Author: John Timm
Date: 21:03:23 03/02/99
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On March 02, 1999 at 17:59:16, John Coffey wrote: >The latest Chess Life had an article about material imbalances and the >value of the chess pieces. Is anyone going to try to use this in their >programs? > >John Coffey Much of the same information (with even greater detail in some cases) was presented by the same author in the old printed Computer Chess Reports. And the author noted in both articles that some of the data presented was based on even earlier sources. So any programmer who wants to use this type of information has already had the opportunity to do so. Most authors of top programs are reluctant to disclose details about their programs, but Bob Hyatt (Crafty) isn't, and his program has, for instance, a bonus for the bishop pair (.25 pawn) and an additional bonus (.30 pawn) for Bishop versus Knight in an endgame with pawns on both sides of the board. He has also experimented with bonuses for various piece combinations (for example, Bishop + Rook versus Knight + Rook). I'm sure that all top programs do something similar (or even more sophisticated), but the details are generally known only to the programmers.
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