Author: blass uri
Date: 05:33:27 06/10/00
Go up one level in this thread
On June 10, 2000 at 06:28:27, leonid wrote: >On June 09, 2000 at 23:57:18, James Robertson wrote: > >>Insomniac 0.64 on my P233 with a 4MB hash table switches to Qb7 in 167 seconds. >> >>Depth Score Time Nodes PV >> 1 470 0 41 fxe6 >> 2 464 50 264 fxe6 fxe6 Qxe6 Kh2 >> 3 454 220 1688 fxe6 h6 gxh6 gxh6 >> 4 368 270 8706 fxe6 fxe6 Qxe6 Bxg7 Kxg7 Qd4+ Kg8 Qxd1 >> 5 369 380 16231 fxe6 fxe6 Qxe6 Bxg7 Qe3 Qd4 Qxa3 Qxd1 Kxg7 Qxd5 >> 6 375 600 42821 fxe6 fxe6 Qxe6 Bxg7 Kxg7 Qd4+ Kg8 Qxd1 Qe4 >> 7 351 1590 131221 fxe6 Qe5 Qd7 h6 exf5 Qxg7+ Qxg7 hxg7 Kf7 Kf4 >> 8 259 6920 629363 fxe6 f6 Rc8 fxg7 Nc3 Qe5 Nb5 Bb2 >> 9 203 18340 1685714 fxe6 f6 Qb7 Qd2 Qa6 Qxd1 gxf6 gxf6 Qxa3 Kh2 Rc8 >>10 203 25320 2293453 fxe6 f6 Qb7 Qd2 Qa6 Qxd1 gxf6 gxf6 Qxa3 Kh2 Rc8 >>11> 126 167130 14779415 Qb7 Qc1 fxe6 f6 Qf7 Ne5 Qxh5 f7+ Kf8 fxe8+ Kxe8 >>11 126 186580 16418091 Qb7 Qc1 fxe6 f6 Qf7 Ne5 Qxh5 f7+ Kf8 fxe8+ Kxe8 >>Extensions: 910044 check, 429 mate, 154399 recapture. >> >>James > >Hi! > >The most interesting for me is the last line. I hardly ever look into details >that you indicated before. > >Please, say me how far your extensions look ahead, or just, in general, how far >ahead it goes. What kind of extensions find the needed move? If you can, say me >how long it could take with your logic, without extensions and hash table go 12 >moves ahead in brute force search. Average nodes/second for your logic or some >other that you can reach. > >For me "extensions" is the scond etape. I am still not there. Efficency of >extensions I could see in this position, since Hiarcs found needed solution in 8 >moves search. Only those extensions are more that heavy extras for the logic as >well. Hiarcs search with extensions 8 (other way to say those numbers is also 4) >in 14 minutes and 58 sec. Mine take without extensions (no hash) in 9 seconds. >Question for me is: What is the best to do? Extensions, or just next few ply >search? > >Leonid. It is clear that searching with no extensions and no pruning for a fixed depth is not a good idea. There is no top program that does it. Uri
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