Author: Omid David Tabibi
Date: 03:12:45 01/10/03
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On January 10, 2003 at 05:52:19, Tony Werten wrote: >On January 10, 2003 at 05:35:01, Omid David Tabibi wrote: > >>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? > >No. Your fen says white has no castle rights :) > When you look at an actual chess board, no one will tell you the castle rights! Just ignore the FEN... :-) >Tony > >> >> >>>Uri
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