Document asymmetric SEE pruning trick

[stockfish] / src / position.h

diff --git a/src/position.h b/src/position.h
index fb7eb4b90cc79335ade326bcbeae0d59825c1fe6..0951b4669cd28ee61d32771a602d68a484d95de4 100644 (file)
--- a/src/position.h
+++ b/src/position.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) 2008-2012 Marco Costalba, Joona Kiiski, Tord Romstad
+  Copyright (C) 2008-2013 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
@@ -160,6 +160,7 @@ public:
   // Static exchange evaluation
   int see(Move m) const;
   int see_sign(Move m) const;
+  int see_asymm(Move m, int asymmThreshold) const;
 
   // Accessing hash keys
   Key key() const;
@@ -193,6 +194,7 @@ private:
 
   // Helper functions
   void do_castle(Square kfrom, Square kto, Square rfrom, Square rto);
+  template<bool Asymmetric> int do_see(Move m, int asymmThreshold) const;
   template<bool FindPinned> Bitboard hidden_checkers() const;
 
   // Computing hash keys from scratch (for initialization and debugging)