Die Schwalbe

5 problem(s) found in 1953 milliseconds (displaying 5 problem(s)). [COMMENTDATE>=20200919 AND NOT K='Hilfsrückzüger' AND K='Rochade im Retrospiel']

1 - P0000050
Andriy Frolkin
(T) Die Schwalbe 102 12/1986
P0000050
(13+13)
Vor mindestens 50 Einzelzügen mußte rochiert werden!
R: 1. ... La2-b1 2. Dh7-g8 Lb1-a2 3. Kg8-h8 La2-b1 4. Kf7-g8 Lb1-a2 5. Ke8-f7 La2-b1 6. Kd8-e8 Lb1-a2 7. Kc7-d8 La2-b1 8. Kb6-c7 Lb1-a2 9. Kc5-b6 La2-b1 10. Kd4-c5 Lb1-a2 11. Ke4-d4 La2-b1 12. Kf3-e4 Lb1-a2 13. Kg4-f3 La2-b1 14. Kh3-g4 Lb1-a2 15. Kh2-h3 La2-b1 16. Kg1-h2 Lb1-a2 17. h2xTg3 Th3-g3 18. Dg8-h7 Th8-h3 19. Sg3-h1 h7xTg6 20. Tg5-g6 La2-b1 21. Ta5-g5 Lb1-a2 22. Ta2-a5 f5-f4 23. Tb2-a2 La2-b1 24. Tb1-b2 f6-f5 25. Tf1-b1 Lb1-a2 26. 0-0
play all play one stop play next play all
James Malcom: It seems to me that this masterful problem is cooked, because the final position is illegal?! (2020-11-07)
Henrik Juel: The animation does yield an illegal position (with wD enclosed on g8)
I believe that the retroplay is incorrect
It gives the uncastling earlier than stipulated (2020-11-07)
James Malcom: Yes, the retorplay is actually 49 moves, not 50-I based it on han's now hidden comment. However, without access to rhe relevant issue of Die Schwalbe-it is not on Vaclav's link page-I know not or can guess the true solution, but surely it is on the same as the current pseudo-try. (2020-11-08)
James Malcom: Wait-I think that the solution is that it must be Black to move first! Just figured this out after last comment. Lemme try out the retro animation. (2020-11-08)
James Malcom: And indeed it does work! Having Black move first later saves them from an illegal tempo move that encloses the White queen from an illegal cage drom which it can never escape. A very exquisite trap for any retro solver! (2020-11-08)
James Malcom: Lastly, here is a PG that may or may not be the shortest: 1. Nf3 c5 2. Ne5 Qb6 3. Nc3 Qb3 4. axb3 c4 5. Nd5 c3 6. Ra6 Nf6 7. Rd6 Ng4 8. Re6 Ne3 9. Nf4 Nxf1 10. Nh5 Ne3 11. Ng3 Nc4 12. bxc4 dxe6 13. Nf5 Bd7 14. Ng3 Ba4 15. Nf5 Bb3 16. Ng3 Ba2 17. Nf5 Nc6 18. Ng3 Na5 19. Nf5 Nb3 20. Ng3 Na1 21. b3 a6 22. Ba3 Ra7 23. Bc5 Kd8 24. Qc1 Kc8 25. Qa3 Kc7 26. Qa4 Bb1 27. Qe8 f6 28. Qf7 Kc8 29. Qg8 Kb8 30. Bd6+ Ka8 31. Bb8 Ba2 32. Nd7 Bb1 33. O-O Ba2 34. Rb1 f5 35. Rb2 Bb1 36. Ra2 f4 37. Ra5 Ba2 38. Rg5 Bb1 39. Rg6 hxg6 40. Nh1 Rh3 41. Qh7 Rg3 42. hxg3 Ba2 43. Kh2 Bb1 44. Kh3 Ba2 45. Kg4 Bb1 46. Kf3 Ba2 47. Ke4 Bb1 48. Kd4 Ba2 49. Kc5 Bb1 50. Kb6 Ba2 51. Kc7 Bb1 52. Kd8 Ba2 53. Ke8 Bb1 54. Kf7 Ba2 55. Kg8 Bb1 56. Kh8 Ba2 57. Qg8 Bb1 (2020-11-08)
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comment
Keywords: Castling in the retro play
Genre: Retro
FEN: kB3bQK/rp1Np1p1/p3p1p1/8/2P2p2/1Pp3P1/2PPPPP1/nb5N
Input: Gerd Wilts, 1995-06-03
Last update: James Malcom, 2020-11-08 more...
2 - P0000775
Ferad Kakabadze
1422 Die Schwalbe 30 12/1974
P0000775
(11+5) C+
#3
Welches waren die letzten 2 Einzelzüge?
1. e8=D! f5 2. exf6ep e5 3. Dxe5#
R: 1. b2-b1=L 0-0
play all play one stop play next play all
Henrik Juel: The forward play is C+ Popeye 4.61
1.e8=D thr. 2.Dc8 thr. 3.Dc3#
1... f5 2.exf6ep e5 3.Dxe5#
(1... f6 does not prevent the threat, so 2.exf6 is not considered dualistic) (2020-09-26)
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comment
Keywords: Last Moves?, Valladao Task, En passant, Promotion, Castling in the retro play, Obtrusive material
Genre: Retro, 3#
FEN: 8/3pPp2/3Pp3/4P3/1N3P2/B7/P1P2P2/kb3RK1
Input: Gerd Wilts, 1995-06-03
Last update: James Malcom, 2020-09-27 more...
3 - P1375777
James Malcom
PDB Website 10/4/2020
nach Josef Cumpe
P1375777
(1+8)
Last two moves?
(-:
R: 1. 0-0-0# a7-a8=sT
play all play one stop play next play all
See P1234039
Henrik Juel: Missing Joke keyword, I guess (2020-05-11)
A.Buchanan: Curious that retro a7-a8=sT discomforts the animation still - maybe you should report to Gerd? (I trouble him with enough stuff already - don't want to be the only one emailing him! :-) (2020-05-11)
A.Buchanan: Maybe +sBe7f7 to refute R. ... e8=sK/fxe8=sK :-) Note this "cook" is actually prevented in the original. (2020-05-11)
A.Buchanan: Oops and a more major cook R: 1. Se8/g8-f6+ (2020-05-11)
James Malcom: This problem was only half-finished before I fell asleep. It’s fixed now. (2020-05-11)
A.Buchanan: Great! You could save another piece I think -sLg6, -sBf7, + sDf7. This also removes the obtrusive promotion (2020-05-11)
James Malcom: Yes, that is true. Position edited. (2020-05-11)
James Malcom: I see nothing wrong with fiddling if it improves economy. (2020-05-11)
A.Buchanan: If promotion to Bl unit is allowed, can’t Bl just have played e8xd7+ or g8xh7+? Can replace bPd7 with bR but eliminating bPh7 is more complicated. Need +wPh7 +bPg6h6. And also bRb7 to prevent discovered check by bPc8 prior to e7-e8=bK. I think that’s watertight now! :-) (2020-10-13)
A.Buchanan: The issue is that there are two or three levels of Bl promotion joke: this problem relies on the "basic" joke where black officers can be created. But where's the line to stop us promoting to Bl pawn or king? If we go that far, then a position like this 2kr3K/1r1r1qrR/7p/8/8/8/8/8 is required. Oh dear: sorry to have brought it up :( (2020-10-13)
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comment
Keywords: Castling in the retro play, Promotion in the retro play (t), Rex solus (w), Joke, Joke promotion, Type C
Genre: Retro
FEN: 2kr3K/1p1ppqrp/8/8/8/8/8/8
Input: James Malcom, 2020-05-11
Last update: Alfred Pfeiffer, 2020-10-14 more...
4 - P1380852
James Malcom
Andrew Buchanan

