32 problem(s) found in 2948 milliseconds (displaying 32 problem(s)). [COMMENTDATE>=20200919 AND NOT K='Hilfsrückzüger' AND G='n#' AND K='Nicht-Partiesatzmaterial'] [download as LaTeX]
1. axb6ep+ Kb5 2. bxc7+ Tb6 3. 0-0-0 ...
K. Fabel: "Von Interesse ist, dass diese strittige Idee [Beweis des e.p.-Schlagrechts durch spätere Ausführung der Rochade] auch im direkten Mattproblem dargestellt werden kann, vergl. das Diagramm [diese Aufgabe P0004199]. (Vielleicht ist diese Aufgabe noch nicht korrekt doch es wird nicht schwer sein, sie zu verbessern). Falls Schwarz zuletzt Bb6-b5, Tb6-c6 oder Lb6-c7 gezogen hat, ergibt sich, dass Weiss im letzten oder vorletzten Zug den K oder T bewegt haben muss. Falls jedoch K und T noch nicht gezogen haben, muss b7-b5 der letzte Zug gewesen sein. Weiss spielt daher 1. ab6e.p.+ Kb5 2. bc7+ Tb6. Jetzt könnte Weiss mit Dxb6 sofort mattsetzen, aber er muss ja den e.p.-Schlag noch legalisieren. Daher 3. 0-0-0! und Matt erst im 5. Zuge."
Cook: 1. Sxc7+!
1. Lxc7!
K. Fabel: "Von Interesse ist, dass diese strittige Idee [Beweis des e.p.-Schlagrechts durch spätere Ausführung der Rochade] auch im direkten Mattproblem dargestellt werden kann, vergl. das Diagramm [diese Aufgabe P0004199]. (Vielleicht ist diese Aufgabe noch nicht korrekt doch es wird nicht schwer sein, sie zu verbessern). Falls Schwarz zuletzt Bb6-b5, Tb6-c6 oder Lb6-c7 gezogen hat, ergibt sich, dass Weiss im letzten oder vorletzten Zug den K oder T bewegt haben muss. Falls jedoch K und T noch nicht gezogen haben, muss b7-b5 der letzte Zug gewesen sein. Weiss spielt daher 1. ab6e.p.+ Kb5 2. bc7+ Tb6. Jetzt könnte Weiss mit Dxb6 sofort mattsetzen, aber er muss ja den e.p.-Schlag noch legalisieren. Daher 3. 0-0-0! und Matt erst im 5. Zuge."
Cook: 1. Sxc7+!
1. Lxc7!
Keywords: a posteriori (AP) (Type Petrovic), En passant as key, Castling (wg), Non-standard material (TLL)
Genre: Retro, n#
FEN: NQNB4/B1brpp2/k1rp4/Ppp5/Rp6/BP6/RPP5/R3K3
Reprints: (8) Problem 101-102 09/1966
(52) Problem 144-147 12/1971
Input: Gerd Wilts, 1995-06-03
Last update: A.Buchanan, 2022-03-29 more...
Genre: Retro, n#
FEN: NQNB4/B1brpp2/k1rp4/Ppp5/Rp6/BP6/RPP5/R3K3
Reprints: (8) Problem 101-102 09/1966
(52) Problem 144-147 12/1971
Input: Gerd Wilts, 1995-06-03
Last update: A.Buchanan, 2022-03-29 more...
2 - P1134538
Werner Speckmann
2695 Schach 17, p. 268, 09/1957
1. Preis
Wettkampf Westfalen-Berlin
(4+3)
#5
Werner Speckmann
2695 Schach 17, p. 268, 09/1957
1. Preis
Wettkampf Westfalen-Berlin
(4+3)
#5
1. Sg6! Lb4 2. Sge5 Lf8 3. Sd7 Lfc5 4. Sdb6+ Lxb6 5. Sd6#
2. ... La7 3. Sf7 Lac5 4. Sfd6+ Lxd6 5. Sb6#
2. ... La7 3. Sf7 Lac5 4. Sfd6+ Lxd6 5. Sb6#
Keywords: Non-standard material (l)
Genre: n#
FEN: 2k2b2/2P5/2K5/8/2Nb3N/8/8/8
Input: Felber, Volker, 2010-09-11
Last update: Rainer Staudte, 2023-11-18 more...
Genre: n#
FEN: 2k2b2/2P5/2K5/8/2Nb3N/8/8/8
Input: Felber, Volker, 2010-09-11
Last update: Rainer Staudte, 2023-11-18 more...
1. Ddxe5+ Ddxe5+ 2. Dcxe5+ Dcxe5+ 3. Dbxe5+ Dbxe5+ 4. Daxe5+ Dfxe5+ 5. Dfxe5+ Dgxe5+ 6. Dgxe5+ Dhxe5+ 7. Dhxe5+ Tcxe5+ 8. Txe5+ Txe5+ 9. Txe5+ Dxe5+ 10. Dxe5#
mit Zugumstellungen
https://timkr.home.xs4all.nl/chess2/diary_14.htm
Automatische Zugfolge (No-brainer)
PS 23 November: Some readers wondered (I did, too) whether the position of the 10-move no-brainer is legal. It is, says Elkies: "One pawn capture on a side yields three promotable pawns (a6xb7 and c3xd2, with White promoting bbc and Black add); and two piece captures on a side give four more promoting pawns (e6xf7, g6xh7, promote ffhh; f3xe2, h3xg2, promote eegg)."
mit Zugumstellungen
https://timkr.home.xs4all.nl/chess2/diary_14.htm
Automatische Zugfolge (No-brainer)
PS 23 November: Some readers wondered (I did, too) whether the position of the 10-move no-brainer is legal. It is, says Elkies: "One pawn capture on a side yields three promotable pawns (a6xb7 and c3xd2, with White promoting bbc and Black add); and two piece captures on a side give four more promoting pawns (e6xf7, g6xh7, promote ffhh; f3xe2, h3xg2, promote eegg)."
Henrik Juel: The position is indeed legal, but Noam's explanation of seven white and seven black promotions might be clarified
By 'pawn capture' he means PxP, and by 'piece capture' he means that an officer is captured by a pawn
e6xLf7 and g6xLh7 are not both possible here, as the two missing black officers have different square colors, but the latter capture could be g5xLh6 after Black has played Ph7-h5 (2018-11-02)
James Malcom: See the 3 ply longer P1181668. (2021-02-06)
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By 'pawn capture' he means PxP, and by 'piece capture' he means that an officer is captured by a pawn
e6xLf7 and g6xLh7 are not both possible here, as the two missing black officers have different square colors, but the latter capture could be g5xLh6 after Black has played Ph7-h5 (2018-11-02)
James Malcom: See the 3 ply longer P1181668. (2021-02-06)
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Keywords: Aristocrat, No-brainer, Consecutive checks (19), Construction task, Non-standard material
Genre: n#
FEN: 1q2B2q/2q1B1q1/3qkq2/qrr1rRRQ/3QKQ2/2Q3Q1/1Q2n2Q/Q3n3
Input: HBae, 2010-12-04
Last update: James Malcom, 2021-02-07 more...
