nPK1PN1/P1P2P1P/RN3BR1
Reprints: feenschach 137 08-09/2000
(G) Quartz 26 10-12/2004
Input: Gerd Wilts, 2001-08-29
Last update: A.Buchanan, 2022-06-23 more...
83 - P1001275
Unto Heinonen
The Problemist 1991-1992
2. Preis
P1001275
(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
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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...
84 - P1003967
Alexandre Leroux
R49 Problemesis 26 04/2002
Lob
P1003967
(16+16) C+
BP in 24,0
1. e4 a5 2. La6 Sc6 3. c4 Sd4 4. Da4 Se2 5. d4 h5 6. Sd2 Th6 7. Sf1 Tg6 8. Lh6 e5 9. f4 Lc5 10. Sf3 Sg1 11. 0-0-0 Dh4 12. Td2 Df2 13. h4 Ke7 14. Th3 d5 15. S3h2 Lg4 16. Tb3 Ld1 17. Tb6 Tg3 18. b4 g5 19. Tg6 f5 20. Tg7+ Kf6 21. Dd7 b5 22. a4 Ta3 23. g4 Lb6 24. Sg3 c5
play all play one stop play next play all
Henrik Juel: Natch 3.1 produced nothing in some 8 hours (2018-12-16)
Moldenhauer: Computerprüfung: C+ Stelvio 1.11 3 Sekunden.
Keine Lösung: BP 23.0, BP 23.5. (2023-04-02)
comment
Keywords: Unique Proof Game, Ornament, Capture-free
Genre: Retro
Computer test: Stelvio 1.2, 5sec
FEN: r5n1/3Q2R1/Bb3k1B/pppppppp/PPPPPPPP/r5N1/3R1q1N/2Kb2n1
Input: Gerd Wilts, 2002-03-31
Last update: Reto, 2023-05-20 more...
85 - P1003973
Michel Caillaud
R55 Problemesis 26 04/2002
2. Preis
P1003973
(16+11) C+
BP in 18,0
1. d4 c5 2. d5 Db6 3. Dd4 Db3 4. axb3 f5 5. Ta6 f4 6. Tc6 f3 7. Sxf3 e5 8. Sxe5 a5 9. Sxd7 a4 10. bxa4 h5 11. b3 h4 12. Lb2 h3 13. Dh4 Sa6 14. f4 Sb4 15. Kf2 Sd3+ 16. Kg1 Se5 17. Sb8 Sd7 18. Sa6 Sb8
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Rundlauf des sSb8 in 6 Zügen.
Henrik Juel: Natch 3.1 found the solution quickly, but did not finish in more than an hour (2018-12-16)
Moldenhauer: Computerprüfung: C+ Stelvio 1.0 nach nur 1 Sekunde. (2023-02-09)
Henrik Juel: and no solution in 17.5 moves, so C++ Stelvio 1.0 (2023-02-09)
Henrik Juel: Fine motivation for the round trip: making room for white Sd7-b8-a6 (2023-02-09)
comment
Keywords: Unique Proof Game, Pure Round Trip (s)
Genre: Retro
Computer test: Stelvio 1.0
FEN: rnb1kbnr/1p4p1/N1R5/2pP4/P4P1Q/1P5p/1BP1P1PP/1N3BKR
Reprints: feenschach 153 10-12/2003
(H) Quartz 28 07-09/2005
Input: Gerd Wilts, 2002-03-31
Last update: Silvio Baier, 2023-03-02 more...
86 - P1003984
Kostas Prentos
R0097 StrateGems 18 04-06/2002
2. Lob
P1003984
(11+12) C+
BP in 17,0
1. d4 c6 2. Dd3 Db6 3. Dg6 Db3 4. axb3 hxg6 5. Ta6 Th3 6. Tb6 Tg3 7. hxg3 axb6 8. Th7 Ta2 9. Lh6 gxh6 10. e3 Lg7 11. La6 Le5 12. c4 Ld6 13. Sc3 La3 14. bxa3 Txf2 15. Sge2 d5 16. Kd2 Lh3 17. gxh3 bxa6
play all play one stop play next play all
4mal Überkreuzschlag (wBBa2b2 und g2h2, sBa7b7 und g7h7).
paul: The first 16.5 moves are unique (Euclide 0.96) (2010-07-05)
Henrik Juel: Natch 3.1 did not even find the solution in an hour (2018-12-16)
Moldenhauer: Computerprüfung: nachrichtlich C+ Stelvio 1.6 nach ca. 520 Std.
