Author: Tony Werten
Date: 02:25:27 05/03/00
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On May 02, 2000 at 20:35:09, William Bryant wrote: >In my program my killer table is simply an array of [ply][2] with two killers >allowed per ply. When updating the killer table, I replace the first killer >with the new one (assuming it is not the same move), and move the old first >killer to the second killer position, dropping what ever move is in the second >killer position. > >In the introductory paragraphs of Ernst's book, he describes using counters >to order the killer moves (page 23) >"The killer moves carry "hit" counters with them which specify their priorities >for sorting and replacement." > >This would, of course, require a larger table, and more time spent updating >and sorting the killer table. > >Is this more efficient or effective than a standard replace table? Other >thoughts or comments about organizing the killer moves? I use it (almost) the same as you do. I do count the killers, but that I put in the history table. You wrote you just use a simple array. Depending on your implementation of null-move, you might want to use 2 arrays. One for black, one for white. Tony > >Thanks. > >William >wbryant@ix.netcom.com
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