Genre: n#
FEN: 1q2B2q/2q1B1q1/3qkq2/qrr1rRRQ/3QKQ2/2Q3Q1/1Q2n2Q/Q3n3
Input: HBae, 2010-12-04
Last update: James Malcom, 2021-02-07 more...
1. ... Sdf4+ 2. Texf4+ Se2xf4+ 3. Tdxf4 Se6xf4+ 4. Tbxf4+ Sg2xf4+ 5. Taxf4+ Sg6xf4+ 6. Tf3xf4+ Sh3xf4+ 7. Tgxf4+ Sh5xf4+ 8. Thxf4+ Kxf4+ 9. Dhe5+ Tgxe5+ 10. D1xe5+ Texe5+ 11. D8xe5+ Dcxe5+ 12. Daxe5#
https://timkr.home.xs4all.nl/chess2/diary_14.htm
Automatische Zugfolge (No-brainer) mit Zugumstellungen
https://timkr.home.xs4all.nl/chess2/diary_14.htm
Automatische Zugfolge (No-brainer) mit Zugumstellungen
Henrik Juel: sKf5 is in check from wTf3, so it is Black to move
With 11 white moves to reach mate, the stipulation should read #11, and the conventional numbering is 0... Sf4+ .. 11.Dxe5# (2020-04-19)
Henrik Juel: The missing men are wLLS and sPPP
8+5 promotions have happened, after the needed 3+2 pawn captures, e.g.
wPaxPb, wPcxPd, wPexPf, sPgxL, sPhxL
(The position would still be legal with one white light officer added to the diagram) (2020-04-19)
Henrik Juel: It may be that the 'conventional' numbering would ruin the PDB animation... (2020-04-19)
James Malcom: See the earlier 19 ply P1181666. (2021-02-06)
VL: My version of this problem, stipulated ###1, with wRf3 shifted to e3 was published in my article “Completely unavoidable mate” (The Problemist, v.24, No.6, November 2013; Pr.No.7), where ### denotes a CU-mate introduced in the article. (2021-02-09)
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With 11 white moves to reach mate, the stipulation should read #11, and the conventional numbering is 0... Sf4+ .. 11.Dxe5# (2020-04-19)
Henrik Juel: The missing men are wLLS and sPPP
8+5 promotions have happened, after the needed 3+2 pawn captures, e.g.
wPaxPb, wPcxPd, wPexPf, sPgxL, sPhxL
(The position would still be legal with one white light officer added to the diagram) (2020-04-19)
Henrik Juel: It may be that the 'conventional' numbering would ruin the PDB animation... (2020-04-19)
James Malcom: See the earlier 19 ply P1181666. (2021-02-06)
VL: My version of this problem, stipulated ###1, with wRf3 shifted to e3 was published in my article “Completely unavoidable mate” (The Problemist, v.24, No.6, November 2013; Pr.No.7), where ### denotes a CU-mate introduced in the article. (2021-02-09)
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Keywords: Non-standard material, No-brainer, Consecutive checks (22), Aristocrat, Construction task, Construction record, Move Length Record
Genre: n#
FEN: 4Q2Q/4r3/4n1n1/1bbK1krn/RR1RR1RR/2qn1R1n/4n1nN/Q3Q3
Input: HBae, 2010-12-04
Last update: James Malcom, 2021-02-07 more...
Genre: n#
FEN: 4Q2Q/4r3/4n1n1/1bbK1krn/RR1RR1RR/2qn1R1n/4n1nN/Q3Q3
Input: HBae, 2010-12-04
Last update: James Malcom, 2021-02-07 more...
1. Dd8+ Td6 2. Db7+ Tcc6 3. Da5+ T4c5 4. Db3+ Tdc4 5. Dd2+ Ted4 6. Df3+ Tee4 7. Dg5+ e5 8. Df7+ Te6 9. Dd8+ Tcd6 10. Db7+ Tcc6 11. Da5+ T4c5 12. Db3+ Tdc4 13. Dd2+ Ted4 14. Df3+ e4 15. Dg5+ Te5 16. Df7+ Tde6 17. Dd8+ Tcd6 18. Db7+ Tcc6 19. Da5+ T4c5 20. Db3+ Tdc4 21. Dd2#
Henrik Juel: Several round-trips by the white queens secure the mate (2022-01-15)
Mu-Tsun Tsai: See also P1360655 (2023-06-15)
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Mu-Tsun Tsai: See also P1360655 (2023-06-15)
more ...
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Keywords: Consecutive checks (21), Non-standard material
Genre: n#, Studies
Computer test: C+ Gustav 4.2a
FEN: 8/7Q/2r1p3/2rkr3/2rrr2Q/7K/8/8
Reprints: 806 Magyar Sakkelet 04/1969
Input: Nikolai Beluhov, 2012-09-13
Last update: James Malcom, 2023-06-15 more...
Genre: n#, Studies
Computer test: C+ Gustav 4.2a
FEN: 8/7Q/2r1p3/2rkr3/2rrr2Q/7K/8/8
Reprints: 806 Magyar Sakkelet 04/1969
Input: Nikolai Beluhov, 2012-09-13
Last update: James Malcom, 2023-06-15 more...
1. Kf8 g6 2. Ke7 Dh3 3. Kd6 Dh4 4. Ke6 Dh3 5. Ke7 Dh4 6. Kf8 Dh3 7. Kg7 Dh4 8. Kxg6 Dh3 9. Kxg5 Dh4+ 10. Kxh4 Sh6 (bel) 11. Se5#
10. ... Sc1 (bel) Sd4#
10. ... Sc1 (bel) Sd4#
A.Buchanan: The only nearby white square which can’t be checked profitably is e6 but 3. Ke6? Sg~+! discovered check. So the triangle can only be navigated in one direction (2021-05-09)
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Keywords: Minimal, Non-standard material (l)
Genre: n#
Computer test: C+ Gustav 4.1d
FEN: 8/4K1p1/2N5/6pp/4ppnq/4pkp1/4nrrb/5bb1
Input: Frank Müller, 2013-04-26
Last update: A.Buchanan, 2021-05-09 more...