Natch 3.3 hat hier noch einen klaren Vorteil.
Stelvio wird ja weiter verbessert, wie ich bemerkt habe. (2023-10-02)
more ...
comment
Keywords: Unique Proof Game, Cross-capture (4)
Genre: Retro
Computer test: KP: C+ Natch 3.3 (24 hours 32 min) I stopped Stelvio 1.0 after 93 hours of testing
FEN: 1n2k1n1/4pp1R/ppp3pp/3p4/2PP4/PPN1P1PP/3KNr2/8
Reprints: (89) Die Schwalbe 250A 08/2011
Input: Gerd Wilts, 2002-04-05
Last update: A.Buchanan, 2023-03-20 more...
87 - P1003986
Dan Meinking
R0099 StrateGems 18 04-06/2002
5.-7. Preis ex aequo
P1003986
(15+15) C+
BP in 20,0
1. g4 h5 2. Lg2 Th6 3. Le4 Td6 4. Lh7 g6 5. h4 Lg7 6. Th3 Ld4 7. Ta3 Lb6 8. c3 c5 9. Da4 Dc7 10. Dd4 Dc6 11. Dh8 Dh1 12. f3 f6 13. Kf2 Kf7 14. Sh3 Sh6 15. Dxc8 Dxc1 16. Dc6 Dc2 17. Ke1 Df5 18. De4 Sc6 19. Kd1 Th8 20. Kc1 Ke8
play all play one stop play next play all
Henrik Juel: Natch 3.1 did not find the solution in half an hour (2018-12-16)
more ...
comment
Keywords: Unique Proof Game
Genre: Retro
Computer test: Computerprüfung: C+ Stelvio 1.0 01:37:02 Stunde. Keine Lösung: BP 19.0, BP 19.5.
FEN: 5k1r/pp1pp2B/1bnr1ppn/2p2q1p/4Q1PP/R1P2P1N/PP1PP3/RNK5
Reprints: feenschach 153, p. 209, 10-12/2003
Input: Gerd Wilts, 2002-04-05
Last update: A.Buchanan, 2023-03-01 more...
88 - P1004001
Michel Caillaud
R0093 StrateGems 17 01-03/2002
Gianni Donati gewidmet
2.-4. Preis ex aequo
P1004001
(16+16) C+
BP in 20,5
1. Sc3 e5 2. Sd5 Df6 3. Se7 d5 4. e4 Lf5 5. De2 Sd7 6. Da6 Td8 7. De6 Sb6 8. Dc8 Sh6 9. Sc6 Lb4 10. Da8 Lc3 11. Sb8 Td6 12. Lb5+ Kd8 13. Ld7 Tc6 14. Lc8 Tc5 15. Sd7 Dc6 16. Sf6 Te8 17. Sg4 Te6 18. Se3 Tg6 19. Sc4 Tg4 20. Sa3 Lg6 21. Sb1
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Spektakuläre Wanderung des wSb1 über e7 nach b8 und zurück zwecks Schachschutz.
Moldenhauer: Computerprüfung: C+ Stelvio 1.0 33:18 Minuten.
Keine Lösung BP 20.0, BP 19.5.
Bitte Notation richtigstellen: 19.Sc4 Tg5 (2023-02-13)
comment
Keywords: Unique Proof Game, Promenade (S), Capture-free
Genre: Retro
Computer test: Stelvio 1.0
FEN: Q1Bk4/ppp2ppp/1nq3bn/2rpp1r1/4P3/2b5/PPPP1PPP/RNB1K1NR
Reprints: feenschach 153 10-12/2003
Input: Gerd Wilts, 2002-04-05
Last update: Silvio Baier, 2023-03-02 more...
