4 problem(s) found in 3699 milliseconds (displaying 4 problem(s)). [COMMENTDATE>=20200919 AND NOT K='Hilfsrückzüger' AND K='Zwickmühle' AND K='Zwickmühle' AND NOT CPLUS ] [download as LaTeX]

1 - P1265487
Julius Mendheim
67 Aufgaben für Schachspieler 1832

(7+12)
#10

1. Sxe7+ Lxe7! 2. Lxh7+ Kh8 3. Le4+ Kg8 4. Th8+ Kxh8 5. Th2+ Kg8 6. Lh7+ Kh8 7. Ld3+ Kg8 8. Th8+ Kxh8 9. Dh2+ Kg8 10. Dh7#

Anton Baumann: C+ Gustav 4.2a (2022-04-30)
comment

Keywords: Zwickmühle, Zwickmühle
Genre: n#
FEN: q2r1rk1/2p1p1pp/1p1bPp2/1b3N2/8/8/2BQR3/3K3R
Input: Frank Müller, 2013-03-27
Last update: James Malcom, 2022-04-30 more...

2 - P1365086
Ljubomir Ugren
Problem 1967

(3+11)
#38

1. La3+ Ka1 2. Lb2+ Kb1 3. Lxd4+ Kc1 4. Le3+ Kd1 5. Td8+ Ke1 6. Ld2+ Kd1 7. Lb4+ Kc1 8. La3+ Kb1 9. Tb8+ Ka1 10. Lb2+ Kb1 11. Lxe5+ Kc1 12. Lf4+ Kd1 13. Td8+ Ke1 14. Ld2+ Kd1 15. Lb4+ Kc1 16. La3+ Kb1 17. Tb8+ Ka1 18. Lb2+ Kb1 19. Lxf6+ Kc1 20. Lg5+ Kd1 21. Td8+ Ke1 22. Ld2+ Kd1 23. Lb4+ Kc1 24. La3+ Kb1 25. Tb8+ Ka1 26. Lb2+ Kb1 27. Lxg7+ Kc1 28. Lh6+ Kd1 29. Td8+ Ke1 30. Ld2+ Kd1 31. Lb4+ Kc1 32. La3+ Kb1 33. Tb8+ Ka1 34. Le7! c1=D 35. Lf6+ Db2 36. Txb2 e1=D 37. Tb8+ De5 38. Lxe5#

James Malcom: Dualed by move 37, e.g. Rb3 through b8 all work.. (2022-07-12)
Henrik Juel: The solution continues with
34.Le7 c1=D 35.Lf6+ Db2 36.Txb2 e1=D and e.g. 37.Tb8+ De5 38.Lxe5# (2019-06-26, hidden) more ...
comment

Keywords: Promotion (dd), Zwickmühle
Genre: n#
FEN: 1R6/6pK/5p2/4p3/1B1p3n/8/p1p1pp2/1k3b2
Input: Rainer Staudte, 2019-06-26
Last update: James Malcom, 2020-06-05 more...

3 - P1381529
James Malcom
SuperProblem (Website) 05/11/2020

(11+14)
#22

1. 0-0! droht 2. Tf8#
1. ... 0-0-0 2. Txb6+ Kc7 3. Tb7+ Kc8 4. Txb5+ Kc7 5. Tb7+ Kc8 6. Txb4+ Kc7 7. Tb7+ Kc8 8. Txb3+ Kc7 9. Tb7+ Kc8 10. Txb2+ Kc7 11. Tb7+ Kc8 12. Txb1+ Kc7 13. Tb7+ Kc8 14. Txd1 Tg8+ 15. Sg5 Kd8 16. Tdb1 Ta1 17. Txa1 exd5 18. Tb8+ Kc7 19. Txg8 dxe4 20. Tb1 d5 21. Tc8+ Kd6 22. Tb6#

The longest problem with both sides castling

http://superproblem.ru/archive/probl/N/Malcom-22x-2020.gif

Henrik Juel: Popeye 4.61 with 'opt thr 1' found no flaws (2020-11-04, hidden)
James Malcom: I've managed a small extension, so do not computer test this yet. (2020-11-04, hidden)
Olaf Jenkner: Semi-finished problems should not be published. (2020-11-05, hidden)
James Malcom: I agree-this was a severe lapse in my judgement. (2020-11-05, hidden)
A.Buchanan: I think you’re being too hard on yourself, James. It’s hard to know when a problem is “finished”. Unless a position is just thrown together for a discussion, I tend to wait another sleep cycle to see if any more ideas pop up. But it’s not the end of the world if an electronically published problem gets improved a couple of days after the first post (2020-11-05, hidden)
James Malcom: I had had the previous position for a while now, but only yesterday did I see how to improve it. And the new position has now been entered. There are definite duals in the sidelines, but there is a forward, main, defense plan for Black. (2020-11-05, hidden) more ...
comment

Keywords: Zwickmühle, Move Length Record, Superseded by (P1396373), Castling
Genre: n#
FEN: r3k3/1R1pp2N/Bq1pp3/1n1P4/Pp1PP2P/rp2P3/1b6/1b1nK2R
Input: James Malcom, 2020-11-04
Last update: James Malcom, 2021-11-28 more...

4 - P1396373
Xyan Tang
SuperProblem (Website) 27/11/2021

(7+16)
#28

1. 0-0-0! 0-0 2. Tg7+ Kh8 3. Txg6+ Kh7 4. Tg7+ Kh8 5. Txg5+ Kh7 6. Tg7+ Kh8 7. Txg4+ Kh7 8. Tg7+ Kh8 9. Txg3+ Kh7 10. Tg7+ Kh8 11. Txg2+ Kh7 12. Tg7+ Kh8 13. Tg4+ Kh7 14. Le4+ Dg6 15. Lxg6+ fxg6 16. Td7+ Tf7 17. Txf7+ Kg8 18. Tg7+ Kf8 19. Txh4 Lxf2 20. Txh2 Lxe3+ 21. Kd1 b3 22. Th3 Lg5 23. Tf3 Lxf6 24. Ta7 Ke8 25. Txf6 b2 26. Txb6 b1=D+ 27. Txb1 ... 28. Tb8#

The longest problem with both sides castling.

http://superproblem.ru/archive/probl/N/Tang-28x-2021.gif

msterkowiec: Computer-tested but failing to find solution after 1...Ne2+.
All works fine, if for example replace b.p.a4 with wh.p.a4 ( #28 4k2r/5p1R/1p3Bnp/6pq/Pp4pr/4P1n1/5Pbp/R3K1bB ) (2022-11-12)
comment

Keywords: Castling, Move Length Record, Promotion, Zwickmühle
Genre: n#
FEN: 4k2r/5p1R/1p3Bnp/6pq/pp4pr/4P1n1/5Pbp/R3K1bB
Input: James Malcom, 2021-11-28
Last update: James Malcom, 2021-12-19 more...

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