3 problem(s) found in 8768 milliseconds (displaying 3 problem(s)). [COMMENTDATE>=20200919 AND NOT S='Schach' AND A='Saunders, Denis M.'] [download as LaTeX]
a) 1. 0-0-0? illegal
1. Td1! droht 2. Dc4#
1. ... Se3 2. Dxe3#
1. ... Se5 2. Dxe5#
1. ... cxb5 2. Txb5#
1. ... Tf4 2. Dxe7#
1. ... Dxc2 2. Txc2#
1. ... Dd3 2. Sxd3#
1. ... De4+ 2. Sxe4#
b) 1. Td1? Te8! pinning
1. ... Te7? 2. Dxe7#
1. 0-0-0! then all variations as in a)
(a) sLa7 is promoted. If White castling rights remain, then bPf captured fxgxh2xg1=L, which with dxc6 makes 4 captures. White has lost Bd, Be, Bf/h & Lc. However, wBe can't have captured or promoted (h/fxg & Lf at home are the only Black casualties), so can't have contributed to Black captures. Therefore impossible, and wK did lose castling rights before. Now trivial for sBf to have promoted.
(b) sLa7 can be original, so castling is still ok. Even if sLa7 is promoted, wBe can have promoted, and again White can still castle.
1. Td1! droht 2. Dc4#
1. ... Se3 2. Dxe3#
1. ... Se5 2. Dxe5#
1. ... cxb5 2. Txb5#
1. ... Tf4 2. Dxe7#
1. ... Dxc2 2. Txc2#
1. ... Dd3 2. Sxd3#
1. ... De4+ 2. Sxe4#
b) 1. Td1? Te8! pinning
1. ... Te7? 2. Dxe7#
1. 0-0-0! then all variations as in a)
(a) sLa7 is promoted. If White castling rights remain, then bPf captured fxgxh2xg1=L, which with dxc6 makes 4 captures. White has lost Bd, Be, Bf/h & Lc. However, wBe can't have captured or promoted (h/fxg & Lf at home are the only Black casualties), so can't have contributed to Black captures. Therefore impossible, and wK did lose castling rights before. Now trivial for sBf to have promoted.
(b) sLa7 can be original, so castling is still ok. Even if sLa7 is promoted, wBe can have promoted, and again White can still castle.
1. Tf7! Tf4, T~ 2. La2+ Kxc2 3. Txf4, ~xT Kd3 4. 0-0-0#
1. ... Tg5 2. Lxg5 h4 3. Txf3 h3, exf3 4. Se2#, e4#
BS Problemid: 23075
Authors: Saunders, Denis M
Kloostra, Juan
Sources: The Wizard of Oz 1999
Years: 1987
1. ... Tg5 2. Lxg5 h4 3. Txf3 h3, exf3 4. Se2#, e4#
BS Problemid: 23075
Authors: Saunders, Denis M
Kloostra, Juan
Sources: The Wizard of Oz 1999
Years: 1987
Keywords: Brian Stephenson Collection (23075), Belen Theme
Genre: n#
Computer test: Gustav 4.1d, Brute Force
FEN: 8/7R/1P6/2P2r1p/N2Pp2B/2p1Pp2/2P2P2/RBk1K1N1
Input: Brian Stephenson, 2004-08-12
Last update: Mario Richter, 2020-09-23 more...
Genre: n#
Computer test: Gustav 4.1d, Brute Force
FEN: 8/7R/1P6/2P2r1p/N2Pp2B/2p1Pp2/2P2P2/RBk1K1N1
Input: Brian Stephenson, 2004-08-12
Last update: Mario Richter, 2020-09-23 more...
1. Da2! droht 2. De2#
1. ... Sc2 2. Db3#
1. ... gxf3 2. Dd2#
1. ... Kxf3 2. Df2#
1. ... Sc2 2. Db3#
1. ... gxf3 2. Dd2#
1. ... Kxf3 2. Df2#
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The problems of this query have been registered by the following contributors:
Gerd Wilts (1)Brian Stephenson (1)
Felber, Volker (1)
Kees: a) 1.Td1! [2.Dc4‡]
b) 1.0-0-0! [2.Dc4‡]
La7 is promoted.
In a) fxg/e=L King must move (e2 cannot promote) so no 0-0-0.
In b) fxgxhxg=L and 1. 0-0-0 for 1. Td1? Te8! (2022-02-02)
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