89 - P1004002
Noam D. Elkies
R0094 StrateGems 17 01-03/2002
Richard Stanley gewidmet
P1004002
(14+15) C+
BP in 23.5
1. Sc3 d5 2. Sxd5 h6 3. Se3 Dd3 4. Tb1 Dh7 5. Sf5 a5 6. e3 a4 7. Dh5 a3 8. Ke2 axb2 9. a4 Ta6 10. a5 Tg6 11. a6 c5 12. a7 c4 13. a8=T c3 14. Ta6 cxd2 15. Tb6 d1=T 16. Ld2 Sf6 17. La5 Td8 18. c3 Sbd7 19. Kd3 Dg8 20. Kd4 Th7 21. Lb5 Dh8 22. La4 Sg8 23. Kd5 f6 24. Ke6= patt
play all play one stop play next play all
James Malcom: Is this the record for the longest PG ending in stalemate? (2020-11-13)
A.Buchanan: There are no shorter ones in PDB without a promotion ("=" can mean promotion or draw). Coming at 41.5 by Guus Rol there is P1011937, ending in draw by 3Rep. (2020-11-13)
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comment
Keywords: Unique Proof Game, Non-standard material (Tt)
Genre: Retro
Computer test: Natch 3.1 (15 min.)
FEN: 2brkbnq/1p1np1pr/1R2Kprp/B4N1Q/B7/2P1P3/1p3PPP/1R4NR
Input: Gerd Wilts, 2002-04-05
Last update: James Malcom, 2021-11-09 more...
90 - P1004040
Michel Caillaud
3654 Phénix 95 04/2001
P1004040
(13+13) C+
BP in 15,0
1. c4 e6 2. Db3 Ke7 3. Db6 axb6 4. d4 Ta3 5. Lh6 Th3 6. gxh3 Kd6 7. Lg2 Se7 8. Lc6 dxc6 9. d5 Kc5 10. dxc6 Kb4 11. cxb7 c5 12. a4 Sec6 13. Ta3 De7 14. Tb3+ Kxb3 15. Lc1 Kf2
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Überraschendes Tempoverlustmanöver Lc1-h6-Lc1.
paul: 15...Kc2 (2021-09-27)
comment
Keywords: Unique Proof Game, Tempo Loss
Genre: Retro
Computer test: Resolution time : 19.56 s., Natch 2.3 Copyright (C) 1997,98,99,2001,2002,2003,2004 Pascal Wassong
FEN: 1nb2b1r/1P2qppp/1pn1p3/2p5/P1P5/7P/1Pk1PP1P/1NB1K1NR
Input: Gerd Wilts, 2002-04-05
Last update: Gerd Wilts, 2005-12-26 more...
91 - 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
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7zügiges Tempoverlustmanöver der wD, die kompliziert auf dem Königsflügel freigeschleust werden muss.
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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...
92 - P1004087
Reto Aschwanden
8618 feenschach 146 03-05/2002
2. Preis
P1004087
(14+14) C+
BP in 18,5
1. a4 Sa6 2. Ta3 Sc5 3. Td3 a6 4. Td6 cxd6 5. h4 Da5 6. h5 b6 7. h6 Lb7 8. hxg7 Ld5 9. Th6 Sb7 10. Tf6 exf6 11. g4 Se7 12. g8=T Sg6 13. Tg7 Ke7 14. Txh7 Ke6 15. Th1 Th2 16. g5 Tg2 17. Th3 Lh6 18. Ta3 Th8 19. Ta1
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Zweimal Pronkin-Thema: beide wTT werden auf d6 bzw. f6 geschlagen, der aus der Umwandlung auf g8 entstandene Turm geht erst nach h1, dann nach a1 zurück.
Vladimir Rey: Update: 2. Preis (source: feenschach 182 2010) (2022-08-04)
comment
Keywords: Unique Proof Game, Pronkin Theme (T)
Genre: Retro
Computer test: Resolution time: Natch 3.3: 7sec, Euclide 1.11: 2sec, Stelvio 1.14: 3sec
FEN: 7r/1n1p1p2/pp1pkpnb/q2b2P1/P7/8/1PPPPPr1/RNBQKBN1
Reprints: idee & form 80 10/2003
Input: Gerd Wilts, 2002-05-10
Last update: Reto, 2023-03-22 more...
