Author: Mridul Muralidharan
Date: 23:00:13 03/22/04
Go up one level in this thread
On March 22, 2004 at 19:30:35, Anthony Cozzie wrote: >On March 22, 2004 at 17:18:49, Dann Corbit wrote: > >>On March 22, 2004 at 16:18:19, Anthony Cozzie wrote: >> >>>On March 22, 2004 at 03:40:57, Daniel Shawul wrote: >>> >>>>Hello >>>> >>>>I have decided to use attack tables. I just did >>>>a rough implementation of it at the beginning of the eval >>>>according to Ed's paper. The problem is the thing dropped the nodecount >>>>by almost 40% . Initial position nodecount was 800000 and now it is 500000. >>>>Do incremental move attack tables help? And how do i update the table? It seems >>>>very difficult to update a sliding move and other special cases. >>>> >>>>thanks >>>>daniel >>> >>>I have some code for incremental attack tables if you want it. However, it took >>>Tord 4 months to figure out :) I don't use attack tables in Zappa; i wrote this >>>when i was considering switching to a piecelist based engine. >> >>Is your code 0x88 or bitboard based? > >board[64]. Its based on Vincent's move generator. > >anthony Hi Anthony, I had done an incremental attacktable but was not quiet sucessful with it - it was almost same speed as the previous one : and so removed - potential for more bugs (kiss). I would love to have a look at your code , if it is freely available. Thanks in advance Mridul
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