Chess Problem Database Server

46 problem(s) found in 2025 milliseconds (displaying 46 problem(s)). [COMMENTDATE>=20220810 AND K='Nicht-Partiesatzmaterial'] [download as LaTeX]

1 - P0000034
Joachim Brügge
5468 Die Schwalbe 98 04/1986

(13+12) C+
BP in 17,0
Wem gewidmet?

1. f4 a5 2. f5 a4 3. f6 a3 4. fxe7 axb2 5. exd8=S bxa1=S 6. Sxb7 Sf6 7. g4 Sxg4 8. Lb2 Se3 9. Sf3 Sc4 10. Lxg7 Lc5 11. Sa5 Lg1 12. Ld4 Lb7 13. Lf2 Tg8 14. Sd4 Lf3 15. c3 Sc6 16. Sc2 Tc8 17. Sb3 Sd4
play all

6S make "S"; 4L make "L"
"SL" = Sam Loyd

Ryan McCracken: Cooked...Nf6/Nh6 is one of many move defects. (2001-09-13)
Moldenhauer: Computerprüfung: Cooked Stevio 1.2 1 Sekunde.
Keine Lösung: BP 16.0, BP 16.5.
Beispiel Notation:1.f4 Sc6 2.Sf3 Sf6 3.f5 Tg8 4.g4 Sxg4 5.f6 a5 6.fxe7 a4 7.exd8=S a3
8.Sxb7 axb2 9.Sa5 bxa1=S 10.Lb2 Lb7 11.Lxg7 Lc5 12.Sd4 Se3 13.c3 Sc4 14.Sc2 Lg1
15.Ld4 Tc8 16.Lf2 Sd4 17.Sb3 Lf3.
Die Idee mit den Buchstaben SL im Diagramm finde ich super! (2023-05-20)
A.Buchanan: Yes I like the letter idea, which can only work in German. Do you think this was intentionally a non-unique PG? Given the triumphs of the unique PG genre, such problems do not impress, but it wouldn't be "cooked". Or maybe we should classify all non-unique PGs here as cooked? What do you think? (2023-05-21)
Henrik Juel: Testing gives the result 'cooked'
This problem is correct in the sense that all shortest proof games last 17.0 moves
Still the current C+ is rather misleading
I suggest no label, neither C+ nor cooked (2023-05-21)
Moldenhauer: Ich nehme an, dass die Absicht es Sam Loyd zu widmen, das Ziel war.
Deshalb für diese Ausführung C+. Wenn der Autor selbst angibt das es nur
einen Lösungsweg gibt ist die Aufgabe cooked. NUPG haben andere
Schachproblemfreunde festgestellt und als Schlüsselwort angegeben. Oder irre ich? (2023-05-21)
Olaf Jenkner: Machine translation is very poor as far as problem chess is concerned. (2023-05-23)
A.Buchanan: Hi Moldenhauser. Non-unique PGs are uncooked if 1) the move total is correct, (2) the intended theme appears in every shortest solution. For a problem like this where the theme is the final diagram, the second is vacuous. In 1986 some unique PGs were being already published, and I t can be difficult to discern the intention of the composer but I think this one was intended to be non-unique. I don’t think any non-unique PG can be classed as C+. (2023-05-23)
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Keywords: Non-standard material, Promotion, Non-Unique Proof Game, Symbolproblem Endstellung (SL)
Genre: Retro
Computer test: Computerprüfung: Cooked Stevio 1.2 1 Sekunde. Keine Lösung: BP 16.0, BP 16.5.
FEN: 2r1k1r1/2pp1p1p/8/8/2nn4/1NP2b2/P1NPPB1P/nN1QKBbR
Input: Gerd Wilts, 1995-06-03
Last update: A.Buchanan, 2023-05-23 more...

2 - P0000112
Dmitri W. Pronkin
Andrey Frolkin
6386v Die Schwalbe 113 10/1988

(14+14) cooked
BP in 45.0

1. f4 g5 2. f5 g4 3. f6 g3 4. fxe7 gxh2 5. g4 d5 6. g5 d4 7. g6 d3 8. g7 dxc2 9. d4 f5 10. Lf4 c1=T 11. Lg3 Tc6 12. Dd3 Tg6 13. Da6 Sf6 14. g8=L c5 15. Lb3 c4 16. d5 Kf7 17. e8=T c3 18. Te4 c2 19. Ta4 c1=L 20. e4 Lf4 21. Sd2 h5 22. 0-0-0 h4 23. Te1 h3 24. Ld1 Th4 25. d6 L8h6 26. d7 Dh8 27. d8=T Le6 28. Tc8 S8d7 29. Tc2 Kg8 30. e5 Lf7 31. e6 Tf8 32. e7 Lb8 33. e8=S f4 34. Te7 f3 35. Se2 f2 36. Tg1 h1=S 37. b4 h2 38. Lh3 f1=S 39. b5 Sf2 40. b6 h1=L 41. bxa7 b6 42. a8=L Lb7 43. Th1 Lc8 44. Lag2 Se3 45. Lf1 S6e4
play all

Cook: 1. b4 c5 2. b5 c4 3. b6 c3 4. bxa7 d5 5. e4 d4 6. f4 d3 7. f5 dxc2 8. d4 g5 9. Lf4 c1=L 10. d5 g4 11. f6 g3 12. fxe7 gxh2 13. g4 c2 14. Lg3 Lf4 15. g5 c1=T 16. g6 Tc6 17. Dd3 f5 18. Sd2 h5 19. g7 Tg6 20. 0-0-0 Sf6 21. Te1 h4 22. d6 h3 23. g8=L Th4 24. Lb3 L8h6 25. Ld1 Kf7 26. d7 Dh8 27. d8=T Le6 28. Td4 Sbd7 29. e5 Tf8 30. e8=T Kg8 31. Tc8 Lf7 32. e6 b6 33. e7 Lb8 34. e8=S f4 35. Te7 f3 36. Se2 f2 37. Tg1 h1=S 38. Da6 h2 39. Lh3 f1=S 40. Ta4 Sf2 41. Tc2 h1=L

Michel Caillaud: cooked by Stelvio 0.93 :
1.b4 c5 2.b5 c4 3.b6 c3 4.bxa7 d5 5.e4 d4 6.f4 d3 7.f5 dxc2 8.d4 g5 9.Lf4 c1=L 10.d5 g4 11.f6 g3 12.fxe7 gxh2 13.g4 c2 14.Lg3 Lf4 15.g5 c1=T 16.g6 Tc6 17.Dd3 f5 18.Sd2 h5 19.g7 Tg6 20.0-0-0 Sf6 21.Te1 h4 22.d6 h3 23.g8=L Th4 24.Lb3 L8h6 25.Ld1 Kf7 26.d7 Dh8 27.d8=T Le6 28.Td4 Sbd7 29.e5 Tf8 30.e8=T Kg8 31.Tc8 Lf7 32.e6 b6 33.e7 Lb8 34.e8=S f4 35.Te7 f3 36.Se2 f2 37.Tg1 h1=S 38.Da6 h2 39.Lh3 f1=S 40.Ta4 Sf2 41.Tc2 h1=L... (2022-12-20)
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Keywords: Unique Proof Game, Move Length Record, Non-standard material, Castling, Promotion (tLTlTSsslL)
Genre: Retro
FEN: 1bb1Nrkq/3nRb2/Qp4rb/8/R3n2r/4n1BB/P1RNNn2/2KB1B1R
Reprints: 583 Ukrainisches Album 1986-1990
80 Shortest Proof Games 11/1991
Input: Gerd Wilts, 1995-06-03
Last update: Silvio Baier, 2023-03-02 more...

3 - P0000254
Leonid M. Borodatow
7642 Die Schwalbe 133 02/1992

(16+10)
Welches waren die letzten 7 Einzelzüge, wenn dabei keine Zugwiederholungen vorkamen?

R: 1. 0-0-0# Ke4-d4 2. e5xf6ep+ f7-f5 3. Tg6-b6+ Kf5-e4 4. c7-c8=L
play all

Die von einigen Lösern angeführte Abweichung 2. f5-f6+ Kd4-e4 3. Lh6-g7+ (und mehrdeutig weiter) ließe sich durch die Erweiterung '... keine Zugwiederholungen und keine Pendelzüge ...' (mühsam) kitten. Beim Autor hieß es bei dieser ich-weiß-nicht-wie-vielten Fassung nur 'letzte 9 (!) Einzelzüge ohne Wiederholung).
HHS meint ohnehin, daß es das ganze auch ohne die einengende Zusatzbedingung schon gibt.
Das von einem Löser angegebene 1. Ld3-h7# Th1-h8 2. Lh8-g7 Tg1-h1 3. Se1-g3 g2-g1=T 4. Th7-h8=L scheitert allerdings an der Schlagbilanz.

Anton Baumann: Neufassung vergl. P0006288 (2023-01-06)
comment

Keywords: En passant, Last Moves?, Non-standard material, Castling (wl), Promotion (L), Valladao Task (WWW)
Genre: Retro
FEN: qrB2brr/Bp2p1BB/pR3P2/1Q6/2Pk1P2/B1p2R2/2P3N1/2KR1N2
Input: Gerd Wilts, 1995-06-03
Last update: Rainer Staudte, 2019-08-11 more...

4 - P0000684
Simo Ylikarjula
2531 Die Schwalbe 52 08/1978

(15+15) cooked
BP in 18,0

NL: 1. d4 d6 2. Kd2 Le6 3. g4 f5 4. g5 Lf7 5. g6 Sd7 6. e4 Db8 7. gxf7+ Kd8 8. Kc3 g5 9. Kc4 g4 10. Kd5 Lg7 11. Ke6 Kc8 12. f8=L g3 13. Kf7 g2 14. Ke8 gxf1=L 15. e5 Lg2 16. Se2 d5 17. Lg5 Lh3 18. e6
Die Autorlösung wurde nie publiziert und ist unbekannt.
play all

Moldenhauer: Computerprüfung: C+ NUPG cooked Stelvio 1.11 in 1 Sekunde.
Keine Lösung: BP 17.0. BP 17.5 cooked.
Beispiel BP 18.0: 1.d4 Sa6 2.Kd2 Sb8 3.Kc3 d6 4.e4 Le6 5.Se2 Sd7 6.e5 Db8 7.g4 Kd8
8.g5 f5 9.g6 Lf7 10.gxf7 Kc8 11.Kc4 g5 12.Kd5 Lg7 13.Ke6 d5 14.f8L g4 15.Kf7 g3
16.Ke8 g2 17.Lg5 gxf1L 18.e6 Lh3
Beispiel BP 17.5: 1.d4 Sa6 2.Kd2 Sc5 3.Ke3 d5 4.Kf4 Le6 5.Ke5 Kd7 6.e4 Db8
7.g4 Kc8 8.g5 f5 9.g6 Lf7 10.gxf7 Sd7+ 11.Ke6 g5 12.Se2 Lg7 13.e5 g4 14.Lg5 g3
15.f8L g2 16.Kf7 gxf1L 17.Ke8 Lh3 18.e6 (2023-05-07)
comment

Keywords: Non-Unique Proof Game, Non-standard material
Genre: Retro
FEN: rqk1KBnr/pppnp1bp/4P3/3p1pB1/3P4/7b/PPP1NP1P/RN1Q3R
Input: Gerd Wilts, 1995-06-03
Last update: A.Buchanan, 2014-05-20 more...

