Author: José Carlos
Date: 02:00:20 11/10/03
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On November 10, 2003 at 04:44:10, Jouni Uski wrote: >Hard for Ruffian (P4 2,4 GHz), not found in 20 minutes, BUT after executing >move sees very fast, that white is mated! Null move problem? > >Jouni I don't know for Ruffian, but I guess it's the same reason than for my program: in the initial position, the program must search a lot of moves of queen and rook, so it takes a while to search deep enough, but if you take the rook, gxf3 is forced and then there's a pawn ending, where it's much faster to search very deep. My program Anubis finds it in ply 22 after forcing Qxf3, very quicky, but from the initial position, after some minutes, it's still in depth 16, so it will take a long time to get the needed 23 plies (probably less due to extensions, maybe like 20 or 21). José C.
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