Author: Roy Brunjes
Date: 11:08:49 04/27/03
Go up one level in this thread
On April 27, 2003 at 04:58:59, Drexel,Michael wrote: >On April 26, 2003 at 20:18:23, Uri Blass wrote: > >>On April 26, 2003 at 19:15:04, Drexel,Michael wrote: >> >>>Today I started an interesting experiment. >>>A match Chessmaster 9000 against Shredder 7.04 in Chessbase GUI with >>>over-optimistically settings for The King 3.23. >>>With this settings The King engine evaluates his positions almost always as >>>better for himself, except it is completely lost. >>> >>>Surprisingly a 30 game match ended: >>>Chessmaster 9000 - Shredder 7.04: 15.5-14.5 (+12 =7 -11) >>>5 min, AMD 2200+, ponder off, Remis.ctg, alternate colours >>> >>>I told The King that the own qeen is better than the opponents qeen, the own >>>rooks are better than the opponent rooks, the own bishops are better than the >>>opponent bishops and so on... >>> >>>Its over-optimistically evaluations dont hurt at all. >>> >>>The evaluations were way off but it nevertheless won the match and played a lot >>>of exciting games although it lacks resistance in worse positions. >>>Chessmaster played very strong in positions it had an advantage. >>> >>>Therefore I think it should be a good idea to have completely different >>>evaluations. >>>For clearly better positions an optimistically evaluation (Shredder obviously >>>has very high scores in such positions) and for worse positions a more realistic >>>evaluation. >> >>What is your definition os optimistically evaluation >>If you multiply the score by 2 when you have a clear advanatage then you also >>can describe it as an optimistically evaluation when you have a clearly better >>position. > >Slightly better scores for own material and most important: >High scores for positional factors (Mobility for example). >Sometimes there is in fact no real compensation for the material and the >programs lose badly (a pawn or an exchange down in the endgame) but this seems >to work very often. > When I created my "Junior" personality, it was precisely this type of engine that I was trying to create. Your settings so far seem better (i.e. stronger) than my Junior settings. You note that your version sometimes loses a pawn or exchange, for what turns out to be no valid reason. I saw the same thing with my Junior personality. I'm glad yours is turning out to be aggressive *and* strong! Even if it turns out to be just slightly weaker than CM9K_SKR, it is still a valuable addition to the stable of CM9000 personalities! Roy
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