Author: Robert Hyatt
Date: 07:26:21 01/13/02
Go up one level in this thread
On January 13, 2002 at 00:35:43, Pham Minh Tri wrote: >On January 12, 2002 at 20:37:36, Robert Hyatt wrote: > >>On January 12, 2002 at 10:07:11, Pham Minh Tri wrote: >> >>>main.c: "Deep Blue extension limit removed and restored to one ply of extension >>>per ply of search." >>> >>>Amazing! I still think that Crafty 18.12 is significantly stronger than previous >>>versions because of that limit. >> >> >>I did a lot of testing and found that in real games, the DB method simply >>does too many extensions for my liking. The normal Crafty search can explode >>in some positions. It happened more often with the DB limit (no more than >>two plies of extension for any two consecutive plies, rather than the current >>one ply of extension max for any ply.) > >I just think about an idea: use 1.x (e.g. 1.5) limit instead of 2 plies. What do >you think? Thanks. It is worth trying. But then that would be _worse_ than the current method in many cases, as the current method can extend one ply for every ply of search in particularly "checky" type positions where the king is exposed...
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