2 problem(s) found in 6050 milliseconds (displaying 2 problem(s)). [COMMENTDATE>=20200919 AND NOT K='Hilfsrückzüger' AND K='En passant als Schlüssel' AND A='Myllyniemi, Matti Arvo'] [download as LaTeX]
1. ... g6 2. 0-0 gxf7 3. Kh8 Le5#
1. ... cxb6ep 2. 0-0-0 bxa7 3. Td7 a8=D#
1. ... cxb6ep 2. 0-0-0 bxa7 3. Td7 a8=D#
Keywords: a posteriori (AP), En passant as key, Castling (sksg), Promotion (D), Valladao Task
Genre: h#, Retro
FEN: r3k2r/p4p1p/8/KpP2PP1/4PBpP/5pp1/6p1/8
Reprints: Nordisches Turnier 1970-1971
Input: Gerd Wilts, 1995-06-03
Last update: James Malcom, 2020-10-25 more...
Genre: h#, Retro
FEN: r3k2r/p4p1p/8/KpP2PP1/4PBpP/5pp1/6p1/8
Reprints: Nordisches Turnier 1970-1971
Input: Gerd Wilts, 1995-06-03
Last update: James Malcom, 2020-10-25 more...
1. Sxc5,Se5? 0-0-0!
but by AP now
1. dxc6ep! exd6 2. Sg6#
but by AP now
1. dxc6ep! exd6 2. Sg6#
Mario Richter: How is the ep-key justified here? (Perhaps some kind of AP?) (2010-06-15)
Gerd Wilts: The author's reasoning is 1. Sxc5? 0-0-0!, but if Black can castle, then White can capture en passant: 1. dxc6ep. But this if of course not correct according to the Codex. (2010-06-15)
A.Buchanan: The only problem with having this as PRA is that the part where ep & 000 are both off is cooked. That could be fixed by e.g. adding bPf6 & wPg7. But the composer is saying that this problem already works as AP, if we allow the try 1. Sxc5? (or equally 1. Se5?) to *prove* that 000 is ok, which implies that ep is ok too. (2022-05-24)
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Gerd Wilts: The author's reasoning is 1. Sxc5? 0-0-0!, but if Black can castle, then White can capture en passant: 1. dxc6ep. But this if of course not correct according to the Codex. (2010-06-15)
A.Buchanan: The only problem with having this as PRA is that the part where ep & 000 are both off is cooked. That could be fixed by e.g. adding bPf6 & wPg7. But the composer is saying that this problem already works as AP, if we allow the try 1. Sxc5? (or equally 1. Se5?) to *prove* that 000 is ok, which implies that ep is ok too. (2022-05-24)
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Keywords: En passant as key, Castling, a posteriori (AP) (Type Petrovic)
Genre: Retro
FEN: r3kNQ1/3Npp2/1P1Pp3/bKpP4/1p6/8/8/8
Reprints: (37) Mat Plus 12 10-12/2009
Input: Gerd Wilts, 2010-06-13
Last update: A.Buchanan, 2022-05-24 more...
Genre: Retro
FEN: r3kNQ1/3Npp2/1P1Pp3/bKpP4/1p6/8/8/8
Reprints: (37) Mat Plus 12 10-12/2009
Input: Gerd Wilts, 2010-06-13
Last update: A.Buchanan, 2022-05-24 more...
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The problems of this query have been registered by the following contributors:
Gerd Wilts (2)
If Black can castle both ways, last move must have been b7-b5
C+ Popeye 4.61 (2020-10-25)
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