Author: Omid David Tabibi
Date: 02:35:01 01/10/03
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On January 10, 2003 at 04:57:50, Uri Blass wrote: >On January 10, 2003 at 04:55:17, Omid David Tabibi wrote: > >>>Your positions are illegal. >>> >>>In the first position there are 32 pieces on the board and it means that there >>>were no captures so there were no promotions and it is impossible to have it >>>when the number of white queens is bigger than 1. >>> >>>In the second and third position there are 30 pieces but it is easy to prove >>>that all the white pawns need to promote to get 8 white queens and 2 white >>>bishops with the same color. >>> >>>It is impossible to promote 8 pawns when only 2 capture are allowed because >>>every capture can open at most 2 new files for promotion. >>> >> >> >>[D]k1K5/8/8/8/8/8/7P/6B1 w - - 0 1 >>White to move. >> >>Is the above position legal? If so, what were the last two moves? >> >> >>Source: The Chess Mysteries of Sherlock Holmes, by Raymond Smullyan. > >Na8+ Kxa8 > Another interesting position: [D]1n2k3/p1pqppp1/1p1p1n2/3N2p1/1PB3bP/2P1PN2/1P1P1PP1/2BQK2R w - - 0 1 Can white castle? >Uri
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