X-Git-Url: https://git.sesse.net/?p=stockfish;a=blobdiff_plain;f=src%2Fhistory.h;h=2665f24fc34628d986edc57effe612ee8c7b06fc;hp=5c394cc8f17e2ed75f043ba01b0251e607127222;hb=1322ab97c737fe761bd6ae8786f852851b8f019f;hpb=c12364bb67741daff123c50770b1fd6923fa9530

diff --git a/src/history.h b/src/history.h
index 5c394cc8..2665f24f 100644
--- a/src/history.h
+++ b/src/history.h
@@ -1,7 +1,7 @@
 /*
   Stockfish, a UCI chess playing engine derived from Glaurung 2.1
   Copyright (C) 2004-2008 Tord Romstad (Glaurung author)
-  Copyright (C) 2008-2009 Marco Costalba
+  Copyright (C) 2008-2010 Marco Costalba, Joona Kiiski, Tord Romstad
 
   Stockfish is free software: you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
@@ -28,6 +28,7 @@
 #include "depth.h"
 #include "move.h"
 #include "piece.h"
+#include "value.h"
 
 
 ////
@@ -48,10 +49,13 @@ public:
   void clear();
   void success(Piece p, Square to, Depth d);
   void failure(Piece p, Square to, Depth d);
-  int move_ordering_score(Piece p, Square to) const;
+  int value(Piece p, Square to) const;
+  void set_gain(Piece p, Square to, Value delta);
+  Value gain(Piece p, Square to) const;
 
 private:
   int history[16][64];  // [piece][square]
+  int maxStaticValueDelta[16][64];  // [piece][from_square][to_square]
 };
 
 
@@ -61,13 +65,25 @@ private:
 
 /// HistoryMax controls how often the history counters will be scaled down:
 /// When the history score for a move gets bigger than HistoryMax, all
-/// entries in the table are divided by 4. It is difficult to guess what
+/// entries in the table are divided by 2. It is difficult to guess what
 /// the ideal value of this constant is. Scaling down the scores often has
 /// the effect that parts of the search tree which have been searched
 /// recently have a bigger importance for move ordering than the moves which
 /// have been searched a long time ago.
 
-const int HistoryMax = 25000 * OnePly;
+const int HistoryMax = 50000 * OnePly;
 
 
+////
+//// Inline functions
+////
+
+inline int History::value(Piece p, Square to) const {
+  return history[p][to];
+}
+
+inline Value History::gain(Piece p, Square to) const {
+  return Value(maxStaticValueDelta[p][to]);
+}
+
 #endif // !defined(HISTORY_H_INCLUDED)