Author: Michael Neish
Date: 07:17:58 12/19/02
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>check exensions are used for the last plies. >I do not know if there are programs that use extensions for patterns(for example >extend Nf7+ Kg8 Nh6+ Kh8 Qg8+ Rxg8 when these moves are possible) I thought of implementing something like this, but obviously the problem is that there are so many possible pattens to watch out for. I thought whether some pre-eval could be done before the search starts which then tells the search() function "watch out in case these patterns appear", so that extensions can be turned on and off in advance according to the nature of the position. Obviously there can't be a smothered mate if one of the Pawns has moved so it's no use wasting time detecting the pattern. Another problem could be that the deeper we're searching the less accurate our pre-eval is going to be anyway. Any ideas Uri? Mike.
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