Computer Chess Club Archives


Search

Terms

Messages

Subject: When do you expect KRR vs KRP tablebases?

Author: Uri Blass

Date: 02:39:18 02/17/01


These tablebases are needed to evaluate the game between Deep Fritz and Germany.

[D]8/8/kr6/8/8/P1PK3R/6r1/8 b - - 0 1

In this position Germany played Rb3.

Eduard Nemeth claimed that Rb3 was a mistake and better was Kb5 or Ra2.
Is he correct.

What is the evaluation after 65...Rb3 66.Kc4 Rxa3 67.Kb4?

Can somebody create tablebases under the assumption that if the pawn get into c8
it is a win for white.

In this case you only need to create 5  different tablebases

Tablebase 1 wrong tablebase when the white pawn is at c7.

The wrong tablebase will give a wrong evaluation of mate for white in the
following position.

[D]5r1r/2Pk4/8/8/2R5/8/8/K7 w - - 0 1

Tablebase 2:wrong tablebase when the white pawn is at c6 but tablebases that are
right in more cases

Tablebase 3:the same when the pawn is at c5

Tablebase 4 and 5:the same when the pawn is at c4 or c3.


This tablebases can give wrong score for white but have no chance to give wrong
score when the score is mate for black.

They can be useful for the game and they need less time and memory than
creating the KRQ vs KRR, the KRR vs KRR,the KRB vs KRR and the KRN vs KRR
tablebases.

Uri



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.