Author: Uri Blass
Date: 05:04:37 05/05/05
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On May 05, 2005 at 06:01:02, Mike Hood wrote: >On May 04, 2005 at 11:16:55, Uri Blass wrote: > >>On May 04, 2005 at 09:09:25, Robert Hollay wrote: >> >>> I'd like to download some freeware engines, which are weaker >>>by default (say 1200-1600 ELO), with WB or UCI interfaces, but have >>>an interesting or "human-like" playing style. >>> Yes, there is a plenty of links to free engines on chess sites, >>>but I have small bandwith, so cannot download and try out each ... >>> >>>Thanks in advance for any help or suggestion! >>> >>>Robert >> >>Why do you need weak by default? >> >>It is possible to change the personality of Movei to make it weak. >>I guess that if you change the piece square table of Movei to tell it that a >>queen is less than a pawn and that knights have negative value it will do the >>trick(I never tried it but people who are interested in doing it can do it). >> >>Uri > >Uri, the question is "How can I make an engine beatable without making it play >stupid?" There are a few answers to this question: > >1) Write an engine which has a weak evaluation algorithm, for instance by not >giving it much positional information. (I think this is what Robert was looking >for). > >2) Make slight changes to piece values. For instance, change a Knight's value to >2 (instead of 3) to encourage the computer to make spectacular looking but often >unsuccessful sacrifice exchanges. Changing a Queen's value from 9 to less than 1 >would be too drastic. considering the fact that you talk about weak level of 1200-1600 I think that changing the queen value to less than 1 may not be too drastic. I guess that players with rating of 1200 may lose even if they get queen for knight advantage if they face good defence and a computer that does good search will not give them an easy way. Uri
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