From 3f704b0d19a6b348a682e8bd060be7f8d0f261f3 Mon Sep 17 00:00:00 2001
From: Fabian Fichter <ianfab@users.noreply.github.com>
Date: Wed, 22 Apr 2020 09:03:44 +0200
Subject: [PATCH] Fix butterfly history array size

Closes #110.
---
 src/movepick.h |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/src/movepick.h b/src/movepick.h
index 334a62d..b4b71fd 100644
--- a/src/movepick.h
+++ b/src/movepick.h
@@ -86,7 +86,7 @@ enum StatsType { NoCaptures, Captures };
 /// unsuccessful during the current search, and is used for reduction and move
 /// ordering decisions. It uses 2 tables (one for each color) indexed by
 /// the move's from and to squares, see www.chessprogramming.org/Butterfly_Boards
-typedef Stats<int16_t, 10692, COLOR_NB, int(SQUARE_NB + 1) * int(SQUARE_NB)> ButterflyHistory;
+typedef Stats<int16_t, 10692, COLOR_NB, int(SQUARE_NB + 1) * int(1 << SQUARE_BITS)> ButterflyHistory;
 
 /// CounterMoveHistory stores counter moves indexed by [piece][to] of the previous
 /// move, see www.chessprogramming.org/Countermove_Heuristic
-- 
1.7.0.4