Author: Robert Hyatt
Date: 05:49:06 02/28/00
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On February 28, 2000 at 03:25:09, Tom Kerrigan wrote: >On February 27, 2000 at 18:00:32, Robert Hyatt wrote: > >>I don't believe this can be safely overlooked, because the wrong repetition >>value is a tiny part of a much bigger problem, that of not correctly hashing >>positions... the former may not happen often. The latter happens thousands >>of times every search. Often enough that it will _definitely_ affect the >>root score enough to make a difference. > >I would like to see some numbers to back up your argument. > >-Tom 3, 47.5, 2.71828, 3.14159265358979323846264, and -.2 All you have to do is run with and without EP hashed into your signature to see the problem. I lost a game early in the crafty development due to this. Fortunately the IM in question sent me a message on ICC. I searched a position where an EP capture wasn't possible and found a forced mate. I then searched a position (identical except that an ep capture _was_ possible and announced a mate. He re-captured EP and mated me instead.. EP is a very common move in the opening and early middlegame.
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