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Do not claim repetition after null move
authorMarco Costalba <mcostalba@gmail.com>
Wed, 7 Oct 2009 08:03:17 +0000 (09:03 +0100)
committerMarco Costalba <mcostalba@gmail.com>
Fri, 9 Oct 2009 02:55:10 +0000 (03:55 +0100)
Null moves can artificially create a repetition
draw where instead there is no one.

So use a second counter to reset history after
a null move.

Idea from Joona.

After 999 games at 1+0

Mod vs Orig +238 =553 -208 51.50%  514.5/999  +10 ELO

Signed-off-by: Marco Costalba <mcostalba@gmail.com>

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