Author: Ratko V Tomic
Date: 10:10:05 09/30/99
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> You should take a look at Chessmaster 6000, it plays for increasing > its mobility and restricting its opponents... I notice this with > the modified personality , CM6666. I didn't notice it with regular CM (I noticed it plays odd looking moves, like putting its bishop on d6 before d7 pawn was moved, and its positions often look weird). I looked at the Shep's site for CM 6666 personality (few days ago), but it doesn't seem to have a link for download. Have those files come back online now? All programs use in some form the mobility/control type evaluations. But these evaluations span only the search depth, i.e. at most they'll pick something that improves their mobility (or reduces opponents) within the search horizon, perhaps 8-12 plies ahead (or wherever the end of capture/check extensions was). That kind of short term positional plan is not very hard to see and work against. But with Hiarcs I often find my position squeezed out of any counter-play, with nothing good left to move, but without ever noticing how did it happen, when did it start. So it is more subtle than usual short term contest for mobility as you see in other programs. Hiarcs somehow considers the potential long term paths of pieces and makes moves which cut or undermine your piece paths well ahead the time they become interesting in a short term tactical calculations. If I get that CM 6666 setting, I'll check it out just to see whether the regular evaluation parameters adjustments in a regular alpha-beta searcher can simulate such behavior.
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