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Subject: Re: Two knights endgame

Author: Vincent Lejeune

Date: 10:59:04 04/01/00

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On April 01, 2000 at 08:18:51, Frederic Friedel wrote:

>Amazingly it never occurred to anyone -- Thompson, Stiller, Nalimov -- to run
>through the ending K+N+N vs K. Everyone assumed it was simply a draw in every
>case. Well, fire up your Nalimov tablebase generator and prepare for a shock! In
>over 10% of all legal positions the attacking side can forced a mate in 31 to 48
>moves. It is difficult to do anything systematically with the tablebase after it
>has been generated (except play against them), but as far as I can tell the
>attacking side can force a win if the defending king is on one of the squares
>a1, b1 or a2 and the attacking king and at least one knight is within the square
>a1-d1-d4-a4. Naturally this can be reflected in all four corners of the board.
>Some  of the mates are wonderfully intricate and involve forcing the king to
>move to a4 (or d1) and back again to a1. John Nunn is studying the ending and
>will provide a better statistical evaluation soon.

When I was responding to this message, I have a revelation :

It's the 1st of April !!

happy jocking day ! :)))



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