Author: Robert Hyatt
Date: 18:41:31 05/10/01
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On May 10, 2001 at 20:15:19, Dann Corbit wrote: >Consider this position: >[D]r1b1r1k1/p4pp1/2p4p/n7/2PP4/2N2Nq1/PPQKBnP1/R1B3R1 b - - >Black is behind in material. Black has a mate in 4. > >Suppose at some juncture of the game black could claim checkmate by the 50 move >rule if black so desired. Would your search algorithm claim the draw or ignore >it and go for the checkmate? Crafty searches it as a zero-sum game. If it sees a forced mate, it realizes that the opponent will claim the draw at move 50 if he can... Crafty would not walk into the draw voluntarily unless it could find nothing better (ie it might try a pawn push or capture that resets the 50-move counter without giving up the forced mate opportunity.
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