Genre: n#
Computer test: C+ Gustav 4.1d
FEN: 8/4K1p1/2N5/6pp/4ppnq/4pkp1/4nrrb/5bb1
Input: Frank Müller, 2013-04-26
Last update: A.Buchanan, 2021-05-09 more...
1. Deb5+! Td5 2. Dc7+ Ted6 3. De8+ Tfe6 4. Dg7+ Tff6 5. Dh5+ T4f5 6. Dg3+ Tef4 7. Dhe2+ De4 8. Dxe4+ Tbxe4 9. Dc3+ Tdd4 10. Dbb5+ T6d5 11. Dc7+ Ted6 12. De8+ Tfe6 13. Dg7+ Tff6 14. Dh5+ T4f5 15. Dg3+ Tef4 16. Dhe2+ Tde4 17. Dxe4+ Taxe4 18. Dc3+ Tdd4 19. Db5+ T6d5 20. Dc7+ Ted6 21. De8+ Tfe6 22. Dg7+ Tff6 23. Dh5+ T4f5 24. Dg3+ Tef4 25. De2+ Tde4 26. Dxe4+ Kxe4 27. De3#
Keywords: Non-standard material, Consecutive checks (27)
Genre: n#
Computer test: V. Kotesovec: Gustav 4.0 f, Lösezeit: 22 : 11 : 39 : 23,46 d
FEN: 1n6/K7/Qp1rrr2/4kr2/rr1qrr2/N1Q5/r1P1QP2/1Q6
Input: Vaclav Kotesovec, 2019-02-04
Last update: Mu-Tsun Tsai, 2023-06-15 more...
Genre: n#
Computer test: V. Kotesovec: Gustav 4.0 f, Lösezeit: 22 : 11 : 39 : 23,46 d
FEN: 1n6/K7/Qp1rrr2/4kr2/rr1qrr2/N1Q5/r1P1QP2/1Q6
Input: Vaclav Kotesovec, 2019-02-04
Last update: Mu-Tsun Tsai, 2023-06-15 more...
1. Kd3! droht 2. Ke4 ... 3. Kf3 ... 4. Lxg2#,Lxg4#
1. ... Sh5 2. Txh5 b5 3. e8=T! b4 4. Te6 Sxe5+,S~ 5. Txe5#,Tx~#
1. ... Se6,Sf5 2. Lxe6,Lxf5 b5 3. e8=L! b4 4. Lh5 Lf6,L~ 5. Lhxg4#
1. ... b5 2. e8=L! Se6,Sf5 3. Lxe6,Lxf5 b4 4. Lh5 Lf6,L~ 5. Lhxg4#
https://www.chess.com/forum/view/more-puzzles/a-challenging-mate-in-5-can-you-find-the-first-move?page=1
http://matplus.net/start.php?px=1601166179&app=forum&act=posts&fid=gen&tid=2507
1. ... Sh5 2. Txh5 b5 3. e8=T! b4 4. Te6 Sxe5+,S~ 5. Txe5#,Tx~#
1. ... Se6,Sf5 2. Lxe6,Lxf5 b5 3. e8=L! b4 4. Lh5 Lf6,L~ 5. Lhxg4#
1. ... b5 2. e8=L! Se6,Sf5 3. Lxe6,Lxf5 b4 4. Lh5 Lf6,L~ 5. Lhxg4#
https://www.chess.com/forum/view/more-puzzles/a-challenging-mate-in-5-can-you-find-the-first-move?page=1
http://matplus.net/start.php?px=1601166179&app=forum&act=posts&fid=gen&tid=2507
Henrik Juel: Correct key, but damaged by multiple threats and duals, e.g.
1.Kd3 thr. 2.e8=DTLS,Ke4 (2020-09-27)
James Malcom: Typo fixed. And Henrik, the threats are not the point here. The point here is how the different play of the Black knight changes White's promotions. (2020-09-27)
A.Buchanan: It's a beautiful idea, still looking for its rendering though as the many duals and the obstreperous wL are quite distracting (2020-09-28)
James Malcom: There aren't any duals in full-length variations, though. The extra bishop is indeed annoying, but unfixable so far. (2020-09-28)
A.Buchanan: There are still some trivial duals in the mating move, but yes. This problem is trying to ignore threats: you can see that the computer solution. The solution is much more coherent with "nosh noth" switched on. So when are the cases, Henrik, when you switch those options on? It would be event better if one was able to switch threats on for the 4th move. This underscores that there should be a Popeye option for any white move "noth" is self-selecting, depending upon the number of variations. (2020-09-29)
Henrik Juel: Andrew, I use the Popeye option 'nosh' when the output without them is overwhelmingly large
The 'not' option is tricky, and usually expands the output; in some cases it shows apparent duals that are not real ones, when you apply the rule that dualistic play should be ignored, when it appears after black moves that do not prevent the threat
In the case of multiple threats things get messy, like in this problem, as I recall (2020-09-29)
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1.Kd3 thr. 2.e8=DTLS,Ke4 (2020-09-27)
James Malcom: Typo fixed. And Henrik, the threats are not the point here. The point here is how the different play of the Black knight changes White's promotions. (2020-09-27)
A.Buchanan: It's a beautiful idea, still looking for its rendering though as the many duals and the obstreperous wL are quite distracting (2020-09-28)
James Malcom: There aren't any duals in full-length variations, though. The extra bishop is indeed annoying, but unfixable so far. (2020-09-28)
A.Buchanan: There are still some trivial duals in the mating move, but yes. This problem is trying to ignore threats: you can see that the computer solution. The solution is much more coherent with "nosh noth" switched on. So when are the cases, Henrik, when you switch those options on? It would be event better if one was able to switch threats on for the 4th move. This underscores that there should be a Popeye option for any white move "noth" is self-selecting, depending upon the number of variations. (2020-09-29)
Henrik Juel: Andrew, I use the Popeye option 'nosh' when the output without them is overwhelmingly large
The 'not' option is tricky, and usually expands the output; in some cases it shows apparent duals that are not real ones, when you apply the rule that dualistic play should be ignored, when it appears after black moves that do not prevent the threat
In the case of multiple threats things get messy, like in this problem, as I recall (2020-09-29)
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Keywords: under-promotion (T, L), Changed mates, Non-standard material (L)
Genre: n#
FEN: 2B4R/4P1n1/1p6/4P3/6nb/1P2p2k/2K1Pprp/5B1N
Reprints: MatPlus.net Forum 10/7/2020
Input: James Malcom, 2020-09-27
Last update: James Malcom, 2020-09-29 more...
