Author: Heiner Marxen
Date: 07:26:58 05/19/01
Go up one level in this thread
On May 19, 2001 at 08:36:17, leonid wrote: >On May 18, 2001 at 22:03:13, Heiner Marxen wrote: > >>On May 17, 2001 at 13:50:30, leonid wrote: >> >>>Hi! >>> >>>If somebody would like very easy mate, then this veriation from this first is >>>exactly this. >>> >>>[D]qr3rqB/3k3B/N1qqq1NQ/Q1n1n2Q/1qQ1Qq1Q/2RNR2Q/Q2K3b/1q3q1b w - - >>> >>>Please indicate your result. >>> >>>Thanks, >>>Leonid. >> >>Mate in 8. Two key moves. On K7/600 with 350 MB hash Chest after 441.12 sec >>(7.4 min) mutters: > >Excellent! Mine by brute force reached first solution (not all) in 4 min 10 sec. > >> >>Nxc5+ Qbxc5 Nxe5+ Qfxe5 Q6xe6+ Qdxe6 Nxc5+ Kc8 Qhxe6+ Qcxe6 Qxe6+ Qexe6 >>Qexe6+ Qxe6 Qxe6# >> >>Nxe5+ Qfxe5 Nxc5+ Qbxc5 Q6xe6+ Qdxe6 Nxc5+ Kc8 Qhxe6+ Qcxe6 Qxe6+ Qexe6 >>Qexe6+ Qxe6 Qxe6# >> >>As often, symetric solutions to a (nearly) symetric problem. >>Timing info reveals that Chest does feel quite comfortly: >> >>depth seconds >># 3 0.02 0.96 72- 0 >># 4 0.24 1.12 667- 0 >># 5 2.05 1.28 6153- 0 >># 6 13.72 1.53 44092- 0 >># 7 79.46 2.02 265586- 0 >># 8 441.02 2.70 1524472- 9 > >Here I am confused. What is your node/per/second for 8 moves? The above numbers were intended to show the effective branching factor. The "nodes" above are "generated hash table entries", not searched positions. Those can be seen (indirectly) from the numbers below. >Mine is 93k per second when it looked 8 moves deep and by brute force. I am so >exact in indication since search 7 moves deep, for instance, give different >number. It is 152k. NPS for 5 and 6 moves deep is also different. Strange but >true. > >Cheers, >Leonid. > >> >> white black quotients >>mvx 8: 32 38 [ 32.000 1.188] 39 >>mvx 7: 708 722 [ 18.632 1.020] 91 >>mvx 6: 7324 8085 [ 10.144 1.104] 185 >>mvx 5: 57939 69121 [ 7.166 1.193] 1052 147 >>mvx 4: 423641 537738 [ 6.129 1.269] 5565 198 >>mvx 3: 2906635 3507479 [ 5.405 1.207] >>mvx 2: 14814509 2992977 [ 4.224 0.202] >>mvx 1: 275837 0 [ 0.092 ] Summing the above move numbers (every move makes a new position searched) I get 25602785 / 441.02 = 58054 N/s. Heiner >>Also, black likes to deliver mate-in-1 to white: >>anti: 2529687 try, 1637033 lists [64.71%], 2376273 moves [93.94%], 1461034 succ >>[57.76%] >> >>Cheers, >>Heiner
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