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Change evaluation GrainSize from 4 to 8

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Idea from Joona.

After 999 games at 1+0 on my Intel Core 2 Duo
Orig - Mod: +215 =538 -226 (+11 ELO)

On Joona QUAD after 845 games at 1+0
Orig - Mod: 151 - 181 - 513 (+13 elo)

So it seems a good change !

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
This commit is contained in:
Marco Costalba 2009-09-20 20:13:24 +01:00
parent 9741694fca
commit a7cb05b1eb
1 changed files with 1 additions and 1 deletions
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src/evaluate.cpp
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@ -43,7 +43,7 @@ namespace {
const int Sign[2] = { 1, -1 };
// Evaluation grain size, must be a power of 2
const int GrainSize = 4;
const int GrainSize = 8;
// Evaluation weights, initialized from UCI options
int WeightMobilityMidgame, WeightMobilityEndgame;