Author: Bruce Moreland
Date: 16:21:44 06/25/98
Go up one level in this thread
On June 25, 1998 at 14:04:47, Johanes Suhardjo wrote: >On June 18, 1998 at 13:35:47, Bruce Moreland wrote: >>I don't know what is going on here either. Mine gets Ra3 in < 1 second on a >>P6/200, with a score of +2, has +4 in 6 seconds, and has +7 in 38 seconds. >> >>Is this because Fritz is doing null move in K+P endings or something? >> >>bruce > >Wow! How did you guys do it? It is a 9-ply sequence, isn't it? Do your >programs finish 9 plies in less than 1 second? My program on a 170 MHz >Sun Ultra 1 can't find it even after 11 plies in zillions of seconds. It >was too involve in enjoying itself with the lines after e5 fxe f4 etc. Mine finds it in ply 9, yes. On a P2/300, finished 11 plies in < 1 second, finished 15 plies in < 10 seconds. 9 plies takes maybe 112,000 nodes. I did maybe 162,000 nps on this position for this period of time. I don't know why yours has trouble. In this ending I think I'm still doing null move R=2, which is good for a few plies, sometimes more than a few, I think. But I'm not doing anything tricky in this ending (no weird pruning or strange extensions, nothing that matters more than maybe 20%, is my guess), I bet Crafty also goes pretty fast, and you can get the source for that. Once you find the right move, and the score goes through the roof, you can go like blazes since you get a lot of cutoffs. bruce
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.