Genre: n#
FEN: 2B4R/4P1n1/1p6/4P3/6nb/1P2p2k/2K1Pprp/5B1N
Reprints: MatPlus.net Forum 10/7/2020
Input: James Malcom, 2020-09-27
Last update: James Malcom, 2020-09-29 more...
1. Kc4! cxd6 2. Sc3+ Sxc3 3. Dh1+ f3 4. Dxh4+ Tf4 5. Dhh7+ f5 6. Dxb7+ Dxb7 7. Dxb7+ d5+ 8. Dxd5+ Scxd5 9. Sxd5 Sxd5 10. Te3+ Sdxe3+ 11. Dxe3+ Sxe3+ 12. Txe3+ dxe3 13. d3#
ONSTERFELIJKE WOESTHEID-https://timkr.home.xs4all.nl/admag/woest.htm
ONSTERFELIJKE WOESTHEID-https://timkr.home.xs4all.nl/admag/woest.htm
Keywords: Opferminimal, Non-standard material
Genre: n#
FEN: 1q4r1/1bp2pQ1/3Q4/1Kp1pr2/1n1pkp1p/RQ1RN3/nbnP4/QN6
Input: James Malcom, 2020-10-29
Last update: Olaf Jenkner, 2020-11-10 more...
Genre: n#
FEN: 1q4r1/1bp2pQ1/3Q4/1Kp1pr2/1n1pkp1p/RQ1RN3/nbnP4/QN6
Input: James Malcom, 2020-10-29
Last update: Olaf Jenkner, 2020-11-10 more...
a) 1. Th8+! Kxh8 2. Txh3+ Kg8 3. Th8+ Kxh8 4. Txh2+ Kg8 5. Th8+ Kxh8 6. Th1+ Kg8 7. Th8+ Kxh8 8. Th1+ Kg8 9. Th8+ Kxh8 10. Th1+ Kg8 11. Th8+ Kxh8 12. Th1+ Kg8 13. Th8+ Kxh8 14. Th1+ Kg8 15. Th8+ Kxh8 16. Th1+ Kg8 17. Th8+ Kxh8 18. Dh1+ Kg8 19. Dh7+ Kf8 20. Dh8+ Ke7 21. Dxg7+ Kd6,Kd8 22. Dc7#
b) 1. Th8+! Kxh8 2. Txh3+ Kg8 3. Th8+ Kxh8 4. Txh2+ Kg8 5. Th8+ Kxh8 6. Th1+ Kg8 7. Th8+ Kxh8 8. Th1+ Kg8 9. Th8+ Kxh8 10. Th1+ Kg8 11. Th8+ Kxh8 12. Th1+ Kg8 13. Th8+ Kxh8 14. Th1+ Kg8 15. Th8+ Kxh8 16. Th1+ Kg8 17. Th8+ Kxh8 18. Dh1+ Kg8 19. Dh7+ Kf8 20. Dh8+ Ke7 21. Dxg7+ Kd6,Kd8 22. Dc7+ Lxc7#
http://www.bestproblems.it/bppdf/BP2019(complete).pdf
"... details are everything ..."
b) 1. Th8+! Kxh8 2. Txh3+ Kg8 3. Th8+ Kxh8 4. Txh2+ Kg8 5. Th8+ Kxh8 6. Th1+ Kg8 7. Th8+ Kxh8 8. Th1+ Kg8 9. Th8+ Kxh8 10. Th1+ Kg8 11. Th8+ Kxh8 12. Th1+ Kg8 13. Th8+ Kxh8 14. Th1+ Kg8 15. Th8+ Kxh8 16. Th1+ Kg8 17. Th8+ Kxh8 18. Dh1+ Kg8 19. Dh7+ Kf8 20. Dh8+ Ke7 21. Dxg7+ Kd6,Kd8 22. Dc7+ Lxc7#
http://www.bestproblems.it/bppdf/BP2019(complete).pdf
"... details are everything ..."
Henrik Juel: Popeye 4.61 with 'opt thr 0' found no flaws in part a (2020-11-12)
Henrik Juel: ... and with 'opt thr 0 non 0 1' no flaws in part b (2020-11-12)
comment
Henrik Juel: ... and with 'opt thr 0 non 0 1' no flaws in part b (2020-11-12)
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Keywords: Task (Construction), Non-standard material, Räumung and Bahnung, Checking key
Genre: n#
FEN: q3r1k1/6p1/1K2p1P1/3rp3/7R/b4pRn/5R1p/QRRRRRR1
Input: James Malcom, 2020-11-12
Last update: Rainer Staudte, 2020-11-12 more...
Genre: n#
FEN: q3r1k1/6p1/1K2p1P1/3rp3/7R/b4pRn/5R1p/QRRRRRR1
Input: James Malcom, 2020-11-12
Last update: Rainer Staudte, 2020-11-12 more...
11 - P1383157
Mike Curtis
105 Schach , p. 49, 09/2020
Lobende Erwähnung
Corona Kompositionsturnier 2020
(10+6)
#4
Mike Curtis
105 Schach , p. 49, 09/2020
Lobende Erwähnung
Corona Kompositionsturnier 2020
(10+6)
#4
1. Lxf3! Tdxf3 2. Ta1+ Ta3 3. Txa3+ Txa3 4. Txa3#
1. ... Tfxf3 2. Th8+ Tf8 3. Txf8+ Txf8 4. Txf8#
Dieses Problem konkurrierte um den Sonderpreis, aber leider ist der Td1 überflüssig. Die verrückte Diagrammstellung musste jedoch verewigt werden!
1. ... Tfxf3 2. Th8+ Tf8 3. Txf8+ Txf8 4. Txf8#
Dieses Problem konkurrierte um den Sonderpreis, aber leider ist der Td1 überflüssig. Die verrückte Diagrammstellung musste jedoch verewigt werden!
Keywords: Capture key, Non-standard material
Genre: n#
FEN: k7/3R1r1R/8/1R1R1r1B/8/1r1r1r1R/8/1R1R1R1K
Input: Rainer Staudte, 2020-12-20
Last update: Rainer Staudte, 2020-12-20 more...
Genre: n#
FEN: k7/3R1r1R/8/1R1R1r1B/8/1r1r1r1R/8/1R1R1R1K
Input: Rainer Staudte, 2020-12-20
Last update: Rainer Staudte, 2020-12-20 more...