5 - P0001114
Michel Caillaud
3676 Die Schwalbe 71 10/1981
3. ehrende Erwähnung

(13+12)
#1
Mars-Circe

Gerald Ettl: 1.h8D# (2023-04-03)
Gerald Ettl: die Stellung loest sich auf indem der sK nach b1 - g8 wandert und dann Sg5 weg zieht. Der wK kommt ueber g5 raus. (2023-04-03)
Michel Caillaud: The original stipulation is #1 (durch wen?).
As wPe2 cannot be captured on its file, the 4 white captures for 4 Pawns to promote to Knights are (a2)xb3, (e2)xf3 and (f2)xg3 2 times, and wPb2 was captured on its file by (Dd8)xb6.
As b3-b2 (before (a2xb3)) and c7-c6 (before (Dd8)xb6) cannot be immediately retracted, only bK and wSs can play the last moves.
As indicated by Gerald, bK has to go to g8 to unlock the position, freeing bSg5.
When Ka3-a2 is retracted, previous white move places the 6 white Knights on black squares; the resulting Retro-Opposition implies that black is to play in the diagram position.
1.b1S#! (1g8D#?) (2023-04-04)
Gerald Ettl: Danke Michel fuer Dein Erklärung.
Ich löse so auf, dass Schwarz am Rückzug ist:
R: 1.Kc1b1 Se4d6 2.Bb2b3 Sc5d3 3.Kb1a2 Sd3c1 4.Ka2b1 Sh1f2 5.Kb1a2 Sa4c5 6.Bb3b4 Sf5e3 7.Ka2a3 La1d4 8.Ka3a4 Sf2h1 9.Ka4a5 Sh1f2 10.Ka5b6 Sf2h1 11.Kb6c7 Sh1f2 12.Kc7d8 Sf2h1 13.Kd8e8 Sh1f2 14.Ke8f8 Sf2h1 15.Kf8g8 Sh1f2 16.Sg5f3 Kh6g5 17.Sb8a6 Sc5a4 18.Sa6c5 Sd6b5 19.Sc5b3 Sb5c7 20.Sb3a1 Sc7a6 21.Sa1b3 Sa6b8 22.Sb3a1 Sa4b6 23.Sa1b3 Sb6c8 24.Sb3a1 Sb8b7[+wBb7] 25.Sa1b3 Bb7a6[+sLb7] 26.Sb3a1 Sc8c7[+wBc7] 27.Lb7c8 Kg5h4 28.Sa1b3 Tg6g5 29.Sb3a1 Tg5f5 30.Sa1b3 Tf5f4 31.Tg7g5 Sf2h1 32.Tg5b5 Sh1f2 33.Tb5b8 Sf2h1 34.Bb4b5 Sh1f2 35.Bb5b7 Bc7b6[+sLc7] 36.Tb8a8 Tf4e4 37.Lc7f4 Sg3f5 38.Kg8f8 Sf2h3 39.Lf4h6 Sc1e2 40.Kf8e8 Se2g3 41.Lh6f8 Sf5h6 42.Sb3a1 Sh6g8 43.Sa1b3 Sg8g7[+wBg7] 44.Sb3a1 Bg7g6 45.Sa1b3 Bg6f5[+sTg6] 46.Tg6g8 Bf5f4 47.Tg8h8 Sg3f5 48.Sb3a1 Sf5h6 49.Sa1b3 Sh6g8 50.Sb3a1 Sg8g7[+wBg7] 51.Bg4g5 Bg7g6 52.Bf6g7[+wDf6] Lh5g4 53.Sa1b3 Bh7h6 54.Sb3a1 Bh6h5 55.Bg5h6[+wTg5]
warum geht das nicht? Den Zug b1S# habe ich vorher ueberhaupt nicht gesehen. (2023-04-04)
Gerald Ettl: Jetzt habe ich es gesehen: der wBa2 musste ja von a2 geschlagen haben. (2023-04-04)
comment

Keywords: Circe (Mars), Non-standard material, Promotion
Genre: Retro, Fairies
FEN: 1n6/p2ppprP/2p2pRK/2N2NnB/N3N1p1/6N1/1pPP4/B1k4N
Input: Gerd Wilts, 1995-06-03
Last update: A.Buchanan, 2019-02-03 more...

6 - P0001270
Matti Arvo Myllyniemi
142 Europe Echecs 84 01/1966

(15+15) C+
BP in 9.5

1. e3 d5 2. Lc4 d4 3. Se2 d3 4. 0-0 dxc2 5. d4 Kd7 6. d5 Kd6 7. Dd4 Sd7 8. Ld2 c1=L 9. Lb4+ c5 10. dxc6ep+
play all

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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...

7 - P0001427
Karl Fabel
Am Rande des Schachbretts 1947

(13+14) C+
BP in 41,5

1. Sf3 a5 2. Sd4 a4 3. Sb3 axb3 4. a3 Ta4 5. Ta2 bxa2 6. Tg1 axb1=S 7. Th1 Sc3 8. Tg1 Sb5 9. Th1 Sa7 10. Tg1 b5 11. Th1 Lb7 12. Tg1 Ld5 13. Th1 La2 14. b3 h5 15. Lb2 h4 16. Lf6 h3 17. Lh4 Sf6 18. Da1 Sh5 19. Df6 Tf4 20. Da6 e6 21. Kd1 Dg5 22. Kc1 Dg3 23. hxg3 Lc5 24. gxf4 Le3 25. Lg3 Ke7 26. Lh2 Kf6 27. g3 Kf5 28. Lg2 Kg4 29. La8 Sbc6 30. Kb2 Tb8 31. Ta1 Lb1 32. Lg1 h2 33. Kc3 Kh3 34. Kd3 Kg2 35. Ke4 Kf1 36. Kf3 Ke1 37. Kg4 Kd1 38. Kg5 f6+ 39. Kg6 Kc1 40. Kf7 Sd8+ 41. Ke8 Kb2 42. Ta2+
play all

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...

8 - P0001569
Andrey Frolkin
439v Europe Echecs 310 10/1984
Lob

(12+14) cooked
BP in 27,0

1. f4 h5 2. f5 h4 3. f6 h3 4. fxe7 f5 5. d4 Kf7 6. e8=T Kg6 7. Te6+ Kh5 8. Ta6 bxa6 9. Dd2 Lb7 10. e4 Lc6 11. e5 La4 12. e6 Sc6 13. e7 Db8 14. e8=T Db3 15. Te5 Te8 16. d5 Te6 17. dxe6 Lb4 18. Ta5 Lc3 19. Lb5 f4 20. e7 f3 21. e8=T f2+ 22. Ke2 f1=S 23. Tb8 Sxh2 24. Tb6 cxb6 25. Sf3 bxa5 26. Se5 Sf3 27. Sg4 Sfd4+
play all

Cook: 1. f4 h5 2. f5 h4 3. f6 h3 4. fxe7 f5 5. e4 Kf7 6. e8=T f4 7. Te6 f3 8. Ta6 bxa6 9. e5 Kg6 10. e6 Lb7 11. e7 Lc6 12. e8=T La4 13. Te5 Sc6 14. Ta5 Db8 15. d4 Db3 16. Lb5 f2 17. Ke2 f1=S 18. Sf3 Te8 19. Se5 Kh5 20. d5 Te6 21. dxe6 Sxh2 22. e7 Sf3 23. e8=T Lb4 24. Tb8 Lc3 25. Tb6 cxb6 26. Sg4 bxa5 27. Dd2 Sd4

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Keywords: Ceriani-Frolkin Theme (TTT), Unique Proof Game, Non-standard material, Promotion (s)
Genre: Retro
Computer test: Computerprüfung: Cooked Stelvio 1.11 1 Sekunde. Keine Lösung: BP 26.0, BP 26.5.
FEN: 6nr/p2p2p1/p1n5/pB5k/b2n2N1/1qb4p/PPPQK1P1/RNB4R
Reprints: 21 Shortest Proof Games 11/1991
Input: Gerd Wilts, 1995-06-03
Last update: A.Buchanan, 2023-05-08 more...

9 - P0001629
Andrey Frolkin
498 Europe Echecs 355/356 07-08/1988
2. ehrende Erwähnung

(14+14) C+
BP in 26,5

1. Sc3 c5 2. Sd5 c4 3. Sxe7 c3 4. Sg6 hxg6 5. Sf3 Th5 6. Sd4 Ta5 7. Sb5 f5 8. Sa3 Df6 9. Sb1 La3 10. Tg1 d6 11. Th1 Ld7 12. Tg1 La4 13. Th1 Kd7 14. Tg1 Kc6 15. Th1 Kb5 16. Tg1 Sc6 17. Th1 Te8 18. Tg1 Te3 19. Th1 Td3 20. cxd3 c2 21. Tg1 cxd1=S 22. Th1 Sc3 23. Tg1 Se4 24. Th1 Dc3 25. Tg1 Sgf6 26. Th1 Se8 27. Tg1
play all

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...

10 - P0001641
Francois Brassaud
510 Europe Echecs 367/368 07/1989
A. Hazebrouck gewidmet

(13+14) cooked
KBP?

