From bb7713c8e92c9373f0294a4317101cccda0e17e5 Mon Sep 17 00:00:00 2001 From: Marco Costalba Date: Thu, 28 Apr 2011 08:00:10 +0100 Subject: [PATCH] Limit history range to +-2000 Extensive test series on tweaking history limit and bonus formula. At the end this was the best. After 11959 games: Mod vs Orig 2087 - 1934 - 7938 ELO +4 (+- 3.7) LOS 92% Signed-off-by: Marco Costalba --- src/history.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/src/history.h b/src/history.h index 0f3fbc10..4d84be70 100644 --- a/src/history.h +++ b/src/history.h @@ -39,7 +39,7 @@ public: Value gain(Piece p, Square to) const; void update_gain(Piece p, Square to, Value g); - static const Value MaxValue = Value(1 << 29); // To avoid an overflow + static const Value MaxValue = Value(2000); private: Value history[16][64]; // [piece][to_square] -- 2.39.2