Author: Robert Hyatt
Date: 09:59:47 05/02/01
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On May 02, 2001 at 12:34:51, Graham Laight wrote: >On May 02, 2001 at 12:28:09, Robert Hyatt wrote: > > >Hi Bob, > >You're probably right - but when I studied the eval.c in the version of Crafty >you sent me for the WMCCC 2000, I remember that some "anti-human" code had been >removed. From memory, the code to prevent the Stonewall attack in particular. > >Apologies if I'm wrong. > >-g If you still have the source, you might check. It should _not_ have been removed. When I am playing a computer, the program behaves differently in two ways: 1. it uses a more reasonable draw score than it does against humans. IE for humans I might use -.3, but for a computer opponent, I always use 0.0.. 2. In time management, sometimes humans try to play "shuffle-chess" and move instantly to try to run crafty out of time. It recognizes this and speeds itself up dramatically to avoid the problem. Against computers I disable this. I don't have any evaluation differences between computer and non-computer opponents at all. The "stonewall" code wasn't removed to my knowledge. I did rewrite it and move it somewhere else in the evaluation. It is certainly possible that the comments were misplaced or missing for a while, but I have never knowingly played without that as it is dangerous to let a computer play white and start a Stonewall attack, which is quite easy to play even for a computer.
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