Author: Larry Griffiths
Date: 05:46:01 09/06/00
Go up one level in this thread
On September 06, 2000 at 07:34:48, leonid wrote: >Hello! > >Please, solve this position and say how much difference your hash table did. > >Indicate any parameter of your search that you consider important. > >It is pretty normal position from the book. > > kb6/B3P3/K1P5/p7/P7/3r4//8/8 w Here is what I got for this position... HashTable is 8 meg. Extracted bm= 00:00:00.031 2 - -3000 Bxb8 Kxb8 ? ? ? ? ? ? ? ? ? ? 00:00:00.046 2 - 5000 e8 Rd1 ? ? ? ? ? ? ? ? ? ? 00:00:00.046 2 - 5000 e8 <---------- 00:00:00.109 3 - 8000 Bxb8 Rd1 e8 Kc7 Qxd8 ? cxd7 Kc7 Qg8 ? ? ? ? 00:00:00.109 3 - 8000 Bxb8 <---------- 00:00:00.171 4 - -1000 Bxb8 Re3 e8 Rxe8 Bxe5 ? Qf5 Rxb3 Qxd3 Kxc6 ? ? ? ? 00:00:00.187 4 - 5000 e8 Rb3 Bxb8 Rxb8 Qxc6 Kxb8 Qb7 ? Qa7 ? ? ? ? ? 00:00:00.203 4 - 5000 e8 <---------- 00:00:00.312 5 - 2000 Bxb8 Re3 Bd6 Re6 e8 Rxe8 e8 Rxe8 Kb4 Rxc7 Nxc3 ? ? ? ? 00:00:00.406 5 - 77777771 e8 Rb3 c7 Rb6 Bxb6 ? Qxb3 Rxb7 e8 Kd7 Qxd6 ? ? ? ? 00:00:00.437 5 - 77777771 e8 <---------- 00:00:00.531 6 - 0 Bxb8 Re3 Kxa5 Kxb8 c7 Kc8 e8 Rxe8 e8 Rxc8 axb5 ? ? ? ? ? 00:00:00.750 6 - 77777771 e8 Rb3 c7 Rb6 Bxb6 ? Qxb8 ? axb5 ? Bxg3 ? ? ? ? ? 00:00:00.812 6 - 77777771 e8 <---------- 00:00:01.234 7 - 3000 Bxb8 Re3 Bd6 Re6 Kxa5 Re1 e8 Kxb8 cxd8 ? Kb4 Kxc7 Kxa6 ? ? ? ? 00:00:02.390 7 - 88879990 e8 Rb3 Qd7 Bc7 Qc8 Bb8 Qb7 Rxb7 cxb7 ? ? Rxa4 Qb7 ? ? ? ? 00:00:02.531 7 - 88879990 e8 <---------- Elapsed Time= 2.53 seconds > >My solver could not resolve it by selective search and went paintful 24 sec (AMD >400) before finding the mate. Mine have no hash tables. When I went to see it on >Rebel 10, I was impressed. His time in solving the position knew around 6 fold >improvement between solution without hash and with it. His hash was 28 M. > > q1bkb1q1/2nqn3/1BrnrB2/1R1Q1R2/1NNQNN2/2Q1Q3/2QQQ3/3K4 w > >This last, is the fantasy position. Did it yesterday. Also could not solve it at >minimum number of moves by selective search. It took lengthy 18.5 min to reach >minimum number of moves for mate by brute force. Selective search can reach it >only if one move more is permitted. Then it take it in 2 sec. But how much hash >table could help in this position? > >Thanks, >Leonid.
This page took 0 seconds to execute
Last modified: Thu, 15 Apr 21 08:11:13 -0700
Current Computer Chess Club Forums at Talkchess. This site by Sean Mintz.