Author: Robert Hyatt
Date: 14:55:13 01/25/04
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On January 25, 2004 at 13:58:24, Uri Blass wrote: >I see in Crafty's code that Crafty extends mate threats but how can it know >usually about mate threats when it is using fail hard and not fail soft? > >I do not see in crafty's code a special search after null move(even to reduced >depth) in order to find if there is a mate threat. This is done _in_ the null-move search. It simply says "If I do nothing (play a null-move) and my opponent mates me instantly, then this position has a threat and should be searched deeper... I detect the threat when doing the null-move score and getting a mate score backed up. Crafty is not really "fail hard". It just is not fail-soft... > >Uri
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