Author: Robert Hyatt
Date: 10:52:39 09/22/05
Go up one level in this thread
On September 22, 2005 at 07:09:03, Uri Blass wrote: >On September 22, 2005 at 07:00:13, Paul Jacobean Sacral wrote: > >>On September 22, 2005 at 05:39:07, Mahesh Jeswin wrote: >> >>>Only Fruit 2.1 seems to find the draw in this position without egtb. >>>Any other engine comes close to finding the draw ? >>> >>>[D] 7k/7P/8/6N1/7K/8/8/8 w - - 0 1 >> >>I didn't find any! Good test position. At least engines which do not use egtb in >>the search, should probably have code for that type of position, or a "no >>progress" rule. Engines quickly reach depths of 20+ in this position. With a >>material balance of +4 and no progress at all after 20 plies, it is most >>probably a dead draw. I think that could be a "safe" rule, if the opponent has >>only the king (maybe even 10 plies are enough already, in those cases). >> >>Yours truly Paul J. Sacral > >Fruit does not see 0.00 and I am surprised that it can see close to 0.00 score > >New game, >7k/7P/8/6N1/7K/8/8/8 w - - 0 1 > >Analysis by Fruit 2.1: > >1.Kg3 > ² (0.35) Depth: 1/1 00:00:00 >1.Kg4 > ² (0.36) Depth: 1/1 00:00:00 > >Note that Fruit2.0 is even better here and can see 0.00 score > >New game, >7k/7P/8/6N1/7K/8/8/8 w - - 0 1 > >Analysis by Fruit 2.0: > >1.Kg3 > = (0.00) Depth: 1/1 00:00:00 > >I did not know that fruit had that knowledge because I did not think that it is >an engine that has special knowledge for a case that almost never happen >considering the fact that it has no big evaluation. > >Uri I assume it is a special position test with pawn on 7th, where the king can't be driven out. Most all K+RP+N positions are wins, until you get down to this position where the king can't be driven out because of the pawn attacking g8. I wouldn't think about this position, since if you give a reasonable program an earlier position, it will win easily without reaching this position...
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.