12 - P1383163
Collin Colbow
160 Schach , p. 50, 09/2020
Lobende Erwähnung
Corona Kompositionsturnier 2020
(4+1) C+
#5
Collin Colbow
160 Schach , p. 50, 09/2020
Lobende Erwähnung
Corona Kompositionsturnier 2020
(4+1) C+
#5
1. Lh5 Kc8 2. Kc6 Kd8 3. Lh3 Ke7 4. Lg7 Kd8 5. Lf6#
2. ... Kb8 3. Le5+ Ka7 4. Le2 Ka8 5. Kb6#
3. ... Kc8 4. Lh3+ Kd8 5. Lf6#
2. ... Kb8 3. Le5+ Ka7 4. Le2 Ka8 5. Kb6#
3. ... Kc8 4. Lh3+ Kd8 5. Lf6#
Keywords: Non-standard material, Rex solus (s), Aristocrat
Genre: n#
Computer test: Popeye 4.61
FEN: 3k4/8/3K4/8/8/2B5/6B1/3B4
Input: Rainer Staudte, 2020-12-20
Last update: Alfred Pfeiffer, 2020-12-21 more...
Genre: n#
Computer test: Popeye 4.61
FEN: 3k4/8/3K4/8/8/2B5/6B1/3B4
Input: Rainer Staudte, 2020-12-20
Last update: Alfred Pfeiffer, 2020-12-21 more...
1. Kc6! Kd4 2. Sc5 Ke5 3. Se4 Kd4 4. Sf2 Ke5 5. Sh3 Kd4 6. Shf4 Ke5 7. Sg2 Kd4 8. Se1 Ke5 9. Sf3#
Keywords: Non-standard material, Rex solus (s), Stalemate dissolution
Genre: n#
Computer test: Gustav 4.1d, Brute Force
FEN: 8/1N4N1/8/2KNk3/8/3P4/8/8
Input: Rainer Staudte, 2020-12-23
Last update: Alfred Pfeiffer, 2020-12-23 more...
Genre: n#
Computer test: Gustav 4.1d, Brute Force
FEN: 8/1N4N1/8/2KNk3/8/3P4/8/8
Input: Rainer Staudte, 2020-12-23
Last update: Alfred Pfeiffer, 2020-12-23 more...
1. Lb7+! Kxb7 2. Lxc6+ Kc8 3. Lb7+ Kxb7 4. Lxd5+ Kc8 5. Lb7+ Kxb7 6. Lxe4+ Kc8 7. Lb7+ Kxb7 8. Lxf3+ Kc8 9. Lb7+ Kxb7 10. Lxg2+ Kc8 11. Lb7+ Kxb7 12. Dh1+ Kc8 13. Da8+ Sb8 14. Dxb8+ Kd7 15. Db5+ Kc8 16. Da6+ Kd7 17. Dc6+ Kc8 18. Lxd6+ Dc7 19. Dxc7#
Reprint: http://www.jurajlorinc.com/chess/or27we2.htm#uloha3
Reprint: http://www.jurajlorinc.com/chess/or27we2.htm#uloha3
Keywords: Non-standard material, Checking key, Flight giving sacrifice key, Perpetual check, Sacrifice of white pieces, Line opening, x pieces move to one square (6 on b7), Switchback (k), corner to corner (D)
Genre: n#
Computer test: Gustav 4.1d
FEN: B1krN1KQ/p1Bnq3/2pb4/3pPP2/BN2n3/5p2/B5p1/1B1B3B
Input: James Malcom, 2021-04-07
Last update: Arnold Beine, 2021-04-07 more...
Genre: n#
Computer test: Gustav 4.1d
FEN: B1krN1KQ/p1Bnq3/2pb4/3pPP2/BN2n3/5p2/B5p1/1B1B3B
Input: James Malcom, 2021-04-07
Last update: Arnold Beine, 2021-04-07 more...
15 - P1391114
Gerard Johan Bouma
Tim Krabbé's Website #102 17/03/2001
Gewidmet Tim Krabbe
(3+4)
#5
b) sBa7->g7
Gerard Johan Bouma
Tim Krabbé's Website #102 17/03/2001
Gewidmet Tim Krabbe
(3+4)
#5
b) sBa7->g7
a) 1. Dg7? 0-0-0!
1. Dc5! Kd7,Kd8 2. Dd6+ Kc8 3. Dc6+ Kd8 4. Kf7 ... 5. Lf7#
b) 1. Dc5? Kd7,Kd8 2. Dd6+ Kc8 3. Dc6+ Kd8 4. Kf7 Ta7+!
1. Dxg7! Kd8 2. Ld6 Ta7 3. Dxa7 and mate in two
https://timkr.home.xs4all.nl/chess2/diary_6.htm
KrabbéProudly presenting: a problem, dedicated to me, by the prominent Dutch composer Gerard Bouma, who has already often been very helpful when I wanted to illustrate the problem art in these pages.
Trying to solve these elegant miniature twins gave me a pleasure that I invite the reader to share. I did solve them (found the ways to mate Black in time), but I confess that I missed the wittiest point of the whole thing.
In a), 1.Qg7 (Kd8 2.Bd6 etc.) is defeated by O-O-O! Therefore: 1.Qc5 Kd7 2.Qd6+ Kc8 3.Qc6+ Kd8 4.Kf7 and 5.Be7 mate
In b), this doesn't work because Black has 4...Ra7+ Now, however, White can play 1.Qxg7 There follows 1...Kd8 2.Bd6 Ra7 3.Qxa7 and mate in two more moves. But can't Black castle here? That is what this problem is really about. He can't. If he could, his last move should have been with the Pf6. If it was f7-f6, then the white King, in its march to g8, would necessitate the black King to have been away from e8 temporarily. If the Pf6 captured to f6 in its last move (this is what I forgot), then the Bf8 must be a promoted Pf7 - also proving the black King must at some time have moved. No castling.
Thanks to those readers who sent me solutions - most of them entirely correct.
1. Dc5! Kd7,Kd8 2. Dd6+ Kc8 3. Dc6+ Kd8 4. Kf7 ... 5. Lf7#
b) 1. Dc5? Kd7,Kd8 2. Dd6+ Kc8 3. Dc6+ Kd8 4. Kf7 Ta7+!
1. Dxg7! Kd8 2. Ld6 Ta7 3. Dxa7 and mate in two
https://timkr.home.xs4all.nl/chess2/diary_6.htm
KrabbéProudly presenting: a problem, dedicated to me, by the prominent Dutch composer Gerard Bouma, who has already often been very helpful when I wanted to illustrate the problem art in these pages.
Trying to solve these elegant miniature twins gave me a pleasure that I invite the reader to share. I did solve them (found the ways to mate Black in time), but I confess that I missed the wittiest point of the whole thing.