1. h4 e5 2. h5 Ke7 3. h6 Kd6 4. hxg7 Kc5 5. Th6 Kb4 6. Tc6 h5 7. e4 h4 8. Ke2 h3 9. Kf3 Th4 10. Le2 Sh6 11. g8=L f6 12. Lb3 h2 13. c4 h1=S 14. Dc2 Sg3 15. fxg3 a5 16. g4 a4 17. g5 axb3 18. g6 bxc2 19. g7 cxb1=T 20. g8=D
play all

Cook: 1. c2-c4 a7-a6 2. e2-e4 e7-e6 3. f2-f4 h7-h5 4. Dd1xh5 Ke8-e7 5. Dh5-b5 Th8-h4 6. Ke1-e2 Th4-g4 7. h2-h4 a6xb5 8. h4-h5 b5-b4 9. h5-h6 Ke7-d6 10. h6-h7 Kd6-c5 11. Th1-h6 Tg4-h4 12. h7-h8=D g7-g6 13. Dh8-c3 b4xc3 14. Ke2-f3 c3-c2 15. f4-f5 c2xb1=T 16. f5xg6 Kc5-b4 17. g6-g7 e6-e5 18. Th6-c6 f7-f6 19. Lf1-e2 Sg8-h6 20. g7-g8=D (H. Juel)

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Keywords: Allumwandlung, Ceriani-Frolkin Theme (Ls), Unique Proof Game, Non-standard material
Genre: Retro
Computer test: Euclide 1.01 Moldenhauer: Computerprüfung: Cooked Stelvio 1.11 2 Sekunden. Keine Lösung: BP 18.5, BP 19.0. KBP = 19.5.
FEN: rnbq1bQ1/1ppp4/2R2p1n/4p3/1kP1P2r/5K2/PP1PB1P1/RrB3N1
Reprints: 135 Shortest Proof Games 11/1991
Input: Gerd Wilts, 1995-06-03
Last update: A.Buchanan, 2023-04-15 more...

11 - P0001750
Michel Caillaud
Johannes Markus Ott
3710 feenschach 63 12/1982
K. Widlert gewidmet
2. Preis

(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

13-zügiges Tempoverlustmanöver des wK.

Moldenhauer: Computerprüfung: C+ Stelvio 1.2 18 Sekunden.
Keine Lösung: BP 23.5, BP 24.0. (2023-05-12)
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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...

12 - P0002241
Michel Caillaud
3817 feenschach 65 15/05/1983
1. ehrende Erwähnung

(13+14)
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

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)
comment

Keywords: Ceriani-Frolkin Theme (TTT), Unique Proof Game, Non-standard material, Promotion (sTTT)
Genre: Retro
FEN: n1n1nb2/2p1p2k/Bp5B/p7/prK1Pp2/rPPP3N/P2N2b1/2RQR3
Reprints: 20 Shortest Proof Games 11/1991
Input: Gerd Wilts, 1995-06-03
Last update: A.Buchanan, 2021-04-06 more...

13 - P0003969
Roger Diot
André Hazebrouck
RA163 diagrammes 73 09-10/1985

(12+12)
#1
KBP?

Henrik Juel: 1... Txa2#, not 1.Dxb2? -1.Td1xSe1 Sf3 -2.Te1 h7 -3.Td1 Sh4 -4.Te1 Sf5 -5.Td1 Sh6 -6.Te1 Sg4xPh6 -7.Td1 Sf2 -8.Te1 Sd1 -9.h5 Kc1 -10.h4 Ld3 -11.h3 Kc2 -12.h2 Sf2 -13.Td1, retract sLd3 to c8, b7-b6, etc. Black promoted b2-b1=T and f2xTg1=L. The shortest proof game is rather long! (2003-12-19)
Moldenhauer: Histogramm Stelvio 1.2 128/0k bei BP 37.0.
Kein Histogramm bei BP 36.0, BP 36.5. Computerprüfung wird sehr lange dauern
da eine 5+1 auch nach 5 Stunden noch nicht fertig ist! Nur 49 Strategien sind
unter 5+1. Vielleicht kommt aber das "cooked" früher dazwischen. (2023-05-10)
comment

Keywords: Whose move?, Non-standard material, Non-Unique Proof Game
Genre: Retro
FEN: N7/2Pp2p1/1prp3p/b1p5/1b6/PPP5/QrkPP1P1/Kb2RB2
Input: Gerd Wilts, 1995-06-03
Last update: A.Buchanan, 2014-05-21 more...

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

(13+16) cooked
BP in 34,5

1. Sc3 h5 2. Se4 h4 3. Sg3 hxg3 4. h4 Th5 5. Th2 gxh2 6. Tb1 hxg1=S 7. Ta1 Sh3 8. Tb1 Sf4 9. Ta1 Sd5 10. Tb1 Sb4 11. Ta1 Td5 12. Tb1 g5 13. Ta1 Lg7 14. Tb1 Ld4 15. Ta1 Lb6 16. Tb1 c5 17. Ta1 Dc7 18. Tb1 De5 19. Ta1 Ld8 20. Tb1 b6 21. Ta1 La6 22. Tb1 Lc4 23. Ta1 a6 24. Tb1 Ta7 25. Ta1 Tc7 26. Tb1 Tc6 27. Ta1 Tf6 28. Tb1 d6 29. Ta1 Kd7 30. Tb1 Ke6 31. Ta1 Kf5 32. Tb1 Kg4 33. Ta1 Tf5 34. Tb1 Sf6 35. Ta1
play all

Korrektur siehe P0008426.
James Malcom: What is the cook? (2023-05-02)
more ...
comment

Keywords: Unique Proof Game, Non-standard material, Pendulum (T x30), Superseded by (P0008426)
Genre: Retro
FEN: 1n1b4/4pp2/pp1p1n2/2prqrp1/1nb3kP/8/PPPPPPP1/R1BQKB2
Reprints: (12) feenschach 117 11/1995
Input: Gerd Wilts, 1995-06-26
Last update: James Malcom, 2023-05-02 more...

15 - P0007039
Andrey Frolkin
3406 U.S. Problem Bulletin 102/103 07-10/1995

(12+16) C+
BP in 27,0

1. Sf3 a5 2. Sd4 a4 3. Sb3 axb3 4. a3 Ta4 5. Ta2 bxa2 6. Tg1 axb1=S 7. Th1 Sc3 8. Tg1 Se4 9. c3 Sg3 10. Dc2 Sh1 11. Dg6 hxg6 12. Kd1 Th5 13. Kc2 Sh6 14. Kd3 Td5+ 15. Ke3 e5 16. Kf3 Dh4 17. Ke3 Lc5+ 18. Kf3 La7 19. h3 b6 20. Ke3 La6 21. Kf3 Ld3 22. Ke3 Lf5 23. Kf3 e4+ 24. Ke3 Sg4+ 25. Kf4 Dh8 26. Kg5 f6+ 27. Kf4 g5+
play all

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...

16 - P0008537
Michel Caillaud
615v Europe Echecs 452 01/1997

(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

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...

17 - P0008800
Andrey Frolkin
9650 Die Schwalbe 165 06/1997
1.-2. Preis ex aequo

(14+15) C+
KBP?
UWF sind in der Diagrammstellung
a) erlaubt
b) nicht erlaubt

a) 1. d4 e5 2. Lf4 Dg5 3. e3 f6 4. La6 bxa6 5. h4 Lb7 6. h5 Lxg2 7. h6 Lh3 8. hxg7 h5 9. Se2 Sh6 10. g8=L Lg7 11. Ld5 Tf8 12. Lb7 Sc6 13. Tf1 Td8 14. Lc8 Kf7
b) 1. h4 e5 2. h5 Dg5 3. h6 f6 4. hxg7 h5 5. d4 Sh6 6. g8=L Lg7 7. Lc4 Tg8 8. La6 bxa6 9. Lf4 Lb7 10. e3 Lxg2 11. Se2 Lh3 12. Lg2 Kf7 13. Lb7 Sc6 14. Tf1 Td8 15. Lc8
play all

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...

18 - P0009046
Peter Wong
9923 Die Schwalbe 169 02/1998
4. Preis

(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

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...

19 - P0569740
Karl Fabel
1192 Schachmatt 01/08/1948

(11+10) C+
h#48 (nicht exakt!)

1. g4 Lxg4 2. Lg5 Lf3 3. Lh6 ... 4. Lf8 ... 5. Ld6 ... 6. Lc7 ... 7. La5 ... 8. Lb4 ... 9. La3 ... 10. Lc1 ... 11. Ld2 ... 12. Le1 ... 13. Lf2 ... 14. Lxg1 ... 15. Kg5 ... 16. Kh6 ... 17. Kg7 ... 18. Kf8 ... 19. Ke7 ... 20. Kd6 ... 21. Kc7 ... 22. Kb6 ... 23. Ka5 ... 24. Kb4 ... 25. Ka3 ... 26. Kb2 ... 27. Kc1 ... 28. Kd2 ... 29. Ke1 ... 30. Kxf1 ... 31. Ke1 Kxg1 32. Kd1 Kf1 33. Kc1 Ke1 34. Kb2 Kd1 35. Ka3 Kc1 36. Ka4 Kb1 37. Ka5 Ka2 38. Kb6 Ka3 39. Kc6 Ka4 40. Kd6 Kb5 41. Ke7 Kc6 42. Kf8 Kd6 43. Kg7 Ke6 44. Kh8 Kxf6 45. Kg8 Kg6 46. Kh8 f6 47. Kg8 f7+ 48. Kh8 f8=D,T#
play all

James Malcom: I don’t believe that the great Fabel, with his keen eye, would have not seen such a simply cook as the taking of Black’s c5 pawn. I suspect that a Black bishop was on d4 but was forgotten placing the problem in the database, or it was a misprint. I am changing this problem to not cooked for now. However, someone should check the original source in the event I am wrong, which is always a possibility. (2020-03-15)
Mario Richter: Hi, James, there's indeed a black bishop on d4. Original stipluation: "h#48 (nicht exakt!)"
A scan for some issues of 'Schachmatt' is available in the archive at stere.ro, see
www.stere.ro/wp-content/uploads/2014/06/stere_sah_istoria_sahului-1947-1949-Schachmatt1.pdf (2020-03-26)
Joost de Heer: Stupid question, but won't moving Bh3 to g4 add another halfmove? (2023-01-30)
Henrik Juel: Yes, Joost, but this would make the solution even less exact
0... Lf3,Lh3,Lh5 1.g4 Lxg4 etc. (2023-01-30)
Joost de Heer: @Henrik: So? This is an attempt at a non-unique (exact is something else) h# length record, the level of non-uniqueness is irrelevant. And as James pointed out, adding Kg4-f4 will add yet another move.
Only possible cooks are when white starts with 1... Bh5 2. g4 Be8 (so not capturing Pg4) but I don't see how that could lead to a quicker mate. (2023-01-31)
James Malcom: I double-checked that myself, Joost, and found that going around for wPg2 actually takes far longer, which would be required any PxB action to take place, but that takes far longer than the normal solution. I know Olaf's Gustav would check, since it C+ the h#111. (2023-01-31)
more ...
comment

Keywords: Non-standard material, Promotion in the mating move
Genre: h#
Computer test: Gustav 4.2 b: Es gibt kein kürzeres Matt
FEN: 8/8/5p2/2p1pPp1/2PbPk1b/2pBp1pB/2P1P1P1/5BRK
Input: hpr, 1999-03-31
Last update: Olaf Jenkner, 2023-01-31 more...

