Author: leonid
Date: 12:59:39 04/13/02
Go up one level in this thread
On April 13, 2002 at 15:15:07, John Merlino wrote: >On April 13, 2002 at 14:49:12, leonid wrote: > >>On April 13, 2002 at 14:36:31, John Merlino wrote: >> >>>On April 13, 2002 at 07:49:31, leonid wrote: >>> >>>>Hi! >>>> >>>>Recently I found that for many programs selective search for mate is pretty >>>>different. At least, in few recent mate positions my default selective was >>>>useless. I am curious to see how many other programs can solve this position by >>>>selective. Mine was useless on this even if it look like to be ideal for >>>>selective. Position in itself is not deep, or very difficult. >>>> >>>>[D]1qbqkbq1/QBRNBNQ1/1QnQpQn1/1q1RQ1p1/3rn3/2Q2Q2/Q6K/1r4r1 w - - >>>> >>>>Please indicate your result, never mind your way of solving this mate. >>>> >>>>Thanks, >>>>Leonid. >>> >>>I don't know if it's the shortest mate, but it took Chessmaster a long time (on >>>a PIII-733) to find Mate in 10 anyway (with some HUGE evals along the way), as >>>the first seven moves are all non-checking moves: >> >> >>So, actually Chessmaster took this position by selective and not that far from >>shortest one. Pretty good! >> >>This position is mate in 9 moves. >> >>Cheers, >>Leonid. > >I'm trying Chessmaster's Solve for Mate mode. It finished depth 8 in just a few >minutes, but is taking quite a long time to finish depth 9. It still hasn't >announced mate in 9, and it has been going for almost 40 minutes on my PIII-733 >(over five minutes longer than it took to announce Mate in 10 via selective >search). What is exactly "Mate mode"? Is this forced mate, in other words search that look for every possible mate and miss no mates? And how you indicated before to your program to look for mate? I remember Chessmater 4000 as very good mate solver but I don't remember exactly if its mate look like to be forced mate, or selective, or just both in sequence. Few solutions that were presented here were quick and were found on Chessmater 8000. I am almost sure that they were found by selective search. My program also felt big jump in branching factor between 7 and 8 move. It went to 13.09 after being just before this only 6.3. It could be that later, between 8 and 9 move, branching became even worst. What happened later I don't know. My program stop just after first solution. Leonid. >jm
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.