Author: leonid
Date: 13:40:44 06/02/02
Go up one level in this thread
On June 02, 2002 at 15:54:40, Heiner Marxen wrote: >On June 02, 2002 at 08:20:52, leonid wrote: > >>On June 02, 2002 at 05:20:35, Tim Foden wrote: >> >>>On June 01, 2002 at 08:45:35, leonid wrote: >>> >>>>[D]Kn4QQ/RNQQQQQ1/nqrqqp2/qNRQq3/kBBp4/rbq5/Pb6/q7 w - - >>>> >>>>Please indicate your result. >>> >>>GLC 2.18, 24MB Hash, AXP 1.46GHz, finds that Bxb3+ is a mate in 10 after 21.04 >>>seconds. >>> >>>Cheers, Tim. >> >>Thanks, Tim! >> >>Since I see that you found mate at 10, I will try later at the same depth but >>with much deeper selective. Before I used my usual, almost default selective >>that make search at reasonable time. It is "mixed search" where initial brute >>force search goes the most 3 moves deep (6 plys) before switching to "real >>selective". I will try later to search 4 and 5 moves (8 and 10 plys) by brute >>force before starting "real selective". >> >>Cheers, >>Leonid. > >And according to Chest there is no mate in 9 (2 hours on K7/600, 350 MB hash). >Since the EBF has increased up to above 18 in the last 2 depthes, it may >take some time for Chest to complete depth 10. I'll follow-up, then. >But so far it appears to be a mate-in-10 for sure. Thanks, Heiner! Now I know for sure that it is mate in 10. It could be useful for me to know exact depth in the future. When I write something, I do use my old positions (and many positions from books) for finding bugs. If one day my program will find here mate in 9, then I will know that I must look into my code. My branching factor jumped so much on this position that 8 moves took already 1 hour to see it. I stopped right there. Branching between 7 and 8 moves was 24. Cheers, Leonid. >Cheers, >Heiner >>
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