Author: Andrew Dados
Date: 00:44:58 08/14/00
Go up one level in this thread
On August 14, 2000 at 03:41:29, Andrew Dados wrote: >On August 13, 2000 at 16:47:33, Ed Schröder wrote: > >>On August 13, 2000 at 05:23:42, Colin Frayn wrote: >> >>>On August 13, 2000 at 05:17:29, Colin Frayn wrote: >>> >>>>Take this position for example; >>>> >>>>[D]4Q3/2p3p1/7p/p1k1B3/2p1P2P/2P3P1/1r2q3/6K1 w - - >>>> >>>>which ColChess searches *fully* to depth 13 ply in just over 3 seconds on my >>>>p3-450. It is a mate in 9. Crafty sees the mate quite early because of its >>>>advanced extensions, but after 30 seconds had still only just reached 11 ply in >>>>its search. There are probably better examples where Crafty can't see the mate, >>>>and I unfortunately can't remember the board setup before this position, which I >>>>know to be one of them. >>> >>>OK I found the game. This is one position. Unfortunately Crafty again sees the >>>mate using its impressive extension code, but ColChess manages to search 18 full >>>ply *completely* plus seeing the mate immediately at 19 ply in 46.7 seconds. >>>After this time, Crafty has just started searching the 13th ply. See how Faile >>>does. >>> >>>[D]6Q1/2p3p1/5k1p/p3n3/2pBP2P/2P3P1/1r2q3/6K1 w - - >>> >>>Qf8+ is mate in 12. >>> >>>Cheers, >>>Col >> >>There are other (cheap) ways. Rebel handles these cases in Q-search. >> >>00:00:00 04.00 Mate in 12 moves 1.Qf8+ Ke6 2.Qe8+ Kd6 3.Bxe5+ Kc5 >> >>Ed > >To be picky... my program says mate in 8. Ohhh... forget it - wrong fen... -Andrew-
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.