Set IncrementalFutilityMargin to 8

After 999 games we are almost equal (+2 ELO),
but we have a good result against Rybka

Rybka 2.3.2a mp 32-bit vs Mod  254.5 - 242.5 +152/-140/=205 51.21%
Rybka 2.3.2a mp 32-bit vs Orig 259.5 - 236.5 +151/-128/=217 52.32%

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

diff --git a/src/search.cpp b/src/search.cpp
index dac9493351cd183d6c3340ff92079c6357880845..96a945e666ed66b8d54acca97791cd37f1d665c5 100644 (file)
--- a/src/search.cpp
+++ b/src/search.cpp
@@ -180,7 +180,7 @@ namespace {
   const Value FutilityMarginQS = Value(0x80);
 
   // Each move futility margin is decreased
   const Value FutilityMarginQS = Value(0x80);
 
   // Each move futility margin is decreased

-  const Value IncrementalFutilityMargin = Value(0x4);
+  const Value IncrementalFutilityMargin = Value(0x8);

 
   // Razoring
   const Depth RazorDepth = 4*OnePly;
 
   // Razoring
   const Depth RazorDepth = 4*OnePly;