93 - P1004110
Olli Heimo
Retros mailing list 01/05/1997
1. ehrende Erwähnung Retro List Quick Composition Tourney
P1004110
(14+12) C+
BP in 25.0
1. g4 a5 2. Lg2 Ta6 3. Kf1 Th6 4. Lc6 bxc6 5. Kg2 La6 6. Kf3 Ld3 7. Ke3 Sa6 8. Kd4 Db8 9. Kc3 Db3+ 10. Kxb3 Kd8 11. Ka4 Kc8 12. b3 Kb7 13. Lb2 Kb6 14. Lc3 Kc5 15. Kxa5 Lg6 16. Kxa6 Kd5 17. Kb7 Ke4 18. Kc8 Kf4 19. Kd8 Kg5 20. Ke8 Kh4 21. Sf3+ Kh3 22. Kxf8 Kg2 23. Se1+ Kxh1 24. Ke8 Kg1 25. Kd8 Kf1
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Eingesandt unter dem Pseudonym "L. Strangebeast (aka Olli Heimonen)
Olli Heimo: Unto Heinonen has nothing to do with this problem. It was a quick composition tourney arranged by Ian Tinigodad and pseudonyms were allowed as certainly many of us noticed that Ian Tinigodad was a pseudonym and an anagram. Afterwards the correct names were picked up but for some unknown reason there is also Unto's name. Perhaps he has never seen the problem. Please remove his name. (2010-05-24)
Henrik Juel: Ian Tinigonad was an anagrammatic pseudonym for Gianni Donati, of course. (2010-05-28)
Moldenhauer: Computerprüfung: C+ Stelvio 1.0 05:18 Minuten.
Keine Lösung BP 24.0 und BP 24.5.
Notation ergänzen: 25.Kd8 Kf1 (2023-02-11)
comment
Keywords: Unique Proof Game
Genre: Retro
Computer test: Stelvio 1.0
FEN: 3K2nr/2pppppp/2p3br/8/6P1/1PB5/P1PPPP1P/RN1QNk2
Input: Gerd Wilts, 2002-06-09
Last update: Silvio Baier, 2023-03-02 more...
94 - P1004175
Rustam Ubaidullajew
11587 Die Schwalbe 196 08/2002
2. Preis
P1004175
(14+16) C+
BP in 23,0
1. a4 g6 2. Ta3 Lg7 3. Tf3 Lxb2 4. Sa3 La1 5. Lb2 h5 6. Lg7 Th6 7. Lf8 Lh8 8. Da1 b5 9. Dg7 Lb7 10. Dh7 La1 11. Tf6 Lxg2 12. Sf3 Sa6 13. Tg1 Lh1 14. Lh3 Db8 15. Lf5 Db6 16. h3 0-0-0 17. Sh2 La8 18. Kf1 Kb7 19. Kg2 Sc5 20. Kf3 Ka6+ 21. Ke3 Lh1 22. Tg3 Ta8 23. Tf3 Sb7+
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Pendelmanöver der sLL.
Moldenhauer: Computerprüfung: C+ Euclide 1.11 in 9 Std. 5 Min. 37 Sek.
Notation OK. Nur eine Lösung! Keine Lösung in BP22.0 und BP 22.5. (2022-12-23)
comment
Keywords: Unique Proof Game, Pendulum (ll x2 x2)
Genre: Retro
Computer test: Stelvio 1.2, 1:40min
FEN: r4Bn1/pnpppp1Q/kq3Rpr/1p3B1p/P7/N3KR1P/2PPPP1N/b6b
Reprints: 264 Shakhmatnaya Kompozitsiya 47 2003
feenschach 161 09-11/2005
Input: Gerd Wilts, 2002-08-27
Last update: Reto, 2023-05-13 more...