20 - P1000246
Andrej N. Kornilow
Alexander Kislyak
10666 Die Schwalbe 181 02/2000

(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

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...

21 - P1000634
Michel Caillaud
R081 Probleemblad 03-04/2000

(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

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...

22 - P1012989
Hugo August
Sahovski vjesnik 1950
1. Preis

(14+12)
BP in 21,0

1. h3 h6 2. Th2 a6 3. a4 Ta7 4. a5 h5 5. Ta4 Th6 6. Tf4 Tb6 7. axb6 Sc6 8. bxa7 Sb8 9. axb8=L Sf6 10. La7 Sd5 11. Le3 Sc3 12. dxc3 a5 13. Dd3 a4 14. Led2 a3 15. e3 a2 16. Le2 a1=L 17. Lg4 hxg4 18. Ke2 g3 19. Kf3 gxh2 20. Ke4 h1=L 21. Ke5 f6+
play all

No. 928 HN
Mario Richter: My assumption: a record construction for the ratio g/f with f=number of uniquely determined last moves, g=length of the shortest proof game (s. Fairy Chess Review No.9 28.Nov.1949, p.69 for an explanation), here we have 42/19 (2012-07-16)
Moldenhauer: Computerprüfung: C+ Stelvio 1.11 1 Sekunde.
BP 21.0 cooked da NUPG C+.
Keine Lösung: BP 20.0, BP 20.5, BP 21.5, BP 22.0 cooked.
Beispiel BP 21.0: 1. a4 Sa6 2. a5 Sb8 3.Ta4 Sf6 4. Tf4 Sd5 5. h3 Sb6
6. Th2 a6 7. axb6 Ta7 8. bxa7 h5 9. axb8=L Th6 10. La7 Tc6 11. Le3 Tc3
12. dxc3 a5 13. Dd3 a4 14. Led2 a3 15. e3 a2 16. Le2 a1=L 17. Lg4 hxg4
18. Ke2 g3 19. Kf3 gxh2 20. Ke4 h1=L 21. Ke5 f6+ (2023-03-24)
A.Buchanan: I think it's perhaps a little disrespectful to describe the problem is "cooked" when there is no intention for the PG to be solution to be unique. It's certainly good to know that there is no shorter solution. (2023-03-25)
comment

Keywords: Non-Unique Proof Game, Non-standard material
Genre: Retro
FEN: 2bqkb2/1pppp1p1/5p2/4K3/5R2/2PQP2P/1PPB1PP1/bNB3Nb
Input: Henri Nouguier, 2004-01-11
Last update: A.Buchanan, 2023-03-25 more...

23 - P1013075
Richard J. Dunn
R344v The Problemist 01/2004

(15+15) C+
BP in 16,5

1. d4 Sc6 2. d5 Sd4 3. Lf4 Sxe2 4. Lg3 Sc1 5. La6 c6 6. c4 Da5+ 7. Sc3 Kd8 8. f4 Kc7 9. f5+ Kb6 10. f6 Kc5 11. fxg7 Sf6 12. g8=T Se4 13. Tg4 Sd2 14. Se4+ Kd4 15. Sc5+ Ke3 16. Td4 Sf1+ 17. Td2
play all

First version had Sf1 on b1.
Moldenhauer: Computerprüfung: C+ Euclide 1.11 eindeutige Lösung
gekocht bei BP 17.0 und bei BP 16.0 Umwandlungsfehler (2022-08-21)
comment

Keywords: Unique Proof Game, Non-standard material (T)
Genre: Retro
Computer test: Stelvio 1.2, 2sec
FEN: r1b2b1r/pp1ppp1p/B1p5/q1NP4/2P5/4k1B1/PP1R2PP/R1nQKnNR
Input: Gerd Wilts, 2004-02-04
Last update: Reto, 2023-05-19 more...

24 - P1014060
Nils Adrian Bakke
Hans Gruber
Rainer Staudte
8600v feenschach 146 03-05/2002

(10+7) C+
s#9

1. Df2+? Tf3!
1. Df3+! Txf3 2. Def7+ Txf7 3. Deg7+ Txg7 4. Ddg8+ Txg8 5. Df2+ Lxf2 6. De8+ Kxe8 7. Dd8+ Kxd8 8. Dc8+ Kxc8 9. Dc7+ Kxc7#
play all

Rainer Staudte: In feenschach sollte nach 2012 eine Korrektur dieser Aufgabe erschienen sein. Wer kann diese finden? (2022-08-10)
more ...
comment

Keywords: Opferminimal, Non-standard material (DDDDDDDD)
Genre: s#
Computer test: a) die letzten 7 Züge sind C+ (Volltest) b) mit der Popeye-Option "nichttr 0 1" C+ c) mit der Gustav-Option "42 U-" C+
FEN: K4k2/Q6Q/Q3Q1p1/p2QQ1Q1/Qpp1Q3/6r1/8/4b3
Input: Hans Gruber, 2004-05-01
Last update: Gerd Wilts, 2023-05-02 more...

25 - P1066789
Göran Wicklund
R259 Probleemblad 5 09-10/2004
5. Preis

(16+11) C+
BP in 29,5

1. h4 Sc6 2. h5 Sd4 3. h6 Sb5 4. hxg7 h5 5. Th3 h4 6. Tg3 h3 7. a4 h2 8. a5 h1=D 9. a6 Dh2 10. axb7 a5 11. bxa8=T Lb7 12. Ta4 Lc6 13. Th4 a4 14. d4 a3 15. d5 a2 16. d6 a1=S 17. dxc7 Sb3 18. Ta1 Sa3 19. c8=T La4 20. Ta8 Db8 21. f4 Kd8 22. f5 Kc7 23. f6 Kb6 24. fxe7 Sf6 25. e8=T Ld6 26. Tc8 Te8 27. g8=T Te7 28. Tge8 Lc7 29. Tgg8 Dd6 30. Th1
play all

Zyklischer Platzwechsel sechs weißer Türme.

more ...
comment

Keywords: Unique Proof Game, Non-standard material, Interchange (TTTTTT), Impostor (TT)
Genre: Retro
Computer test: Moldenhauer: Computerprüfung: C+ Stelvio 1.11 00:05:59 Minuten. (hh:mm:ss) keine Lösung: BP 28.5, BP 29.0.
FEN: RqR1R1R1/2bprp2/1k1q1n2/8/b7/nn6/1PP1P1P1/RNBQKBNR
Reprints: (18) StrateGems 10-12/2007
(80) Die Schwalbe 250A 08/2011
Input: Gerd Wilts, 2004-10-17
Last update: A.Buchanan, 2023-04-15 more...

26 - P1068020
Itamar Faybish
Problem Online 08/2005
8. Platz
Kategorie C

(10+10) C+
BP in 15,0

1. f4 a5 2. f5 a4 3. f6 a3 4. fxe7 f6 5. exf8=S De7 6. Sxh7 Kd8 7. Sxf6 Txh2 8. Sxd7 Txh1 9. Sf8 Th3 10. gxh3 axb2 11. Lg2 bxc1=S 12. Lh1 Sxa2 13. Dc1 Sc3 14. Ta4 Sxe2 15. Da3 Sc1+
play all

Henrik Juel: Natch 3.1 found the solution, but did not conclude in some 5 hours (2018-12-22)
Moldenhauer: Computerprüfung: C+ Natch 3.3 2 Std. 55 Min. und Euclide 1.11 1 Std. 32 Min.
Keine Lösung in BP14, BP 14,5, BP 15,5. (2022-12-16)
comment

Keywords: Unique Proof Game, Promotion (Ss), Non-standard material (Ss)
Genre: Retro
Computer test: Stelvio 1.2, 22min
FEN: rnbk1Nn1/1pp1q1p1/8/8/R7/Q6P/2PP4/1Nn1K1NB
Input: Gerd Wilts, 2005-08-21
Last update: Reto, 2023-05-17 more...

27 - P1068230
Philippe Leroy
4922 Phénix 142 07-08/2005
Pascal Wassong gewidmet

(13+16)
BP in 25,5

1. e3 h5 2. Lb5 Sh6 3. Lc6 dxc6 4. a4 Dd3 5. Ta3 Dh7 6. Td3 Lg4 7. Td6 f5 8. Tf6 exf6 9. e4 Lb4 10. e5 0-0 11. e6 Td8 12. e7 Td3 13. e8=L Tc3 14. d4 b5 15. d5 bxa4 16. d6 a3 17. d7 a2 18. d8=T a1=D 19. Td7 Da6 20. Tf7 Dd3 21. Ld7 a5 22. Le6 Sa6 23. La2 Td8 24. Te7+ Td5 25. Te6 Tdc5 26. Te8#
play all

Henrik Juel: Natch 3.1 did little in more than an hour
Stopped at position 1 (2018-12-22)
Moldenhauer: Computerprüfung: C+ Stevio 1.0 7:08:52 Stunden.
Keine Lösung: BP 24.5, BP 25.0. (2023-02-14)
more ...
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Keywords: Unique Proof Game, Non-standard material (d), Promotion (LTd), Phoenix (TL)
Genre: Retro
FEN: 4R1k1/2p3pq/n1p2p1n/p1r2p1p/1b4b1/2rq4/BPP2PPP/1NBQK1NR
Input: Gerd Wilts, 2006-01-22
Last update: A.Buchanan, 2021-02-20 more...

