Promotion piece must be empty if is not a promotion

[stockfish] / src / history.h

diff --git a/src/history.h b/src/history.h
index c265777b42a6c4d0bcf60485aae9d80a64625f43..4d84be7054858eb37407b097b87e5aa2320e7846 100644 (file)
--- a/src/history.h
+++ b/src/history.h
@@ -37,9 +37,9 @@ public:
   Value value(Piece p, Square to) const;
   void update(Piece p, Square to, Value bonus);
   Value gain(Piece p, Square to) const;
-  void update_gain(Piece p, Square to, Value gain);
+  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]
@@ -63,8 +63,8 @@ inline Value History::gain(Piece p, Square to) const {
   return maxGains[p][to];
 }
 
-inline void History::update_gain(Piece p, Square to, Value gain) {
-  maxGains[p][to] = Max(gain, maxGains[p][to] - 1);
+inline void History::update_gain(Piece p, Square to, Value g) {
+  maxGains[p][to] = Max(g, maxGains[p][to] - 1);
 }
 
 #endif // !defined(HISTORY_H_INCLUDED)