6 problem(s) found in 3315 milliseconds (displaying 6 problem(s)). [COMMENTDATE>=20220810 AND G='Retro' AND CPLUS AND K='Kein letzter Zug von Schwarz'] [download as LaTeX]
1. ... h6 2. La4 Kxa2 3. Tf3 Ka1 4. Ta3#
retro try: 1. Lg8?? h6 2. Tf7 Kxa2 3. Ta7#
retro try: 1. Lg8?? h6 2. Tf7 Kxa2 3. Ta7#
Keywords: No legal last move for Black, Minimal
Genre: Retro, 3#
Computer test: C+ Popeye 4.61
FEN: 8/7p/8/7P/8/1B6/P1P2R2/k1K5
Reprints: RA14 diagrammes 15 06/1975
Input: Gerd Wilts, 1995-06-03
Last update: A.Buchanan, 2022-11-27 more...
Genre: Retro, 3#
Computer test: C+ Popeye 4.61
FEN: 8/7p/8/7P/8/1B6/P1P2R2/k1K5
Reprints: RA14 diagrammes 15 06/1975
Input: Gerd Wilts, 1995-06-03
Last update: A.Buchanan, 2022-11-27 more...
2 - P1085404
Valery Liskovets
13336v Die Schwalbe 224 04/2007
Werner Keym zum 65. Geburtstag gewidmet
(15+7) C+
#2
b) ohne wLb2, AP
c) ferner mit sBe7 nach d6, AP
Valery Liskovets
13336v Die Schwalbe 224 04/2007
Werner Keym zum 65. Geburtstag gewidmet
(15+7) C+
#2
b) ohne wLb2, AP
c) ferner mit sBe7 nach d6, AP
a) 1. ... gxf3ep 2. Lxf3 Lf5 3. Txg2#! (3.0-0-0#??)
1. Lf3?? gxf3 2. 0-0-0#?
b) 1. ... gxf3ep 2. Lxf3 Lf5 3. 0-0-0#! (3.Txg2#??)
1. Lf3?? gxf3 2. 0-0-0#??
c) 1. ... gxf3ep 2. Lxf3 Lf5 3. 0-0-0#!! (3.Txg2#??)
1. Lf3? gxf3 2. 0-0-0#??
1. Lf3?? gxf3 2. 0-0-0#?
b) 1. ... gxf3ep 2. Lxf3 Lf5 3. 0-0-0#! (3.Txg2#??)
1. Lf3?? gxf3 2. 0-0-0#??
c) 1. ... gxf3ep 2. Lxf3 Lf5 3. 0-0-0#!! (3.Txg2#??)
1. Lf3? gxf3 2. 0-0-0#??
VL: Keywords: Whose move? (Wer ist am Zug?); Forced en passant
(a) 1.Lf3?? gxf3 2.0-0-0#? (?? denotes illegal).
0... gxf3 e.p.(forced!) 1.Lxf3 Lf5 2.Txg2#! (2.0-0-0#??)
Bl has the move, e.p. capture is legal, and castling is illegal.
(b) 1.Lf3?? gxf3 2.0-0-0#?
0... gxf3 e.p.(forced) 1.Lxf3 Lf5 2.0-0-0#! (2.Txg2#?? - AP-illegal).
Bl still has the move (due to bPe7). Unlike (a), two different retro-moves are possible: i) f2-f4 (f3xSg2) or ii) b2xc3 (in which case castling is illegal due to the missing dark-squared w Bishop). AP after Petrovic in the reversed form "a la Abdurahmanovic": W forces Bl to capture e.p.
(c) 1.Lf3? gxf3 2.0-0-0#??
0... gxf3 e.p.(!) 1.Lxf3 Lf5 2.0-0-0#!! (2.Txg2#?? - AP-illegal).
W's turn to move is possible (in which case, however, castling is illegal). Executed castling justifies jointly Bl's turn to move (AP after Keym) and e.p.
The twins differ by the role of castling: it is illegal in (a), is legal and legalizes Bl's e.p.-key in (b) and legalizes both Bl's turn to move and e.p. in (c). Separately they have 1-mover predecessors: resp., P0005627, P1066685 and P1068112. (2009-06-22)
A.Buchanan: Very nice problem! Ke2# is a dual not provided separately, but I don't see a way to dispense with it (2023-07-22)
comment
(a) 1.Lf3?? gxf3 2.0-0-0#? (?? denotes illegal).
0... gxf3 e.p.(forced!) 1.Lxf3 Lf5 2.Txg2#! (2.0-0-0#??)
Bl has the move, e.p. capture is legal, and castling is illegal.
(b) 1.Lf3?? gxf3 2.0-0-0#?
0... gxf3 e.p.(forced) 1.Lxf3 Lf5 2.0-0-0#! (2.Txg2#?? - AP-illegal).
Bl still has the move (due to bPe7). Unlike (a), two different retro-moves are possible: i) f2-f4 (f3xSg2) or ii) b2xc3 (in which case castling is illegal due to the missing dark-squared w Bishop). AP after Petrovic in the reversed form "a la Abdurahmanovic": W forces Bl to capture e.p.
(c) 1.Lf3? gxf3 2.0-0-0#??
0... gxf3 e.p.(!) 1.Lxf3 Lf5 2.0-0-0#!! (2.Txg2#?? - AP-illegal).
