Computer Chess Club Archives


Search

Terms

Messages

Subject: Re: Two Rook Endgame Test Positions [Baron-Arasan]

Author: Dieter Buerssner

Date: 13:32:19 05/16/04

Go up one level in this thread


On May 16, 2004 at 11:14:05, Jon Dart wrote:

Thanks for all the answers.

>These positions were from the end of a 15 1 game,
>and Arasan was having to blitz.

I did not want to critisize Arasan (or Baron). It just happened, that I followed
the game, and saw the score going to drawish and then to winning score for Baron
again. Then I downloaded the game, and had a look at the end where this
happened.

>In the 2nd position, Arasan switches and sticks to Kc3
>after about 16 seconds with or without tablebases, and
>gives a zero score after 45 seconds (I only have 5-man
>tablebases).

I think, 6-men TBs cannot help here. 5-men do (especially KPPKR). The 6 men
positions that will arise in search, should be easy to evaluate (either white
wins a pawn, or somebody blundered in the way, or - the interesting ones -
immediate recapture, which yields in a 5-men pos).

> But it didn't have 16 seconds in this game.

No doubt, under the game conditions, this was difficult to find. Even more
difficult to find will be, that Kc3 really is much better than the rest (takes a
*long* time for my engine, when I search for the second best move, to see a good
score for white without TBs).

>The 1st position (find Rb6) is a lot harder for Arasan.

Without TBs, Yace needs about 10 minutes to find Rb6 (0.01 score ...) and ~100
minutes to see a score > 2 (Shredder Paderborn finds Rb6 on my computer in about
90 minutes, and still shows only +0.39 after 250 minutes). The analysis of
Baron, that Richard just posted is much faster.

Regards,
Dieter



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.