Author: Chessfun
Date: 11:39:27 02/12/06
Go up one level in this thread
On February 12, 2006 at 11:26:49, Barry Culp wrote: > After running several engine matches using the 20 position endgame suite >suggested by Sune Larsson >(http://www.talkchess.com/forums/1/message.html?485148) I decided to concentrate >on one position and run a double round robin tourney with 3 different EGTB >setups : One tourney with no EGTB's, one with all the common 3-4-5 man EGTB's, >and one with some 6 man EGTB's added to the 3-4-5. > >[D] 8/4k3/p1B4p/2K5/1P4bP/8/8/8 b - - 0 1 > >The comments that came with this position are : > >"Eliskases-Capablanca, Semmering 1937. Another classic ending. White has >little trouble winning the a-pawn, but will this be enough to win the game? >White is handicapped by the fact that his bishop is the wrong colour for the >h-pawn, so even winning Black's bishop may not be sufficient. In the game >White won, but various analysts who have examined this ending in detail have >come to the conclusion that Black should draw with accurate play. But if even >the great Capablanca could not find the draw, can a machine? " > >The 3 double round robin tourneys consisted of 20 games each, 5 engines: >Rybka beta 13b-x64, Fritz 9, Fruit 2.2.1, Hiarcs 10, and Deep Shredder 9.12-x64, >all engines that support EGTB's. Time control of 15 min + 0 was used. >In each tourney, every engine played the above position 8 times, 4 times as >black and 4 as white. Results comparing white v black winning percentage >in the 3 different tourneys : > > Tourney #1 : no EGTB's > > White - +8/-0/=12 70.00% 14/20 > Black - +0/-8/=12 30.00% 6/20 > > Tourney #2 : 3-4-5 EGTB's > > White - +10/-0/=10 75.00% 15/20 > Black - +0/-10/=10 25.00% 5/20 > > Tourney #3 : 3-4-5-6 EGTB's > > White - +15/-0/=5 87.50% 17.5/20 > Black - +0/-15/=5 12.50% 2.5/20 > >White's winning percentage increased as EGTB's were added. Specific EGTB's >that probably played a role are 4 man KBp.K, 5 man KBp.KB, and 6 man >KBp.KBp + KBpp.KB . Can one conclude from the small number of games (60) >that EGTB's made a difference in engine play for this particular position ? > >Barry Thanks Barry interesting. We at CCRL have also had some debate on the subject of adding various 6 men tablebases to the testing when it begins. What specific 6 men did you use? I do find the scores interesting and wonder if at longer time controls those kind of differences between tablebase types would hold. Personally I think you can conclude that EGTB's made a difference in the position as that is what the results indicate. It should be a really interesting project once we get it going. Sarah
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.