Author: leonid
Date: 19:09:28 05/15/01
Go up one level in this thread
On May 15, 2001 at 21:30:59, Heiner Marxen wrote: >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: To be sincere, Heiner, I even more impressed by your solver. It is only a pitty that it is hidden of its clumsy shell. Without any doubt the best mate solver ever! I hope that some programmer will come with graphics and very soon. This will make it instantly accessible and popular with everybody. The most difficult and laborious part of mate solver is already accomplished. And we have here so many people that are very prolific in C and graphics! I hope somebody is listening... I indicate first mate in 9 moves. Revision for 8 moves took already 1 hour and 19 min. Complete revision for 9 moves can be expected, after branching factor, in around 11 hours. Cheers, Leonid. >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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