95 - P1004186
Ivan Denkovski
Gligor Denkovski

PCCC Meeting 08/2002
Spezielle ehrende Erwähnung
Champagner Turnier
P1004186
(13+12) C+
BP in 20,0
1. h4 d5 2. Th3 d4 3. Te3 dxe3 4. Sc3 Dd3 5. exd3 Lh3 6. Df3 e2 7. g4 exf1=T+ 8. Ke2 Txc1 9. Dg3 Tf1 10. Te1 h5 11. Kd1 Th6 12. Kc1 Te6 13. Kb1 Te2 14. Ka1 e6 15. Tb1 Lc5 16. Sd1 Le3 17. fxe3 Tf5 18. gxf5 g5 19. fxe6 Lf5 20. De1 g4
play all play one stop play next play all
The thematic elements are the Zepler-Turton manoeuvres with wKa1 and wRb1 on orthogonal line and wPe6 and bBf5 on diagonal line. But other elements of the rich solution (Ceriani-Frolkin,...) make the theme appear not so clear as in the prized problems. (MC)
Henrik Juel: Natch 3.1 found the solution in minutes, but was still searching for cooks after two hours (2018-12-16)
Moldenhauer: Computerprüfung: Natch 3.3 löst wie oben (Stellung 623) nach 53 Std. 59 Min. 57,42 Sek. (2022-06-02)
comment
Keywords: Ceriani-Frolkin Theme (t), Unique Proof Game
Genre: Retro
Computer test: Computerprüfung: Natch 3.3 löst wie oben (Stellung 623) nach 53 Std. 59 Min. 57,42 Sek.
FEN: rn2k1n1/ppp2p2/4P3/5b1p/6pP/3PP3/PPPPr3/KR1NQ1N1
Input: Gerd Wilts, 2002-09-20
Last update: Alfred Pfeiffer, 2018-12-20 more...
96 - P1004211
Dan Meinking
R0115 StrateGems 20 10-12/2002
1. Preis
P1004211
(12+14) C+
BP in 27,0
1. a4 Sc6 2. Ta3 Sd4 3. Tg3 Sb5 4. Tg6 hxg6 5. b3 Th3 6. Lb2 Te3 7. Lf6 e5 8. dxe3 Le7 9.
Dd6 cxd6 10. a5 Dxa5 11. Kd1 b6 12. Sf3 Lb7 13. Sfd2 Lf3 14. gxf3 Ld8 15. Lh3 Lc7 16. Le6
fxe6 17. Kc1 Kf7 18. Td1 Tf8 19. Sf1 De1 20. h4 a5 21. h5 a4 22. h6 a3 23. h7 a2 24. h8=T
a1=T 25. Th2 Ta7 26. Sc3 Sh6 27. Sa2 Kg8
play all play one stop play next play all
Henrik Juel: Natch 3.1 did little in an hour (2018-12-16)
Vladimir Rey: Fix: P0115 StrateGems; 10. a5 Dxa5+ (2023-01-21)
comment
Keywords: Unique Proof Game
Genre: Retro
Computer test: Stelvio 1.2, 58min
FEN: 5rk1/r1bp2p1/1p1ppBpn/1n2p3/8/1P2PP2/N1P1PP1R/2KRqN2
Reprints: feenschach 153 10-12/2003
Input: Gerd Wilts, 2002-10-05
Last update: Reto, 2023-05-10 more...
97 - P1004212
Nicolas Dupont
R0116 StrateGems 20 10-12/2002
P1004212
(16+12) C+
BP in 27,0
1. d4 Sc6 2. Le3 Se5 3. dxe5 Sf6 4. exf6 a6 5. fxg7 Ta7 6. Lxa7 Tg8 7. Le3 Th8 8. Lg5 Tg8 9. f4 Th8 10. Kf2 Tg8 11. Kg3 Th8 12. Kh4 Tg8 13. g3 Th8 14. Lh3 Tg8 15. Lg4 Th8 16. h3 Tg8 17. Th2 Th8 18. Tf2 Tg8 19. Tf3 Th8 20. Ta3 Tg8 21. Ta5 Th8 22. a4 Tg8 23. Ta3 Th8 24. Tc3 Tg8 25. Tcc5 Th8 26. c4 Tg8 27. Sc3 Th8
play all play one stop play next play all
Henrik Juel: Natch 3.1 produced nothing in half an hour (2018-12-16)
Moldenhauer: Computerprüfung: C+ Stevio 1.11 1 Sekunde.
