Introduce scale factor in pawn evaluation

[stockfish] / src / material.cpp

diff --git a/src/material.cpp b/src/material.cpp
index 732aded7b3285b9bdd931669fc8d4a569ce5f240..f0ee5f682d02cada44957745849684613f3e4196 100644 (file)
--- a/src/material.cpp
+++ b/src/material.cpp
@@ -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
@@ -304,7 +304,7 @@ MaterialInfo* MaterialInfoTable::get_material_info(const Position& pos) {
     {
         if (   pos.non_pawn_material(c) == pos.non_pawn_material(opposite_color(c))
             || pos.non_pawn_material(c) < RookValueMidgame)
-            mi->factor[c] = 0;
+            mi->factor[c] = SCALE_FACTOR_ZERO;
         else
         {
             switch (pos.piece_count(c, BISHOP)) {