28 - P1070024
Thierry Le Gleuher
R312v Probleemblad 10-12/2007

(9+15) C+
BP in 29.5

1. e3 h5 2. Dg4 hxg4 3. Sf3 gxf3 4. Le2 fxe2 5. Tf1 exf1=L 6. Sc3 Lc4 7. Sa4 Le6 8. Sb6 axb6 9. b3 Ta5 10. La3 Tg5 11. Lc5 bxc5 12. a3 b5 13. a4 Lb7 14. a5 Le4 15. a6 c6 16. a7 Sa6 17. f3 Db8 18. f4 Kd8 19. f5 Kc7 20. f6 L4f5 21. e4 Kd6 22. e5+ Kxe5 23. h3 Kf4 24. h4 Kg3 25. h5 Kh2 26. h6 Kg1 27. hxg7 Th1 28. c3 Dh2 29. c4 Dh8 30. 0-0-0+
play all

paul: Five times delayed ascension of wPawns. See P0000309, the previous record. (2010-05-10)
Vladimir Rey: Probably, cook: Natch 3.3 test, first 28 moves. (2023-01-24)
A.Buchanan: According to Reto, Stelvio indicates this is sound (2023-01-25)
Vladimir Rey: OK! Wrong cook (white king moves: Kd1,Ke1 and castling is impossible, 30. 0-0-0+!) (2023-01-25)
more ...
comment

Keywords: Unique Proof Game, Tempo Loss (BBBBB), Promotion (l), Non-standard material (l)
Genre: Retro
Computer test: C+ Stelvio 1.0
FEN: 5bnq/P2pppP1/n1p1bP2/1pp2br1/2P5/1P6/3P2P1/2KR2kr
Input: Gerd Wilts, 2008-09-08
Last update: A.Buchanan, 2023-01-25 more...

29 - P1080420
Thierry Le Gleuher
R284 Probleemblad 07-08/2005

(14+13) C+
BP in 20,5

1. Sc3 f5 2. Sd5 Sf6 3. Sxe7 Sd5 4. Sg6 De7 5. a3 Dxa3 6. e4 d6 7. Se2 Kd7 8. Sc3 Kc6 9. Sb1 Sd7 10. Lb5+ Kxb5 11. e5 Ka4 12. e6 b5 13. e7 S7b6 14. exf8=S Ld7 15. Sxh7 Taf8 16. Sg5 Th4 17. Sh3 Tb4 18. Dg4 Le8 19. Dd4 f4 20. Sg1 Tf5 21. Sf8
play all

Henrik Juel: Cyclical shift by three white knights.
Sf8 is [Sb1], Sb1 is [Sg1], Sg1 is a promotee from f8 (2014-08-20)
Moldenhauer: Computerprüfung: C+ Stelvio 1.0 2 Sekunden.
Keine Lösung: BP 19.5, BP 20.0. (2023-03-02)
more ...
comment

Keywords: Unique Proof Game, Non-standard material
Genre: Retro
Computer test: Stelvio 1.0
FEN: 4bN2/p1p3p1/1n1p4/1p1n1r2/kr1Q1p2/q7/1PPP1PPP/RNB1K1NR
Reprints: (13) StrateGems 10-12/2007
Input: Gerd Wilts, 2009-01-06
Last update: Silvio Baier, 2023-03-03 more...

30 - P1080525
Andrey Frolkin
Kostas Prentos
P0190 StrateGems 34 2006
1. Lob

(14+12) C+
BP in 26,5

1. f4 h5 2. f5 h4 3. f6 h3 4. fxe7 hxg2 5. exf8=L Th3 6. Lc5 Tg3 7. Lb6 axb6 8. h4 Taa3 9. h5 Tac3 10. bxc3 Dh4 11. La3 f6 12. Lf8 d6 13. h6 Lf5 14. h7 Ld3 15. exd3 Kf7 16. Df3 Kg6 17. Se2 g1=S 18. h8=T Sh3 19. Th5 Sf4 20. Tb5 Se6 21. Tb2 Db4 22. Th8 Sh6 23. Dg2 Kh5 24. Sc1 g6 25. Lg7 c5 26. Tf8 Sf7 27. Lh8
play all

Henrik Juel: Natch 3.1 did little in half an hour
Stopped at pos. 38 (2018-12-25)
more ...
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Keywords: Anti-Pronkin (TL), Ceriani-Frolkin Theme (L), Unique Proof Game, Non-standard material, Interchange (LT), Promotion (LsT)
Genre: Retro
Computer test: KP: C+ Stelvio 1.0 (14 seconds)
FEN: 1n3R1B/1p3n2/1p1pnpp1/2p4k/1q6/2PP2r1/PRPP2Q1/RNN1KB2
Input: Gerd Wilts, 2009-01-10
Last update: A.Buchanan, 2023-03-20 more...

31 - P1080653
Thierry Le Gleuher
R312 Probleemblad 08/2006

(9+16)
BP in 28,5

Henrik Juel: Natch 3.1 did not find the solution in 4 hours
Although the last move is obvious, testing the first 28.0 moves does help much, because after a couple of hours thousands of solutions appear with [Ta1,Ke1] having moved
The problems shows five hesitating white pawns (a2-a3-a4 instead of a2-a4, etc.)
The author claimed that this was a record in 2006 (2018-12-25)
Moldenhauer: Computerprüfung: C+ Stelvio 1.11 00:01:10 Minute. (hh:mm:ss)
Keine Lösung: BP 27.5, BP 28.0. (2023-04-08)
more ...
comment

Keywords: Unique Proof Game, Promotion (l), Non-standard material (l)
Genre: Retro
FEN: 1q3br1/P2ppppP/n1p1bP1n/1pp2br1/1P6/8/2PP2P1/2KR3k
Input: Gerd Wilts, 2009-01-19
Last update: A.Buchanan, 2021-02-20 more...

32 - P1246053
Nicolas Dupont
FIDE Olympic Tourney 40 Istanbul 2012
ehrende Erwähnung

(13+11) C+
BP in 30,5

1. h4 a5 2. h5 a4 3. h6 a3 4. hxg7 h5 5. c4 Th6 6. c5 Tb6 7. c6 h4 8. cxb7 c5 9. e4 Sc6 10. b8=S c4 11. Sxd7 c3 12. Se5 Lf5 13. Sf3 Lg6 14. e5 f5 15. e6 Sf6 16. g8=S c2 17. Sxe7 cxb1=L 18. Sd5 Le4 19. Sc3 Dd3 20. Sb1 0-0-0 21. e7 h3 22. e8=S h2 23. Sc7 hxg1=L 24. Sb5 Lh2 25. Sg1 Dc2 26. f3 Td3 27. Kf2 Tb3 28. axb3 a2 29. S5a3 axb1=S 30. Ta2 Sc3 31. Sb1
play all

Henrik Juel: Natch 3.1 did nothing in half an hour
Stopped while searching for pos. 1 (2018-12-30)
Moldenhauer: Computerprüfung: Keine Lösung BP 29.5, BP 30.0 mit Stelvio 1.11. (2023-04-24)
comment

Keywords: Unique Proof Game, Pronkin Theme (SSS), Non-standard material
Genre: Retro
Computer test: Stelvio 1.17, 5:05min
FEN: 2k2b2/8/1rn2nb1/5p2/4b3/1Pn2P2/RPqP1KPb/1NBQ1BNR
Input: Gerd Wilts, 2012-08-03
Last update: Reto, 2023-04-18 more...

33 - P1254216
Unto Heinonen
M13) Problemkiste (175) 02/2008

(4+8) C+
ser-s+++++++15
Madrasi

1. Kg6 2. Kf7 3. Ke6 4. Ke5 5. Kd4 6. De8 7. b4 8. b5 9. b6 10. b7 11. b8=T 12. Tb7 13. Th7 14. Th3 15. Tg3 Sxf3+++++++
play all

Arnold Beine: Am Ende ist es ein Matt durch Siebenfachschach. (2022-10-26)
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comment

Keywords: Seriesmover, Madrasi, Move Length Record, Non-standard material (5xd), under-promotion (T), Promotion (T)
Genre: Fairies
Computer test: C+, Jacobi v0.7.5
FEN: 8/8/5q2/3q3K/Q5q1/1Pq2Q2/5q1n/3q1k2
Input: Erich Bartel, 2012-11-24
Last update: A.Buchanan, 2022-10-30 more...

34 - P1254246
Unto Heinonen
K2899) Problemkiste (175) 02/2008

(4+9) C+
ser-s+++++++18
Madrasi

1. b4 2. b5 3. b6 4. b7 5. b8=T 6. Te8 7. Te7 8. Th7 9. Th5 10. Tg5 11. Kd2 12. Kc3 13. Kd4 14. De1 15. Kc4 16. Kb5 17. Kc6 18. Kd6 Sxf5+++++++
play all

Arnold Beine: Am Ende ist es ein Matt durch Siebenfachschach. (2022-10-26)
more ...
comment

Keywords: Seriesmover, Move Length Record, Madrasi, Non-standard material (5xd), Excelsior, under-promotion (T), Promotion (T)
Genre: Fairies
Computer test: C+, Jacobi v0.7.5
FEN: 5q2/3q4/6q1/2q2Q2/5q1n/3q1k2/1P4r1/4K1Q1
Input: Erich Bartel, 2012-11-25
Last update: A.Buchanan, 2022-10-30 more...

35 - P1285805
Nicolas Dupont
Roberto Osorio 55 Jubilee Tourney (RO55JT) 31/12/2012
8. Lob

(14+13) C+
BP in 36,5

1. h4 a5 2. h5 a4 3. h6 a3 4. hxg7 axb2 5. a4 b5 6. Sa3 b1=T 7. a5 Tb4 8. a6 Ta4 9. a7 b4 10. axb8=T b3 11. Tb4 b2 12. Tbh4 b1=T 13. g4 Tbb4 14. Lb2 e5 15. Db1 e4 16. Da2 e3 17. 0-0-0 exf2 18. e4 T8a6 19. Lc4 f1=T 20. e5 Tf5 21. e6 Tfa5 22. e7 f5 23. exf8=T+ Ke7 24. Tf6 f4 25. Tfh6 Sf6 26. g8=T f3 27. Tg5 f2 28. Tgh5 f1=T 29. g5 Tff5 30. g6 Tfb5 31. g7 d5 32. g8=T Le6 33. Tg2 Dg8 34. Tgh2 Dg2 35. d4 Thb8 36. Td3 T8b6 37. Tdh3
play all

Moldenhauer: Computerprüfung: C+ Stelvio 1.11 03:08:27 Stunden. (hh:mm:ss)
Keine Lösung: BP 35.5, BP 36.0. Stelvio 1.17 ist hier viel schneller. (2023-05-01)
more ...
comment

Keywords: Unique Proof Game, Touching Non-Contemporary Siblings, Non-standard material, Promotion (tTttTTtT), Castling
Genre: Retro
Computer test: Stelvio 1.17, 6:30min. Much faster than expected...
FEN: 8/2p1k2p/rr2bn1R/rr1p3R/rrBP3R/N6R/QBP3qR/2K3NR
Input: A.Buchanan, 2014-06-28
Last update: Reto, 2023-04-18 more...

