Author: Peter Berger
Date: 17:51:23 09/04/01
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On September 04, 2001 at 19:16:29, leonid wrote: >Solution time is excellent! > >Chessmaster 8000 for sure found mate by selective and its selective search is >very effective. But how about brute force search? I am curious to know how he do >on this sense. > >To spot its brute force search (just my suggestion) find what is the Chessmater >time for 8 moves for the first position and in 12 moves for the second. In both >he will not find the mate but probably will end by searching by brute force. > >If you could indicate its brute force search for two close moves (for 7 and 8 >moves deep, for instance) it will be very revealing. This will permit to see his >branching factor for this kind of search. > >Some programs are very efficent in brute force search but not that tuned for >selective. The best brute force searcher that I saw here until now was Heiner's >mate solver. His time is close to miracle. > >Cheers, >Leonid. > Hi Leonid, to the best of my knowledge Chessmaster 8000 can't be set up to do a "brute force search" by an ordinary user - don't forget : it isn't a mate solver but a normal chess playing program. So Chessmaster's results are always "selective search". Chessmaster 8000 seems to be the best when it is about "selective search" so far : if it is about your positions with zillions of queens and other pieces - or more regular ones ( like in the chess newspapers) . Chest is without competition itself when it is about "brute force search " - I definitely agree ! Although it's not that bruce force at all - Heiner Marxen will use some neat tricks to improve his "brute force" results : and my impression was that many of them never would be thought of as brute force anyway . For example Chest does pruning ( to my _very_ miserable understanding at least ) . And - Heiner said he is or will be working on his "selective search" soon , too . So I expect Chessmaster to be up for some thrilling competition when he is ready :) ! Cheers, pete
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