W's turn to move is possible (in which case, however, castling is illegal). Executed castling justifies jointly Bl's turn to move (AP after Keym) and e.p.
The twins differ by the role of castling: it is illegal in (a), is legal and legalizes Bl's e.p.-key in (b) and legalizes both Bl's turn to move and e.p. in (c). Separately they have 1-mover predecessors: resp., P0005627, P1066685 and P1068112. (2009-06-22)
A.Buchanan: Very nice problem! Ke2# is a dual not provided separately, but I don't see a way to dispense with it (2023-07-22)
comment
Keywords: a posteriori (AP) (Type Petrovic), Castling (wg), No legal last move for Black
Genre: Retro, 2#
Computer test: HC+ retro thinking & Popeye v4.87
FEN: 8/3PpP2/2Q1P3/3N2P1/5Pp1/2P1P1Pb/1B1R2pp/R2BK1kr
Input: Gerd Wilts, 2009-06-08
Last update: A.Buchanan, 2023-07-22 more...
Genre: Retro, 2#
Computer test: HC+ retro thinking & Popeye v4.87
FEN: 8/3PpP2/2Q1P3/3N2P1/5Pp1/2P1P1Pb/1B1R2pp/R2BK1kr
Input: Gerd Wilts, 2009-06-08
Last update: A.Buchanan, 2023-07-22 more...
1. ... Kxa1! 2. c4 Ka2 3. Sc3+ Ka1 4. Lb2#
Retro try:
1. c4? Kxa1 2. Lb2+ Ka2 3. Sc3#
Retro try:
1. c4? Kxa1 2. Lb2+ Ka2 3. Sc3#
RA3
A.Buchanan: I guess for these kinds of problems it's always worth looking if there is a retro try. Here there is - an added bonus (2023-12-04)
more ...
comment
A.Buchanan: I guess for these kinds of problems it's always worth looking if there is a retro try. Here there is - an added bonus (2023-12-04)
more ...
comment
Keywords: Miniature Collection (0341852), Miniature, No legal last move for Black
Genre: 3#, Retro
Computer test: C+ Popeye 4.61 and analysis
FEN: 8/8/8/8/8/1PP5/k1K5/NNB5
Input: Zuncke/Bruder, 2010-09-11
Last update: A.Buchanan, 2023-12-04 more...
Genre: 3#, Retro
Computer test: C+ Popeye 4.61 and analysis
FEN: 8/8/8/8/8/1PP5/k1K5/NNB5
Input: Zuncke/Bruder, 2010-09-11
Last update: A.Buchanan, 2023-12-04 more...
1. ... Kxa6 2. Ta8+ Kb7 3. Lc6#
1. ... Kxc8 2. Ta8+ Kb7 3. Lc6#
1. Lc6+? Kxa6,Kxc8 2. Ta8#
1. ... Kxc8 2. Ta8+ Kb7 3. Lc6#
1. Lc6+? Kxa6,Kxc8 2. Ta8#
Keywords: Miniature Collection (0315439), No legal last move for Black, Miniature
Genre: 2#, Retro
Computer test: C+ Popeye 4.61 and human reasoning
FEN: 2R5/1kB5/RP6/3K4/B7/8/8/8
Input: Zuncke/Bruder, 2010-09-11
Last update: A.Buchanan, 2023-06-29 more...
Genre: 2#, Retro
Computer test: C+ Popeye 4.61 and human reasoning
FEN: 2R5/1kB5/RP6/3K4/B7/8/8/8
Input: Zuncke/Bruder, 2010-09-11
Last update: A.Buchanan, 2023-06-29 more...
1. ... Kxd8 2. Dc4 Ke8 3. Dc8#
1. ... Kxf8 2. Dg4 Ke8 3. Dg8#
1. De5!? but Black to move
1. ... Kxf8 2. Dg4 Ke8 3. Dg8#
1. De5!? but Black to move
Keywords: Miniature Collection (0312472), No legal last move for Black, Miniature, Homebase
Genre: 2#, Retro
Computer test: C+ Popeye 4.61 after obvious analysis
FEN: 3BkN2/8/4K3/8/8/2P3P1/4Q3/8
Input: Zuncke/Bruder, 2010-09-12
Last update: A.Buchanan, 2023-08-17 more...
Genre: 2#, Retro
Computer test: C+ Popeye 4.61 after obvious analysis
FEN: 3BkN2/8/4K3/8/8/2P3P1/4Q3/8
Input: Zuncke/Bruder, 2010-09-12
Last update: A.Buchanan, 2023-08-17 more...
1. ... g5,g6 2. hxg6ep,hxg6 hxg6 3. Sxg6
2. ... h5,h6 3. g7#
2. ... h5,h6 3. g7#
Keywords: Miniature Collection (0312557), No legal last move for Black, Miniature
Genre: 2#, Retro
Computer test: C+ Popeye 4.61 and obvious analysis
FEN: 5KBk/6pp/8/7P/7N/8/8/8
Input: Zuncke/Bruder, 2010-09-12
Last update: A.Buchanan, 2023-08-17 more...
Genre: 2#, Retro
Computer test: C+ Popeye 4.61 and obvious analysis
FEN: 5KBk/6pp/8/7P/7N/8/8/8
Input: Zuncke/Bruder, 2010-09-12
Last update: A.Buchanan, 2023-08-17 more...
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The problems of this query have been registered by the following contributors:
Gerd Wilts (2)Zuncke/Bruder (4)
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