X-Git-Url: https://git.sesse.net/?p=stockfish;a=blobdiff_plain;f=src%2Fbitbase.cpp;h=402f3fbbc1d65f320ee72fcca36a4480be168775;hp=96ada8dd59d2ac95e6dd6ab2d7d8826db0022354;hb=007613cb5e665c19368ab0cc2ad8bc45e3c16ad4;hpb=c2c185423b13b0227c86009c6006e48e8d258896

diff --git a/src/bitbase.cpp b/src/bitbase.cpp
index 96ada8dd..402f3fbb 100644
--- a/src/bitbase.cpp
+++ b/src/bitbase.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) 2008-2010 Marco Costalba, Joona Kiiski, Tord Romstad
+  Copyright (C) 2008-2012 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
@@ -39,9 +39,9 @@ namespace {
     void from_index(int index);
     Result classify_white(const Result db[]);
     Result classify_black(const Result db[]);
-    Bitboard wk_attacks()   const { return StepAttacksBB[WK][whiteKingSquare]; }
-    Bitboard bk_attacks()   const { return StepAttacksBB[BK][blackKingSquare]; }
-    Bitboard pawn_attacks() const { return StepAttacksBB[WP][pawnSquare]; }
+    Bitboard wk_attacks()   const { return StepAttacksBB[W_KING][whiteKingSquare]; }
+    Bitboard bk_attacks()   const { return StepAttacksBB[B_KING][blackKingSquare]; }
+    Bitboard pawn_attacks() const { return StepAttacksBB[W_PAWN][pawnSquare]; }
 
     Square whiteKingSquare, blackKingSquare, pawnSquare;
     Color sideToMove;
@@ -151,7 +151,7 @@ namespace {
     //
     // Case 1: Stalemate
     if (   sideToMove == BLACK
-        && (bk_attacks() & ~(wk_attacks() | pawn_attacks())) == EmptyBoardBB)
+        && !(bk_attacks() & ~(wk_attacks() | pawn_attacks())))
         return RESULT_DRAW;
 
     // Case 2: King can capture pawn