Implement MaxGain table

Signed-off-by: Marco Costalba <mcostalba@gmail.com>

src/maxgain.h

@@ -0,0 +1,51 @@
+/*
+  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
+
+  Stockfish is free software: you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published by
+  the Free Software Foundation, either version 3 of the License, or
+  (at your option) any later version.
+
+  Stockfish is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  GNU General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+
+#if !defined(MAXGAIN_H_INCLUDED)
+#define MAXGAIN_H_INCLUDED
+
+////
+//// Includes
+////
+
+#include "move.h"
+#include "piece.h"
+#include "value.h"
+
+
+////
+//// Types
+////
+
+class MaxGain {
+
+public:
+  MaxGain();
+  void clear();
+  void store(Piece p, Square from, Square to, Value prev, Value curr);
+  Value retrieve(Piece p, Square from, Square to);
+
+private:
+  int maxStaticValueDelta[16][64][64];  // [piece][from_square][to_square]
+};
+
+
+#endif // !defined(MAXGAIN_H_INCLUDED)
+