Keine Lösung: BP 26.0, BP 26.5. (2023-03-30)
comment
Keywords: Unique Proof Game, Pendulum (t x22)
Genre: Retro
Computer test: Stelvio 1.2, 1sec
FEN: 2bqkb1r/1pppppPp/p7/R1R3B1/P1P2PBK/2N3PP/1P2P3/3Q2N1
Input: Gerd Wilts, 2002-10-05
Last update: Reto, 2023-05-19 more...
98 - P1004214
Gianni Donati
R0100c StrateGems 20 10-12/2002
5.-7. Preis ex aequo
P1004214
(11+15) C+
BP in 22,5
1. Sf3 e5 2. Sd4 exd4 3. Sc3 dxc3 4. dxc3 g6 5. Le3 Lh6 6. Lb6 axb6 7. Dd4 Ta5 8. Td1 Lc1 9. Td3 Tg5 10. Tf3 d5 11. Tf6 Lg4 12. Td6 Lxe2 13. Td7 La6 14. Lb5 h5 15. Lc6 Sxc6 16. a4 Db8 17. Te7+ Kd8 18. Te4 h4 19. De5 h3 20. Tb4 Th4 21. Tb3 Sb4 22. Ta3 c6 23. Ta1
play all play one stop play next play all
wTa1 wandert nach d7 zum Schachschutz für den wLf1. 12zügier Rundlauf des wTa1.
Moldenhauer: Computerprüfung: C+ Stelvio 1.0 5 Sekunden.
Keine Lösung: BP 21.5, BP 22.0. (2023-02-18)
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comment
Keywords: Unique Proof Game, Pure Round Trip (T), Check Protection
Genre: Retro
Computer test: Stelvio 1.0
FEN: 1q1k2n1/1p3p2/bpp3p1/3pQ1r1/Pn5r/2P4p/1PP2PPP/R1b1K2R
Reprints: feenschach 153 10-12/2003
Input: Gerd Wilts, 2002-10-05
Last update: Silvio Baier, 2023-03-02 more...
99 - P1004245
Richard Stanley
Retros mailing list 10/2002
P1004245
(16+13) C+
ser-BP in 19
1. e4 2. Dg4 3. Dxg7 4. Dxg8 5. Dg3 6. Db3 7. g4 8. g5 9. g6 10. g7 11. g8=T 12. Tg7 13. Txf7 14. Tf3 15. Tc3 16. f4 17. f5 18. f6 19. f7#
play all play one stop play next play all
more ...
comment
Keywords: Unique Proof Game, Seriesmover, Promotion (T)
Genre: Retro, Fairies
Computer test: SCHRECKE: C+, Jacobi v0.7.5 (2020-12-07)
FEN: rnbqkb1r/pppppP1p/8/8/4P3/1QR5/PPPP3P/RNB1KBNR
Input: Gerd Wilts, 2002-11-01
Last update: A.Buchanan, 2021-04-09 more...
100 - P1004261
Göran Wicklund
Retros mailing list 10/2002
P1004261
(16+12) C+
ser-BP in 14.0
1. h4 2. Th3 3. Td3 4. Txd7 5. Td4 6. Te4 7. d4 8. d5 9. d6 10. Dd5 11. Dxb7 12. Dxb8 13. Dxc8 14. d7#
play all play one stop play next play all
A.Buchanan: Surely can stick wTe4 somewhere else so it doesn’t spoil the pure mate? :-) (2021-02-25)
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comment
Keywords: Unique Proof Game, Seriesmover
Genre: Retro, Fairies
Computer test: C+, popeye 4.85
FEN: r1Qqkbnr/p1pPpppp/8/8/4R2P/8/PPP1PPP1/RNB1KBN1
Input: Gerd Wilts, 2002-11-01
Last update: A.Buchanan, 2021-04-09 more...
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Gerd Wilts (100)