Author: Heiner Marxen
Date: 18:30:59 05/15/01
Go up one level in this thread
On May 15, 2001 at 16:57:46, leonid wrote: >On May 15, 2001 at 16:38:22, Dann Corbit wrote: > >>On May 15, 2001 at 06:30:34, leonid wrote: >> >>>Hi! >>> >>>If you would like to solve one simple mate then you have one. >>>[D]1qbBBbq1/1Q5r/R2Nq1P1/2Q1N1n1/KQ2q1rk/2Q1N1n1/R2Nq1P1/1Q5r w - - >If this position should be solved by brute force, and not by selective, then >position is slow for me as well. To give you right idea, will say my numbers. >Celeron 600Mhz. Mate solver with no hash. Selective, 9 moves - 2 seconds. Brute >force, 9 moves - 1 hour 23 min. This position is mate in 9 moves. Wow, this time I'm impressed by _your_ time. Chest (K7, 600MHz, 350MB hash) needs 6595.53 sec (109.9 min) (1.8 hrs) for the mate 9. It finds 2 key moves: Nef5+ Kh5 Nxg3+ Rxg3 Qxh1+ Rh3 Qcxh3+ Qxh3 g7+ Qg6 Bxg6+ Kh6 Ndf7+ Nxf7 Qf4+ Kxg7 Bf6# Qxh7+ Qxh7 Nef5+ Kh5 Nxg3+ Rxg3 Qxh1+ Rh3 Qhxh3+ Qxh3 gxh7+ Nf7 h8=Q+ Bh6 Bxf7+ Qg6 Bxg6# Does your program stop immediately after it found the first solution, or does it continue to search for other key moves? If it stops, it may have been "lucky" compared with Chest, which normally searches all key moves. Here is my depth/time info: # 1 0.00 0.87 1- 0 # 2 0.00 1.00 1- 0 # 3 0.04 0.97 102- 0 # 4 0.33 1.03 1430- 0 # 5 2.46 1.18 11330- 0 # 6 17.65 1.34 86730- 0 # 7 100.17 1.56 504249- 0 # 8 748.69 1.70 3893999- 5441 # 9 6594.79 1.79 34480030- 25732129 Cheers, Heiner
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