MatPlus.net Forum 12/10/2020
nach Josef Cumpe
P1380852
(1+7)
Last two moves?
(-:
See P1234039 and P1375777
The joke here is that pawns may promote to enemy officers (but not to pawns or kings)
Henrik Juel: R: 1... 0-0-0+ 2.a7-a8=sT! (2020-10-12)
A.Buchanan: Maybe this is a moderate joke where we allow promotion to Bl officers, while son-of-P1375777 can be the extreme joke where promotion to any Bl unit is allowed (i.e. pawn & king too), including in the history of the game. What would Josef Cumpe think? :-) He and I are both dressed as clerics in out chesscomposers' blogspot pics: http://chesscomposers.blogspot.com/2012/08/august-16th.html. Perhaps he was a real one though? (2020-10-13)
comment
Keywords: Last Moves?, Joke promotion (t), Rex solus, Type C, Castling in the retro play, Joke, Promotion in the retro play (t)
Genre: Retro
FEN: 2kr2K1/1p1p1npr/8/8/8/8/8/8
Input: A.Buchanan, 2020-10-12
Last update: Alfred Pfeiffer, 2020-10-14 more...
5 - P1380882
James Malcom
Andrew Buchanan

PDB Website 14/10/2020
nach Josef Cumpe
P1380882
(2+7)
Last two moves?
(-:
See P1234039, P1375777 and P1380852.
The joke here is that pawns may promote to *any* unit (friend or enemy; officer, king or pawns).
Henrik Juel: R: 1... 0-0-0+ 2.a7-a8=sT
not 2.e7-e8=sK, because then sTa8 would have moved, and castling not allowed (2020-10-14)
A.Buchanan: Exactly, Henrik. Also: sB on 7th rank could retract to 8th rank, so we need sT instead (2020-10-14)
more ...
comment
Keywords: Last Moves? (2), Type C, Castling in the retro play, Non-standard material (tt), Joke, Joke promotion (t), Promotion in the retro play (t)
Genre: Retro
FEN: 2kr3K/1r1r1qrR/7p/8/8/8/8/8
Input: A.Buchanan, 2020-10-14
Last update: Alfred Pfeiffer, 2020-10-14 more...
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The problems of this query have been registered by the following contributors:

Gerd Wilts (2)
James Malcom (1)
A.Buchanan (2)