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Subject: Re: Junior 4.6 and the null move technique

Author: Christophe Jolly

Date: 16:14:14 03/18/98

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>Unfortunately, others parameters biased the result. So here is another
>position given by Chrilly Donninger in his famous paper from ICCA
>Journal, Sep 93:

>White:
>Pawn b4
>Rook d4
>King f2

>Black:
>Pawn a6 b5 h2
>Rook g6
>King h1

>White to move. The key is 1.Rd1+, which is mate in 7. After 1...Rg1,
>black is in zugzwang. White plays for example 2.Rf1, and wins.

Virtual Chess 1 finds the mate at ply 8 in less than 1s (K6 200 70kb
Hash)

Techno Chess (my prog) finds the mate at ply 8 in 1s (K6 200 640Kb Hash)
It plays Rd1+ since ply 5 (-2.75 Rd1 Rg1 Rf1 a5 bxa5 b4)

The last one use null move. the first one probably does.

Christophe Jolly




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