Author: Andrew Platt
Date: 08:40:03 09/09/04
Go up one level in this thread
On September 09, 2004 at 11:25:16, Andrew Platt wrote: >>>So we back up non-mate scores which, as expected, end up in the hash table - >>>including the following: >>> >>>Qxf4 Be5 Rxh5 Bxf4 (ply 4, depth 270) >> >>If this position was searched with remaining depth>0 it should be in your >>hashtable as mate in 1. If it was searched with remaining depth=0 it should be >>too shallow to impact your null-move search. > >Hmm, you're right: Qxf4 Be5? Rxh5 Bxf4?? Rh8# I'll have to check how we're >backing up a non-mate score there. I just took another look. The score is obtained from a null move search from Qxf4 Be5 Rxh5 Bxf4. In this situation you don't end up with a mate score (at least not within the remaining depth) but it gets stored in the hash table just the same. Andy.
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