Author: Chris Welty
Date: 07:03:03 09/09/04
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On September 09, 2004 at 09:45:08, Andrew Platt wrote: >4r1k1/p1qr1p2/2pb1Bp1/1p5p/3P1n1R/1B3P2/PP3PK1/2Q4R w - - > >You may recognize this as WAC 141 (again!). The key move is Qxf4! which I spot >at iterate ply 9, though I don't see the mate there because the search drops >into the quiescent search where I don't see the final move Rh8# (I don't >generate / deal with checks in qsearch). > >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.
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