Author: blass uri
Date: 04:23:41 03/08/99
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On March 08, 1999 at 02:19:57, Dann Corbit wrote: >On March 06, 1999 at 14:59:14, blass uri wrote: > >>3r1r1k/2n1Qp1p/1q2pNpP/p3P3/1ppp4/3P2P1/PP3Pb1/R3R1K1 w - - 0 1 >> >>Ne8 is mate in 10. >> >>It is easy for programs to find Ne8 but it is hard to find the mate. >> >>CM6000 sees mate in 10 in 3 minutes on pentium200MMX. >>My other programs are significantly slower and I do not know their time. >Crafty failed after 15 minutes on a PII 300 (and I have most of the tablebase >files). CM6000 must be doing some very clever singular extensions, since 20 ply >is quite a distance to cover in 3 minutes. What is the correct mating sequence? 1. Ne8 Kg8 2. Nxc7 Rfe8 3. Nxe8 Ra8 4. Nf6+ Kh8 5. Qxf7 Qb7 6. Nd7 Qxd7 Is CM6000's line. It does not show more moves after it 7.Qxd7 Rg8 8.Qf7 is a simple mate in 3 CM6000 with ss=10 can see mate in 10 in 26 seconds I asked some personalities of CM6000 and most of them could find mate in 10 in time close to 3 minutes: some times: Anand 3:14 Botvinik 2:51 capablanca 3:00 Euwa 3:06 Fisher 3:07 karpov 1:23 Kasparov 1:24 polgar 2:56 only alekhine failed to see mate in 10 and found only mate in 11 after 8 minutes. Uri
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