In a), 1.Qg7 (Kd8 2.Bd6 etc.) is defeated by O-O-O! Therefore: 1.Qc5 Kd7 2.Qd6+ Kc8 3.Qc6+ Kd8 4.Kf7 and 5.Be7 mate
In b), this doesn't work because Black has 4...Ra7+ Now, however, White can play 1.Qxg7 There follows 1...Kd8 2.Bd6 Ra7 3.Qxa7 and mate in two more moves. But can't Black castle here? That is what this problem is really about. He can't. If he could, his last move should have been with the Pf6. If it was f7-f6, then the white King, in its march to g8, would necessitate the black King to have been away from e8 temporarily. If the Pf6 captured to f6 in its last move (this is what I forgot), then the Bf8 must be a promoted Pf7 - also proving the black King must at some time have moved. No castling.
Thanks to those readers who sent me solutions - most of them entirely correct.
Duplicate Diagram: P1169710
A.Buchanan: See the duplicate diagram. Interesting if such a complementary twin only arrived 8 years later. (2021-06-27)
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Keywords: Castling, Cant Castler, Miniature, Non-standard material (Retro play dependent)
Genre: n#, Retro
FEN: r3kBK1/p7/5p2/8/8/8/8/6Q1
Input: James Malcom, 2021-06-26
Last update: A.Buchanan, 2024-02-26 more...
Genre: n#, Retro
FEN: r3kBK1/p7/5p2/8/8/8/8/6Q1
Input: James Malcom, 2021-06-26
Last update: A.Buchanan, 2024-02-26 more...
1. Sd4! Kxd4 2. Tc3 Kd5 3. Sb2 Kd4 4. Td3#
1. ... Kd3 2. Sa5 Kxd4 3. Tc3 Kd5 4. Td3# 2. ... Ke3 3. Sab3 Kd3 4. Tc3#
1. ... Kd3 2. Sa5 Kxd4 3. Tc3 Kd5 4. Td3# 2. ... Ke3 3. Sab3 Kd3 4. Tc3#
Keywords: Non-standard material, Aristocrat, Miniature, Flight giving sacrifice key, Rex solus
Genre: n#
Computer test: Juel: Popeye 4.61
FEN: 8/1N6/8/1N3K2/N7/4k3/2R5/8
Reprints: 453 Problemschach-Jahrbuch 1995 D , p. 180, 1996
Input: Rainer Staudte, 2022-01-02
Last update: Dieter Berlin, 2023-06-18 more...
Genre: n#
Computer test: Juel: Popeye 4.61
FEN: 8/1N6/8/1N3K2/N7/4k3/2R5/8
Reprints: 453 Problemschach-Jahrbuch 1995 D , p. 180, 1996
Input: Rainer Staudte, 2022-01-02
Last update: Dieter Berlin, 2023-06-18 more...
1. De6 D2g3 2. Da6+ Kg1 3. Dd1+ Kg2 4. Dxf3+ Kxf3 5. Dd3+ Kg2 6. Dgxg3+ Kh1 7. Db1#
Keywords: Non-standard material, Aristocrat, Miniature
Genre: n#
FEN: 3Q2K1/4Q1Q1/8/8/8/5q2/5q2/5k2
Input: Rainer Staudte, 2022-06-05
Last update: Rainer Staudte, 2022-06-05 more...
Genre: n#
FEN: 3Q2K1/4Q1Q1/8/8/8/5q2/5q2/5k2
Input: Rainer Staudte, 2022-06-05
Last update: Rainer Staudte, 2022-06-05 more...
1. 0-0-0+! Kh2 2. Dg1+ Kh3 3. Td3+ Kh4 4. Td4+ Kh3 5. De3+ Kh2 6. Th4+ Kg2 7. Tg4+ Kf1 8. Tg1#
7. ... Kh1 8. Dg1#
7. ... Kh2 8. Dxh6#
Matts auf dem gleichen Feld (g1).
Die sDa8, der sTh8, der sTa7 und der sBh7 sind entbehrlich. Es entsteht eine Miniatur ohne Umwandlungsfiguren.
7. ... Kh1 8. Dg1#
7. ... Kh2 8. Dxh6#
Matts auf dem gleichen Feld (g1).
Die sDa8, der sTh8, der sTa7 und der sBh7 sind entbehrlich. Es entsteht eine Miniatur ohne Umwandlungsfiguren.
Henrik Juel: C+ Popeye 4.61 (2022-06-12)
Henrik Juel: sBh7 cannot be removed, but sBh7 can, I think (2022-06-12)
comment
Henrik Juel: sBh7 cannot be removed, but sBh7 can, I think (2022-06-12)
comment
Keywords: Perpetual check, Corner mate, Non-standard material, Castling key, Switchback (k), Checking key, x pieces move to one square, Model mate (Gnaden-)
Genre: n#
FEN: q6r/rr4Qp/7p/8/8/8/q7/R3K2k
Input: Gunter Jordan, 2022-06-12
Last update: Gunter Jordan, 2022-06-12 more...
Genre: n#
FEN: q6r/rr4Qp/7p/8/8/8/q7/R3K2k
Input: Gunter Jordan, 2022-06-12
Last update: Gunter Jordan, 2022-06-12 more...
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.
1. ... Kd6 2. Kf6 Kc5 3. Ke5 usw.
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...
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...
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#
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#
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...
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...
21 - 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
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#
Das bislang zuglängste Drei-Springer-Mattproblem, in dessen Lösung der wK nicht eingreift.
H. Ebert: "Der große Wagen" als Sternbild der ersten fünf Springerzüge.
Das bislang zuglängste Drei-Springer-Mattproblem, in dessen Lösung der wK nicht eingreift.
H. Ebert: "Der große Wagen" als Sternbild der ersten fünf Springerzüge.
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...
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...
1. Sac3! Kc5 2. Sa8 Kd4 3. Sac7 Kc5 4. Se6#
Keywords: Non-standard material (SSS), Miniature, Rex solus (s)
Genre: n#
FEN: 5K2/8/1N6/3NN3/N1Nk4/8/8/8
Input: Rainer Staudte, 2023-11-18
Last update: Gunter Jordan, 2023-11-18 more...
Genre: n#
FEN: 5K2/8/1N6/3NN3/N1Nk4/8/8/8
Input: Rainer Staudte, 2023-11-18
Last update: Gunter Jordan, 2023-11-18 more...