36 - P1312965
Andrey Frolkin
Kislyak Theme: New Developments , p. 6, 2/12/2015

(11+12)
Release the position

Henrik Juel: Solution by author
Retract: -1…Qb7-c8+ -2.a7-a8=B Bc4-a6 -3.a6-a7 Qb1-b7 -4.a5-a6 b2-b1=Q 5.a4-a5 b3-b2 -6.a3-a4 a4xSb3! These 11 single moves were unique ones. -7.Sd4-b3 Bc3-a1 -8.Sb5-d4 Rd1-d3 -9.Sd6-b5 Ra1-d1 -10.Se8-d6 a2-a1=R -11.Sg7-e8 B~ -12.Se8xRg7 Rh7-g7 -13.Qh8-g8 B -14.Kg8-f8 B~ -15.Sd6-e8 B~ … -20.b7-b8=S … -24.b2-b4 b3xRa2! (b3xQa2?) -25.Ra1-a2 … -30.Rf8-a8(b8) Re8-e7 -31.a2-a3! Ra8-e8
The “mobile part” of the upper cage has been released, but the “immovable part” – on the squares e5, e6, f5,
f6, f7, g4, g5, g6, h5 – is yet to be released.
-32.Re8-f8 Ra5-a8 -33.e7-e8=R! ~ -34.d6xSe7 (d6xQe7 is also possible) Sc6-e7+ -35.~ e7-e6. (2015-12-04)
James Malcom: Shortest proof game: 1. Nc3 a5 2. Nd5 a4 3. Nf6+ gxf6 4. e4 Bh6 5. Be2 b5 6. h4 Nc6 7. h5 Ne5 8. d4 Ng6 9. hxg6 Bf4 10. Bh5 Be5 11. Bg5 h6 12. Nf3 hxg5 13. Kd2 Ba6 14. Re1 Bh2 15. e5 Kf8 16. e6 Kg7 17. Re5 g4 18. Rg5 f5 19. Ne5 f6 20. Qf3 Ra7 21. Qa8 fxe5 22. d5 b4 23. Re1 b3 24. Re4 Kh6 25. Rb4 Rh7 26. Rb8 Qf8 27. Kc3 Qg7 28. Rf8 Bc4 29. Rf6 Qf7 30. exf7 e6 31. d6 Ne7 32. Kb4 Bd5 33. Kb5 Rb7+ 34. Ka6 Rb4 35. Qh8 Rc4 36. dxe7 Rc6+ 37. Kb7 Rb6+ 38. Kc8 Bc4 39. Kd8 Bf4 40. Ke8 Bd2 41. Kf8 Bc3 42. Kg8 Rb8+ 43. e8=R Rd8 44. Rf8 Re8 45. a3 Re7 46. Rb8 Bb4 47. Rb5 Ba5 48. Rd5 Bc3 49. Rd1 Bd5 50. Ra1 Bc4 51. Ra2 bxa2 52. b4 Bd4 53. b5 a1=R 54. b6 Rd1 55. b7 Rd3 56. b8=N Ba1 57. Nc6 Ba6 58. Na7 Bb5 59. Nc8 Ba6 60. Nd6 Bb5 61. Ne8 Ba6 62. Kf8 Bc4 63. Qg8 Rg7 64. Nxg7 Bb5 65. Ne8 Bc4 66. Nd6 Bb5 67. Ne4 Ba6 68. Nd2 Bc4 69. Nb3 axb3 70. a4 b2 71. a5 b1=Q 72. a6 Qb7 73. a7 Ba6 74. a8=B Qc8+ (2023-02-11)
comment

Keywords: Kislyak Theme, Non-standard material
Genre: Retro
FEN: B1q2KQ1/2pprP2/b3pRPk/4ppRB/6p1/3r4/2P2PP1/b7
Input: A.Buchanan, 2015-12-04
Last update: A.Buchanan, 2015-12-04 more...

37 - P1362217
Arno Tüngler
F590 Problem Paradise 62, p. 16, 04-07/2013

(9+15) C+
ser-A=>B in 387
Stellung B: wKa6 wLa8 wBf3d3c4f5g7c6a7
sKh8 sTb2e4d5 sLh1e6 sSc1f8 sBa3 (9+9)

1. Ka5-a6 2. b3xc4 3. Lb5-a4 4. La4-d1 5. Ld1-e2 6. Le2-f1 7. Lf1-h3 8. Lh3-g4 9. Lg4-h5 10. Lh5-e8 11. Le8-d7 12. Ld7-c8 13. Lc8xb7 14. Lb7-c8 15. Lc8-d7 16. Ld7-e8 17. Le8-h5 18. Lh5-g4 19. Lg4-h3 20. Lh3-f1 21. Lf1-e2 22. Le2-d1 23. Ld1-a4 24. La4-b5 25. Ka6-a5 26. Ka5-a4 27. Lb5-a6 28. La6-c8 29. Lc8-d7 30. Ld7-e8 31. Le8-h5 32. Lh5-g4 33. Lg4-h3 34. Lh3-f1 35. Lf1-e2 36. Le2-d1 37. Ld1-b3 38. Ka4-b4 39. Kb4-c3 40. Lb3-c2 41. Kc3-d2 42. Kd2-d1 43. Lc2-a4 44. La4-b5 45. Lb5-a6 46. La6-c8 47. Lc8-d7 48. Ld7-e8 49. Le8-h5 50. Lh5-g4 51. Lg4-h3 52. Lh3-f1 53. Lf1-e2 54. Kd1-e1 55. Ke1-f1 56. Le2-d1 57. Ld1-a4 58. La4-b5 59. Lb5-a6 60. La6-c8 61. Lc8-d7 62. Ld7-e8 63. Le8-h5 64. Lh5-g4 65. Lg4-h3 66. Lh3-g2 67. Kf1-g1 68. Kg1-h2 69. Kh2-h3 70. Lg2-f1 71. Lf1-e2 72. Le2-d1 73. Ld1-a4 74. La4-b5 75. Lb5-a6 76. La6-c8 77. Lc8-d7 78. Ld7-e8 79. Le8-h5 80. Lh5-g4 81. Kh3-h4 82. Kh4-h5 83. Lg4-h3 84. Lh3-f1 85. Lf1-e2 86. Le2-d1 87. Ld1-a4 88. La4-b5 89. Lb5-a6 90. La6-c8 91. Lc8-d7 92. Ld7-e8 93. Le8-g6 94. Kh5-g5 95. Kg5-f6 96. Lg6-f7 97. Kf6-e7 98. Ke7-e8 99. Lf7-h5 100. Lh5-g4 101. Lg4-h3 102. Lh3-f1 103. Lf1-e2 104. Le2-d1 105. Ld1-a4 106. La4-b5 107. Lb5-a6 108. La6-c8 109. Lc8-d7 110. Ke8xd8 111. Kd8-e8 112. Ld7-c8 113. Lc8-a6 114. La6-b5 115. Lb5-a4 116. La4-d1 117. Ld1-e2 118. Le2-f1 119. Lf1-h3 120. Lh3-g4 121. Lg4-h5 122. Lh5-f7 123. Ke8-e7 124. Ke7-f6 125. Lf7-g6 126. Kf6-g5 127. Kg5-h5 128. Lg6-e8 129. Le8-d7 130. Ld7-c8 131. Lc8-a6 132. La6-b5 133. Lb5-a4 134. La4-d1 135. Ld1-e2 136. Le2-f1 137. Lf1-h3 138. Lh3-g4 139. Kh5-h4 140. Kh4-h3 141. Lg4-h5 142. Lh5-e8 143. Le8-d7 144. Ld7-c8 145. Lc8-a6 146. La6-b5 147. Lb5-a4 148. La4-d1 149. Ld1-e2 150. Le2-f1 151. Lf1-g2 152. Kh3-h2 153. Kh2-g1 154. Kg1-f1 155. Lg2-h3 156. Lh3-g4 157. Lg4-h5 158. Lh5-e8 159. Le8-d7 160. Ld7-c8 161. Lc8-a6 162. La6-b5 163. Lb5-a4 164. La4-d1 165. Ld1-e2 166. Kf1-e1 167. Ke1-d1 168. Le2-f1 169. Lf1-h3 170. Lh3-g4 171. Lg4-h5 172. Lh5-e8 173. Le8-d7 174. Ld7-c8 175. Lc8-a6 176. La6-b5 177. Lb5-a4 178. La4-c2 179. Kd1-d2 180. Kd2-c3 181. Lc2-b3 182. Kc3-b4 183. Kb4-a4 184. Lb3-d1 185. Ld1-e2 186. Le2-f1 187. Lf1-h3 188. Lh3-g4 189. Lg4-h5 190. Lh5-e8 191. Le8-d7 192. Ld7-c8 193. Lc8-a6 194. La6-b5 195. Ka4-a5 196. Ka5-a6 197. Ka6-b7 198. Kb7xb8 199. Kb8-b7 200. Kb7-a6 201. Ka6-a5 202. Ka5-a4 203. Lb5-a6 204. La6-c8 205. Lc8-d7 206. Ld7-e8 207. Le8-h5 208. Lh5-g4 209. Lg4-h3 210. Lh3-f1 211. Lf1-e2 212. Le2-d1 213. Ld1-b3 214. Ka4-b4 215. Kb4-c3 216. Lb3-c2 217. Kc3-d2 218. Kd2-d1 219. Lc2-a4 220. La4-b5 221. Lb5-a6 222. La6-c8 223. Lc8-d7 224. Ld7-e8 225. Le8-h5 226. Lh5-g4 227. Lg4-h3 228. Lh3-f1 229. Lf1-e2 230. Kd1-e1 231. Ke1-f1 232. Le2-d1 233. Ld1-a4 234. La4-b5 235. Lb5-a6 236. La6-c8 237. Lc8-d7 238. Ld7-e8 239. Le8-h5 240. Lh5-g4 241. Lg4-h3 242. Lh3-g2 243. Kf1-g1 244. Kg1-h2 245. Kh2-h3 246. Lg2-f1 247. Lf1-e2 248. Le2-d1 249. Ld1-a4 250. La4-b5 251. Lb5-a6 252. La6-c8 253. Lc8-d7 254. Ld7-e8 255. Le8-h5 256. Lh5-g4 257. Kh3-h4 258. Kh4-h5 259. Lg4-h3 260. Lh3-f1 261. Lf1-e2 262. Le2-d1 263. Ld1-a4 264. La4-b5 265. Lb5-a6 266. La6-c8 267. Lc8-d7 268. Ld7-e8 269. Le8-g6 270. Kh5-g5 271. Kg5-f6 272. Lg6-f7 273. Kf6-e7 274. Ke7-e8 275. Lf7-h5 276. Lh5-g4 277. Lg4-h3 278. Lh3-f1 279. Lf1-e2 280. Le2-d1 281. Ld1-a4 282. La4-b5 283. Lb5-a6 284. La6-c8 285. Lc8-d7 286. Ke8-d8 287. Kd8xc7 288. Kc7-d8 289. Kd8-e8 290. Ld7-c8 291. Lc8-a6 292. La6-b5 293. Lb5-a4 294. La4-d1 295. Ld1-e2 296. Le2-f1 297. Lf1-h3 298. Lh3-g4 299. Lg4-h5 300. Lh5-f7 301. Ke8-e7 302. Ke7-f6 303. Lf7-g6 304. Kf6-g5 305. Kg5-h5 306. Lg6-e8 307. Le8-d7 308. Ld7-c8 309. Lc8-a6 310. La6-b5 311. Lb5-a4 312. La4-d1 313. Ld1-e2 314. Le2-f1 315. Lf1-h3 316. Lh3-g4 317. Kh5-h4 318. Kh4-h3 319. Lg4-h5 320. Lh5-e8 321. Le8-d7 322. Ld7-c8 323. Lc8-a6 324. La6-b5 325. Lb5-a4 326. La4-d1 327. Ld1-e2 328. Le2-f1 329. Lf1-g2 330. Kh3-h2 331. Kh2-g1 332. Kg1-f1 333. Lg2-h3 334. Lh3-g4 335. Lg4-h5 336. Lh5-e8 337. Le8-d7 338. Ld7-c8 339. Lc8-a6 340. La6-b5 341. Lb5-a4 342. La4-d1 343. Ld1-e2 344. Kf1-e1 345. Ke1-d1 346. Le2-f1 347. Lf1-h3 348. Lh3-g4 349. Lg4-h5 350. Lh5-e8 351. Le8-d7 352. Ld7-c8 353. Lc8-a6 354. La6-b5 355. Lb5-a4 356. La4-c2 357. Kd1-d2 358. Kd2-c3 359. Lc2-b3 360. Kc3-b4 361. Kb4-a4 362. Lb3-d1 363. Ld1-e2 364. Le2-f1 365. Lf1-h3 366. Lh3-g4 367. Lg4-h5 368. Lh5-e8 369. Le8-d7 370. Ld7-c8 371. Lc8-a6 372. La6-b5 373. Ka4-a5 374. Ka5-a6 375. Lb5-a4 376. La4-d1 377. Ld1-e2 378. Le2-f1 379. Lf1-h3 380. Lh3-g4 381. Lg4-h5 382. Lh5-e8 383. Le8-d7 384. Ld7-c8 385. Lc8-b7 386. Lb7-a8 387. h6xg7+
play all

