Author: Dieter Buerssner
Date: 09:04:47 12/27/03
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On December 27, 2003 at 05:42:54, Tord Romstad wrote: >On December 26, 2003 at 18:12:26, Dieter Buerssner wrote: > >>Related is the problem >>with repetitions (and 50 moves rule), which are also not handled correctly by >>the HT. > >Yes. In the past I used to solve this problem by not storing nodes with >repetition >draws or 50 move draws in the transposition table, but this became too expensive >when I changed my search to MTD(f). I think, it will help almost nothing, to not store repetition draws in the HT. The 50 moves rule can be hadnled with a bit more care. For example, if current-search-depth + game_50-counter >= 100 (or something like this), don't allow cutoffs from HT, just use it for move ordering. If it makes an engine stronger is doubtful. Regards, Dieter
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