23 - P1413568
Vladimir Kozhakin
Albert S. Schachnasarjan
908 Kudesnik 63 25/07/2000
Thematurnier
Lob
(5+2)
#4
Vladimir Kozhakin
Albert S. Schachnasarjan
908 Kudesnik 63 25/07/2000
Thematurnier
Lob
(5+2)
#4
1. Sf4! Ke4xf4 2. Dh4+ Sg4 3. Kd3 Ke5 4. Dg5#
1. ... Ke4xd4 2. Db4+ Sc4 3. Kf3 Ke5 4. Dc5#
1. ... Ke4xd4 2. Db4+ Sc4 3. Kf3 Ke5 4. Dc5#
Keywords: Non-standard material (S), Sacrifice key (S,S), Miniature, Minimal (s), Symmetrical position (nach Schlüssel)
Genre: n#
FEN: 4N3/4Q3/8/3Nn3/3Nk3/8/4K3/8
Input: Rainer Staudte, 2023-11-18
Last update: Gunter Jordan, 2023-11-18 more...
Genre: n#
FEN: 4N3/4Q3/8/3Nn3/3Nk3/8/4K3/8
Input: Rainer Staudte, 2023-11-18
Last update: Gunter Jordan, 2023-11-18 more...
1. Ke5! Kxf1 2. Sf4 Kg1 3. Th3 Kf1 4. Th1#
1. ... Kxd1 2. Sd4 Kc1 3. Tb3 Kd1 4. Tb1#
1. ... Kxd1 2. Sd4 Kc1 3. Tb3 Kd1 4. Tb1#
Keywords: Non-standard material (S), Sacrifice key (S,S), Minimal (b), Miniature, Variation Asymmetry
Genre: n#
FEN: 8/8/4p3/8/4K3/4R3/4N3/3NkN2
Input: Rainer Staudte, 2023-11-18
Last update: Gunter Jordan, 2023-11-18 more...
Genre: n#
FEN: 8/8/4p3/8/4K3/4R3/4N3/3NkN2
Input: Rainer Staudte, 2023-11-18
Last update: Gunter Jordan, 2023-11-18 more...
25 - P1413570
Aleksandr Oleynik
901 Kudesnik 63 25/07/2000
Thematurnier
1. Ehrende Erwähnung
(4+2)
#4
Aleksandr Oleynik
901 Kudesnik 63 25/07/2000
Thematurnier
1. Ehrende Erwähnung
(4+2)
#4
1. Sc5! droht 2. Sd3#
1. ... Kb2 2. Sd3+ Ka1 3. Sd4 c1=D,c1=T 4. Sb3#
3. ... c1=S 4. Sc2#
2. ... Ka3 3. Sd4 c1=D,c1=T 4. Sdb5#
1. ... Kb2 2. Sd3+ Ka1 3. Sd4 c1=D,c1=T 4. Sb3#
3. ... c1=S 4. Sc2#
2. ... Ka3 3. Sd4 c1=D,c1=T 4. Sdb5#
Keywords: Non-standard material (S), Minimal, Miniature
Genre: n#
FEN: 8/8/8/8/N1K5/2N2N2/2p5/2k5
Input: Rainer Staudte, 2023-11-18
Last update: Rainer Staudte, 2023-11-18 more...
Genre: n#
FEN: 8/8/8/8/N1K5/2N2N2/2p5/2k5
Input: Rainer Staudte, 2023-11-18
Last update: Rainer Staudte, 2023-11-18 more...
26 - P1413571
Wiktor Wolkow
Vladimir Kozhakin
907 Kudesnik 63 25/07/2000
Thematurnier
2. Ehrende Erwähnung
(5+1)
#4
Wiktor Wolkow
Vladimir Kozhakin
907 Kudesnik 63 25/07/2000
Thematurnier
2. Ehrende Erwähnung
(5+1)
#4
1. Sbc6! Kc4 2. Sd2+ Kc3 3. Kd1 Kd3 4. Tb3#
2. ... Kc5 3. Se4+ Kc4 4. Tb4#
1. ... Kd6 2. Sg5 Kc5 3. Se4+ Kc4 4. Tb4#
2. ... Kc5 3. Se4+ Kc4 4. Tb4#
1. ... Kd6 2. Sg5 Kc5 3. Se4+ Kc4 4. Tb4#
Keywords: Non-standard material (S)
Genre: n#
FEN: 1N6/1R2N3/8/2k5/8/5N2/4K3/8
Input: Rainer Staudte, 2023-11-18
Last update: Rainer Staudte, 2023-11-18 more...
Genre: n#
FEN: 1N6/1R2N3/8/2k5/8/5N2/4K3/8
Input: Rainer Staudte, 2023-11-18
Last update: Rainer Staudte, 2023-11-18 more...
1. Sb3! Ka2 2. Sfd2 Ka3 3. Sc2+ Ka2 4. Sc1#
3. ... Ka4 4. Sc3#
3. ... Ka4 4. Sc3#
Keywords: Non-standard material (SS), Miniature
Genre: n#
FEN: 8/8/8/8/8/8/8/1kNNNN1K
Input: Rainer Staudte, 2023-11-19
Last update: Rainer Staudte, 2023-11-19 more...
Genre: n#
FEN: 8/8/8/8/8/8/8/1kNNNN1K
Input: Rainer Staudte, 2023-11-19
Last update: Rainer Staudte, 2023-11-19 more...
28 - P1413582
Edgar D. Holladay
2150 U.S. Problem Bulletin 75 01/1991
(5+1)
#4
b)verschiebe alles ein Feld nach links oben
Edgar D. Holladay
2150 U.S. Problem Bulletin 75 01/1991
(5+1)
#4
b)verschiebe alles ein Feld nach links oben
a) 1. Se5! Kb2 2. Se4 Kb1 3. Sd3 Ka2 4. Sc3#
2. ... Ka2 3. Sd3 Kb1 4. Sc3#
2. ... Kc1 3. Sd3 Kb1 4. Sc3#
3. ... Kd1 4. Sc3#,Sf2#
b) 1. Sd6! Ka3 2. Sa1 Kb4 3. Sc2+ Ka5 4. Sc4#
2. ... Kb2 3. Sc4+ Kxa1 4. Sb3#
3. ... Kc1 4. S5b3#,Sd3#
2. ... Ka2 3. Sd3 Kb1 4. Sc3#
2. ... Kc1 3. Sd3 Kb1 4. Sc3#
3. ... Kd1 4. Sc3#,Sf2#
b) 1. Sd6! Ka3 2. Sa1 Kb4 3. Sc2+ Ka5 4. Sc4#
2. ... Kb2 3. Sc4+ Kxa1 4. Sb3#
3. ... Kc1 4. S5b3#,Sd3#
Keywords: Non-standard material (SS), Miniature, Aristocrat
Genre: n#
FEN: 8/8/8/8/2NN4/2k1K3/2NN4/8
Input: Rainer Staudte, 2023-11-19
Last update: Rainer Staudte, 2023-11-19 more...