B-Stellung: wKa6 wLa8 wBf3d3c4f5g7c6a7 sKh8 sTb2e4d5 sLh1e6 sSc1f8 sBa3 (9+9)
Moldenhauer: Computerprüfung: C+ Jacobi v0.7.6 beta1 in 36 Min. 55 Sek. PG demolition mode = Brute Force
heuristic mode 7 Sek. (2022-08-28)
comment

Keywords: Seriesmover, A to B, Move Length Record, Non-standard material
Genre: Fairies
FEN: 1b1n1n1k/Pnp3r1/2P1b2P/KB1r1P2/2q1r3/pP1P1P2/1r6/2n4b
Reprints: G41 FIDE Album 2013-2015 2019
Input: Arno Tüngler, 2019-03-08
Last update: Alfred Pfeiffer, 2019-10-09 more...

38 - P1371439
Thierry Le Gleuher
R546 The Problemist 27-6, p. 229, 11/2019

(13+12)
Last 102 single moves?
Duplex

BTM: R: 1. Lc2-b1 Kg1-f1 2. Lb1-c2 Tf1-f2 3. Lc2-b1 Tf2-f3 4. Lb1-c2 Tf3-g3 5. Lc2-b1 Tg3-h3 6. Th3-h2 Th2-h1 7. Lb1-c2 Kh1-g1 8. Lc2-b1 Tg1-f1 9. Lb1-c2 Tf1-f2 10. Lc2-b1 Tf2-f3 11. Lb1-c2 Tf3-g3 12. Tg3-h3 Th3-h2 13. Lc2-b1 Kh2-h1 14. Lb1-c2 Th1-g1 15. Lc2-b1 Kg1-h2 16. Lb1-c2 Th2-h1 17. Lc2-b1 Kh1-g1 18. Lb1-c2 Tg1-f1 19. Lc2-b1 Tf1-f2 20. Lb1-c2 Tf2-f3 21. Tf3-g3 Tg3-h3 22. Lc2-b1 Th3-h2 23. Lb1-c2 Kh2-h1 24. Lc2-b1 Th1-g1 25. Lb1-c2 Kg1-h2 26. Lc2-b1 Th2-h1 27. Lb1-c2 Kh1-g1 28. Lc2-b1 Tg1-f1 29. Lb1-c2 Tf1-f2 30. Tf2-f3 Tf3-g3 31. Lc2-b1 Tg3-h3 32. Lb1-c2 Th3-h2 33. Lc2-b1 Kh2-h1 34. Lb1-c2 Th1-g1 35. Lc2-b1 Tg1-f1 36. Tf1-f2 Lf2-e1 37. Te1-f1 Tf1-g1 38. Lb1-c2 Tg1-h1 39. Lc2-b1 Kh1-h2 40. Lb1-c2 Th2-h3 41. Lc2-b1 Th3-g3 42. Lb1-c2 Lg3-f2 43. Lc2-b1 Tf2-f1 44. Lb1-c2 Tf1-g1 45. Lc2-b1 Kg1-h1 46. Lb1-c2 Th1-h2 47. Lc2-b1 Kh2-g1 48. Lb1-c2 Tg1-h1 49. Lc2-b1 Kh1-h2 50. Lb1-c2 Th2-h3 51. h3-h4 Lh4-g3 52. Lc2-b1
52. ... Tg3-f3 53. Lb1-c2 Tf3-f2 54. Lc2-b1 Tf2-f1 55. Lb1-c2 Tf1-g1 56. Lc2-b1 Kg1-h1 57. Lb1-c2 Th1-h2 58. h2-h3 Th3-g3 59. Lc2-b1 Lg3-h4 60. Lb1-c2 Th8-h3
play all

Editor's comment: Do not be put off by the length of R546: there is a repeated sequence of moves.
James Malcom: Solution? Also, is this an Othoreconstrution? (2023-05-30)
Henrik Juel: Here is the solution from the May 2020 issue (from www.theproblemist.org , which is a treasure of info, althoug I find it hard to navigate)
R546 (Le Gleuher): Retroanalysis: The wPs captured the 4 missing black units.
Thus, wPb4 comes from b2, and (Pa2) promoted to the extra wR on a8 with (Pa7)
letting it pass by switching to the b file (first capture of the 3 missing white units).
(Pb7) must have promoted to a rook on a1 or c1 (second capture). (Ph7) must
have moved onto the g file (third and final capture) in order to be captured. Thus
(Pc7) and (Pe7) promoted to rooks on the c and e files, respectively. It is not
possible to immediately take back a4xb3 or c2xd3. The retro-move e4xf5 is
forbidden since then the bP which promoted on e1 cannot retract to e5. Black can
only move in the southeast cage, while White’s bishop is free to oscillate between
c2 and b1.
Black to move: back 1.Bc2-b1 Kg1-f1 2.Bb1-c2 Rf1-f2 3.Bc2-b1 Rf2-f3
4.Bb1-c2 Rf3-g3 5.Bc2-b1 Rg3-h3 6.Rh3-h2 Rh2-h1 7.Bb1-c2 Kh1-g1 8.Bc2-b1
Rg1-f1 9.Bb1-c2 Rf1-f2 10.Bc2-b1 Rf2-f3 11.Bb1-c2 Rf3-g3 12.Rg3-h3 Rh3-h2
13.Bc2-b1 Kh2-h1 14.Bb1-c2 Rh1-g1 15.Bc2-b1 Kg1-h2 16.Bb1-c2 Rh2-h1
17.Bc2-b1 Kh1-g1 18.Bb1-c2 Rg1-f1 19.Bc2-b1 Rf1-f2 20.Bb1-c2 Rf2-f3
21.Rf3-g3 Rg3-h3 22.Bc2-b1 Rh3-h2 23.Bb1-c2 Kh2-h1 24.Bc2-b1 Rh1-g1
25.Bb1-c2 Kg1-h2 26.Bc2-b1 Rh2-h1 27.Bb1-c2 Kh1-g1 28.Bc2-b1 Rg1-f1
29.Bb1-c2 Rf1-f2 30.Rf2-f3 Rf3-g3 31.Bc2-b1 Rg3-h3 32.Bb1-c2 Rh3-h2
33.Bc2-b1 Kh2-h1 34.Bb1-c2 Rh1-g1 35.Bc2-b1 Rg1-f1 36.Rf1-f2 Bf2-e1
37.Re1-f1 Rf1-g1 38.Bb1-c2 Rg1-h1 39.Bc2-b1 Kh1-h2 40.Bb1-c2 Rh2-h3
41.Bc2-b1 Rh3-g3 42.Bb1-c2 Bg3-f2 43.Bc2-b1 Rf2-f1 44.Bb1-c2 Rf1-g1
45.Bc2-b1 Kg1-h1 46.Bb1-c2 Rh1-h2 47.Bc2-b1 Kh2-g1 48.Bb1-c2 Rg1-h1
49.Bc2-b1 Kh1-h2 50.Bb1-c2 Rh2-h3 51.h3-h4 Bh4-g3 52.Bc2-b1
then 52…Rg3-f3 (or 52...Bg3-h4 53.Bb1-c2 Bh4-g3…) 53.Bb1-c2 Rf3-f2 54.Bc2-b1 Rf2-f1 55.Bb1-c2
Rf1-g1 56.Bc2-b1 Kg1-h1 57.Bb1-c2 Rh1-h2 58.h2-h3 Rh3-g3 59.Bc2-b1 Bg3-h4 60.Bb1-c2 Rh8-h3 etc…
The diagram position is a draw and the last 103 single moves are determined.
White to move: back 1…Kg1-f1 …
51.h3-h4 Bh4-g3 52.Bc2-b1 then the same… Here, there are 99 single moves between the diagram position and the retro-move h3-h4. Of course, trying to insert another manoeuvre in the solution would lead to an overshoot of the 101 single moves, which would be incompatible with the 50 moves rule. Here only 102 last single moves are determined.
So, we have a D25/102, a new record for last single moves for ‘D’ type (Duplex) with 25 pieces (It is also
the overall record for Duplex). With black to move, the same diagram is also a record with 25 pieces (B25/103) (2023-05-30)
comment

Keywords: Last Moves?, Non-standard material, 50 move rule
Genre: Retro
FEN: 8/6p1/8/5PP1/1P3pRP/1p1PPrrr/n2pRrPR/1BNKbk1r
Input: A.Buchanan, 2020-01-05
Last update: Mario Richter, 2023-05-30 more...

