Author: Heiner Marxen
Date: 14:28:13 06/02/02
Go up one level in this thread
On June 02, 2002 at 16:40:44, leonid wrote: >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. Mine was slightly better, so far: # 3 0.01s 1kN [ 9.22] 0.93 74- 0 # 4 0.07s [ 7.00] 4kN [ 5.29] 1.02 509- 0 # 5 0.49s [ 7.00] 28kN [ 7.80] 1.14 3169- 0 # 6 2.88s [ 5.88] 168kN [ 6.05] 1.39 13961- 0 # 7 25.72s [ 8.93] 1616kN [ 9.63] 1.64 120110- 0 # 8 412.67s [ 16.04] 28303kN [ 17.51] 1.92 1825814- 32 # 9 7533.33s [ 18.26] 524949kN [ 18.55] 2.03 33174075- 24426174 But it may jump once more for depth 10, we'll have to wait and see. Cheers, Heiner
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