From bc35f4c42d367ef080d54ae381d13ed35b4fbecf Mon Sep 17 00:00:00 2001 From: Marco Costalba Date: Sun, 22 Nov 2009 11:11:36 +0100 Subject: [PATCH] Tone down a bit futility parameters After 999 games at 1+0 Mod vs Orig +239 =542 -218 +7 ELO Signed-off-by: Marco Costalba --- src/search.cpp | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/src/search.cpp b/src/search.cpp index faac36ce..94eb5af9 100644 --- a/src/search.cpp +++ b/src/search.cpp @@ -177,7 +177,7 @@ namespace { const Value FutilityMarginQS = Value(0x80); // Each move futility margin is decreased - const Value IncrementalFutilityMargin = Value(0xA); + const Value IncrementalFutilityMargin = Value(0x8); // Remaining depth: 1 ply 1.5 ply 2 ply 2.5 ply 3 ply 3.5 ply const Value FutilityMargins[12] = { Value(0x100), Value(0x120), Value(0x200), Value(0x220), Value(0x250), Value(0x270), @@ -1473,7 +1473,7 @@ namespace { { if (futilityValue == VALUE_NONE) futilityValue = evaluate(pos, ei, threadID) - + 64*(1+bitScanReverse32(int(depth) * int(depth))); + + 64*(2+bitScanReverse32(int(depth) * int(depth))); futilityValueScaled = futilityValue - moveCount * IncrementalFutilityMargin; -- 2.39.2