39 - P1404288
Viktor Syzonenko
4 Mystetski shakhy , p. 14, 2001

(4+1)
#8

1. Kg6 Kd4 2. Kf5 Kc5 3. Ke5 Kb6 4. Kd6 Ka7 5. La5 Kb8 6. Lc7+ Ka7 7. Kc6 Ka8 8. Kb6#
1. ... Kd6 2. Kf6 Kc5 3. Ke5 usw.
play all

Henrik Juel: many duals (2022-09-12)
comment

Keywords: Non-standard material, Aristocrat, Rex solus (s)
Genre: n#
FEN: 8/7K/8/2kB4/2B5/8/8/4B3
Input: Rainer Staudte, 2022-09-12
Last update: Gunter Jordan, 2022-09-12 more...

40 - P1406369
Mirko Degenkolbe
10274 Seven Chess Notes 203, p. 20, 12/2022
Spezielle ehrende Erwähnung

(5+2) C+
s#7
b)-Tb5

a) 1. Tb6+! Txb6+ 2. Dh5-h6 Ke5 3. Dc8-c3+ Ke4 4. Dh6-h7+ Tg6 5. Df7-f1 Kd5 6. Df1-d3+ Ke6 7. Dh7-g8+ Txg8#
b) 1. Dh5-g6+! Ke5 2. Df7-f6+ Kd5 3. Df6-d8+ Ke5 4. Dg6-g3+ Ke4 5. Dc8-c6+ Kf5 6. Dc6-f3+ Ke6 7. Dd8-c8# Txc8#
play all

(MD1842)
more ...
comment

Keywords: Model mate, Aristocrat, Miniature, Echomatt, Non-standard material, Minimal
Computer test: Gustav 4.1d
FEN: 1rQ1K3/5Q2/3k4/1R5Q/8/8/8/8
Input: Felber, Volker, 2022-12-02
Last update: Felber, Volker, 2023-02-19 more...

41 - P1406684
Udo Degener
Mirko Degenkolbe
12705 feenschach 250 10-12/2022

(5+14)
h#3
0.1.1...
Nullstellung
a) sKg3->d3
b) sSd2->e5
c) sSd2->e1

a) 1. ... Sg5-f3 2. Kxe4 Sxd2+ 3. Ke5 Sh2-f3#
b) 1. ... Sh2-f3 2. Kg4 Sxe5+ 3. Kxg5 Sh4-f3#
c) 1. ... Sh4-f3 2. Kg2 Sxe1+ 3. Kg1 Sg5-f3#
play all

Meeraner, Urform, zyklisch, 3-fach, Themafiguren: wS & wS & wS

Meerane-Thema, Siebente Form (Sauberer Meerane-Zyklus mit drei Elementen) wahrscheinlich eine Erstdarstellung mit diesen Themasteinen: In einem Hilfsmatt mit (mindestens) drei Lösungen führt Weiß den Schlüssel aus. Der Mattzug von Lösung I. wird zum Schlüsselzug von Lösung II. Der Mattzug aus Lösung II. wird zum Schlüssel in Lösung III. Der Mattzug von Lösung III. wird zum Schlüssel von Lösung I. Zyklus AB – BC – CA der weißen Themazüge. Themafiguren: weißer Springer & weißer Springer & weißer Springer. Hier findet die Thematik auf nur einem Themafeld statt (f3).

Schlüsselzüge und Matts auf dem gleichen Feld.

(MD1848)
Henrik Juel: C+ Popeye 4.61 also (2022-12-13)
Henrik Juel: Obviously promoted material, white knight (2022-12-13)
comment

Keywords: Model mate (b+c), Meerane-Thema (7. Form), Non-standard material, x pieces move to one square
Computer test: Gustav 4.1d
FEN: 8/3bKp1q/1p5p/3r2Nn/3pPp1N/4b1k1/3n1p1N/7r
Input: Felber, Volker, 2022-12-13
Last update: Gunter Jordan, 2023-01-17 more...

42 - P1406936
Ilja S. Schumow
405 Wsemirnaja illjustrazija 19/06/1876

(8+12)
#4

1. Se8! droht 2. Sxc7#
1. ... Tab4 2. Txg8 droht 3. Sxc7#
2. ... Taxa6 3. Sd6+ Tb8 4. Tgxb8#,Tbxb8#
1. ... Tcb4 2. Txg8 droht 3. Sxc7#
2. ... Taxa6 3. Sd6+ Tb8 4. Tgxb8#,Tbxb8#
1. ... Tab5 2. Txg8 droht 3. Sxc7#
2. ... Taxa6 3. Sd6+ Tb8 4. Tgxb8#,Tbxb8#
1. ... Tcb5 2. Txg8 droht 3. Sxc7#
2. ... Taxa6 3. Sd6+ Tb8 4. Tgxb8#,Tbxb8#
play all

Henrik Juel: C+ Popeye 4.61, except for the mate duals (2022-12-30)
comment

Keywords: Non-standard material
Genre: n#
FEN: k5b1/p1p1p1N1/P1r1r3/r1r1r3/r1r5/5B1P/5P1K/1R4R1
Input: Rainer Staudte, 2022-12-30
Last update: Gunter Jordan, 2022-12-30 more...

43 - P1408367
Udo Degener
Mirko Degenkolbe
1775 Augsburger Allgemeine 04/03/2023

(11+12)
#2
zwei weiße Damen

1. Sd5! droht 2. Sb6#, 2. Se7#
1. ... Daxd5 2. Da8#
1. ... Sbxd5 2. Dxb7#
1. ... cxd5 2. Dxd7#
1. ... Tdxd5 2. Dh8#
1. ... exd5 2. Lxd7#
1. ... Sfxd5 2. Tf8#
1. ... Lgxd5 2. Tg8#
1. ... Thxd5 2. h8=D,T#
play all

Lösung:
1.Sd5! (droht 2.Sb6 & 2.Se7#)
1. ...D axd5 2.Da8#
1. ...S bxd5 2.Dxb7#
1. ... cxd5 2.Dxd7#
1. ...T dxd5 2.Dh8#
1. ... exd5 2.Lxd7#
1. ...S fxd5 2.Tf8#
1. ...L gxd5 2.Tg8#
1. ...T hxd5 2.h8D,T#

Nach Ausführung des Schlüsselzuges wird der weiße Springer von acht verschiedenen schwarzen Figuren geschlagen. Jede Figur führt ihre Parade von einer anderen Linie aus. Somit ist hier das Maximum erreicht.
Klassischer Zweizüger. Task.

(MD1886)
Henrik Juel: C+ Popeye 4.61, except for double threat (2023-03-19)
comment

Keywords: Obvious promotion (Lg2), Non-standard material
Genre: 2#
Computer test: Gustav 4.1d
FEN: 2k5/1pPp3P/2pPpN2/2N4r/Qn1r1n1p/7B/qQ4bK/5RR1
Input: Felber, Volker, 2023-03-19
Last update: Felber, Volker, 2023-03-19 more...

44 - P1409087
Valery Surkov
F4 7ShahMat 03/09/2021

(5+2)
s#3
3.1...

1. Da5! Dxe8 2. Dd7+ Dxd7 3. Lb7+ Dxb7#

1. Df6! Dxe8 2. Ld7+ Dxd7 3. Db7+ Dxb7#

1. Ddd4! Dxe8 2. Lb7+ Kc7+ 3. Db8+ Dxb8#
play all

SCHRECKE: C+, popeye 4.87 (2023-04-28)
comment

Keywords: Opferwechsel (DL-LD-D), Non-standard material, Aristocrat, Minimal (d), Miniature, Corner mate
Genre: s#
FEN: K1kqR3/Q7/2BQ4/8/8/8/8/8
Input: Rainer Staudte, 2023-04-28
Last update: Gunter Jordan, 2023-04-28 more...

45 - P1409792
Hilmar Ebert
1398 Landeszeitung für die Lüneburger Heide 15/10/1994
Godehard Murkisch gewidmet
zum 20 000. Lebenstag
(am 31. Oktober 1994)

(4+2) C+
#8
3 wS

1. Sc6! Kh2 2. Se5 Kh3 3. Sd3 Kh2 4. Sf2 Kg1 5. Sfg4 Kh1 6. Sh4 Kg1 7. Sf3+ Kh1 8. Sf2#
play all

Das bislang zuglängste Drei-Springer-Mattproblem, in dessen Lösung der wK nicht eingreift.

H. Ebert: "Der große Wagen" als Sternbild der ersten fünf Springerzüge.

more ...
comment

Keywords: Minimal, Miniature, Non-standard material
Genre: n#
Computer test: Juel: Popeye 4.61
FEN: 8/8/8/N2p1N2/3K4/4N2k/8/8
Reprints: 35 Problemschach-Jahrbuch D 1994, p. 22, 1994
Input: Dieter Berlin, 2023-05-18
Last update: Dieter Berlin, 2023-05-18 more...

46 - P1409983
Andrey Frolkin
Werner Keym
1.67 Eigenartige Schachprobleme , p. 196, 2010

(10+2)
Letzter Zug?

R: 1. g3xBh4 h5-h4 and e.g. 2. Kf4-g5 Kh4-h3
play all

Compare P0000999 with more non-standard material
more ...
comment

Keywords: Economy record (Last Move? Type A), Last Move? (BxB), Non-standard material (L), Type A, Type B (a fortiori), Economy record (Last Move? Type B), Minimal
Genre: Retro
FEN: 8/1p5P/6PP/5BK1/6PP/5B1k/6NP/8
Input: A.Buchanan, 2023-05-28
Last update: A.Buchanan, 2023-05-31 more...

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