Genre: n#
FEN: 8/8/8/8/2NN4/2k1K3/2NN4/8
Input: Rainer Staudte, 2023-11-19
Last update: Rainer Staudte, 2023-11-19 more...
1. Sc5! Kb8 2. Ka6 Kc8 3. S7e6 Kb8 4. Sd7+ Kc8 5. Sab6#
4. ... Kxa8 5. Sc7#
4. ... Kxa8 5. Sc7#
Keywords: Non-standard material (S)
Genre: n#
FEN: N7/k1NN4/8/1K6/8/8/8/8
Input: Rainer Staudte, 2023-11-19
Last update: Rainer Staudte, 2023-11-19 more...
Genre: n#
FEN: N7/k1NN4/8/1K6/8/8/8/8
Input: Rainer Staudte, 2023-11-19
Last update: Rainer Staudte, 2023-11-19 more...
1. Kf6! Kf8 2. Se6+ Kg8 3. Kg6 Kh8 4. Sf7+ Kg8 5. Sf6#
2. ... Ke8 3. Sd6#
1. ... Kd8 2. Se6+ Kc8 3. Sd6+ Kb8 4. Sc6+ Ka8 5. Sc7#
2. ... Ke8 3. Sd6#
2. ... Ke8 3. Sd6#
1. ... Kd8 2. Se6+ Kc8 3. Sd6+ Kb8 4. Sc6+ Ka8 5. Sc7#
2. ... Ke8 3. Sd6#
Keywords: Non-standard material
Genre: n#
FEN: 4k3/6K1/8/4N3/4NN2/8/8/8
Input: Rainer Staudte, 2024-01-25
Last update: Rainer Staudte, 2024-01-25 more...
Genre: n#
FEN: 4k3/6K1/8/4N3/4NN2/8/8/8
Input: Rainer Staudte, 2024-01-25
Last update: Rainer Staudte, 2024-01-25 more...
1. Se3! Kxe3 2. 0-0-0 Kf3 3. Tg1 Ke3 4. Tg3#
Keywords: Non-standard material (SS), Aristocrat, Miniature, Rex solus (s)
Genre: n#
FEN: 8/8/8/1N6/6N1/2Nk3N/8/R3K3
Input: Rainer Staudte, 2024-04-17
Last update: Gunter Jordan, 2024-04-17 more...
Genre: n#
FEN: 8/8/8/1N6/6N1/2Nk3N/8/R3K3
Input: Rainer Staudte, 2024-04-17
Last update: Gunter Jordan, 2024-04-17 more...
1. Sf3+ Ke2 2. Kg2 Ke3 3. Kg3 Ke2 4. Kf4 Kf1 5. Ke3 Kg2 6. Sd2 Kg1 7. Kf3 Kh2 8. Sg3 Kg1 9. Se2+ Kh2 10. Sf1#
6. ... Kh2 7. Kf3 Kg1 8. Sg3 Kh2 9. Sdf1+ Kg1 10. Sh3#
6. ... Kh2 7. Kf3 Kg1 8. Sg3 Kh2 9. Sdf1+ Kg1 10. Sh3#
Keywords: Non-standard material (S), Rex solus (s), Aristocrat
Genre: n#
FEN: 8/8/8/8/7N/8/5N2/4k1KN
Input: Rainer Staudte, 2024-04-17
Last update: Gunter Jordan, 2024-04-17 more...
Genre: n#
FEN: 8/8/8/8/7N/8/5N2/4k1KN
Input: Rainer Staudte, 2024-04-17
Last update: Gunter Jordan, 2024-04-17 more...
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https://pdb.dieschwalbe.de/search.jsp?expression=COMMENTDATE%3E%3D20200919+AND+NOT+K%3D%27Hilfsr%C3%BCckz%C3%BCger%27+AND+G%3D%27n%23%27+AND+K%3D%27Nicht-Partiesatzmaterial%27
The problems of this query have been registered by the following contributors:
Gerd Wilts (1)Felber, Volker (1)
HBae (2)
Nikolai Beluhov (1)
Frank Müller (1)
Vaclav Kotesovec (1)
James Malcom (5)
Rainer Staudte (18)
Gunter Jordan (1)
Dieter Berlin (1)
A.Buchanan: The retro logic is fine, but forward play is savagely cooked. I wonder about changing wSc8 to sS. The retro stuff still works OK, indeed sSc8 is a fourth thematic unit to retract in the try. Ignoring proof of ep legality, there is a unique #4 beginning with ep, and no #5. Promising: but when can we interpolate w000? Any solution must begin 1. axb6ep+ Kb5. There are now numerous #4, but none include w000, so I think we must stick with the still unique line beginning 2. Dxc8 thr 3. 0-0-0. There are 3 black defenses to refute this. 2. ... Txb6,axb3,d5. So maybe #6 needed for White to prevail? (2022-03-28)
A.Buchanan: But if we shift to #6 then 1. Sxc7!,Qxc8+! mate without ep. Can anyone retrieve the original diagram for this one, please? (2022-03-28)
Mario Richter: The position here is identical to the original diagram, but it should be regarded more as a schematic example than a "real problem". Fabel in his quote above: "... perhaps the problem is still not correct, but it should be easy to improve it ..." (2022-03-28)
Henrik Juel: unfortunately K. Fabel forgot to give the easy correction... (2022-03-28)
A.Buchanan: Thanks for this. Valery Liskovetz, an AP expert, was kind enough to send a pdf of the relevant Problem issue, so I can confirm. It's easy enough to remove the two cooks (e.g. sTc8) but the difficulty is in validation of the intended solution. Is there any "exact" option in Popeye that forces the solution to include a waiting move? The actual solution might be expected to be included in that set. (2022-03-29)
Henrik Juel: Yes, Andrew
'stip exact-#5' would disregard #4 as a solution, I believe (2022-03-29)
A.Buchanan: Even with the "exact", it's still very complicated to investigate. I think this kind of problem requires an engine feature to disallow any mate or pat if the specified castling has not been executed. Gazing at the 20,000 lines of output, I don't think sTc8 works as 1. axb6ep+ Kb5 2. Qb7 bxa3! threatens axb2+ after castling. I wonder if the board might be flipped left-right except for wK, but I haven't explored this. (2022-05-31)
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