Author: leonid
Date: 14:12:20 07/14/01
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On July 14, 2001 at 13:57:52, Heiner Marxen wrote: >On July 14, 2001 at 09:38:20, leonid wrote: > >>Hi! >> >>If you like to solve a mate then you have one position. >> >>[D]qr1b1rq1/P1P1P1P1/1q1k1q2/Q1RbR1Q1/1N1q1N2/1QnQnQ2/q1pKp1q1/3B4 w - - >> >>Please indicate your result. >> >>Thanks, >>Leonid. > >According to Chest, there is no mate in 9 (4 min on K7/600, 350 MB hash). >With an effective branching factor around 5 I will go one move deeper, >which will take 4 hours or more... You have obviously better branching factor that me on this position. Even without hash my should do better. Between 7 and 8 move (brute force) my branching factor was 8.8. For this position it tend to deminish with depth. Probably it is related with promotion of pawns. Will try to see it more closely on other positions. This positions is for sure mate in 10, since you verified mate in 9. Mine solved it by selective in 10. In dispite of very easy and simple parameters, mine found mate only after 10 min and 55 sec search. I for sure must work on my program but for now I wait for 64 bits Intel. It is almost with us! Once I will have the money and it will be more accessible, new and exciting programming could start! I do expect that many people here will come with many interesting development because of this new chip. Cheers, Leonid. >Cheers, >Heiner
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