Fix zugzwang pruning issues

[stockfish] / src / endgame.cpp

diff --git a/src/endgame.cpp b/src/endgame.cpp
index 618113904afe096c87ee3c56378b7fd0ac330628..d38247805b50fe87ec6df57cf3cd34b7982e61af 100644 (file)
--- a/src/endgame.cpp
+++ b/src/endgame.cpp
@@ -2,7 +2,7 @@
   Stockfish, a UCI chess playing engine derived from Glaurung 2.1
   Copyright (C) 2004-2008 Tord Romstad (Glaurung author)
   Copyright (C) 2008-2015 Marco Costalba, Joona Kiiski, Tord Romstad
-  Copyright (C) 2015-2016 Marco Costalba, Joona Kiiski, Gary Linscott, Tord Romstad
+  Copyright (C) 2015-2017 Marco Costalba, Joona Kiiski, Gary Linscott, 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
@@ -652,17 +652,15 @@ ScaleFactor Endgame<KBPKB>::operator()(const Position& pos) const {
 
       if (relative_rank(strongSide, pawnSq) <= RANK_5)
           return SCALE_FACTOR_DRAW;
-      else
-      {
-          Bitboard path = forward_bb(strongSide, pawnSq);
+      
+      Bitboard path = forward_bb(strongSide, pawnSq);
 
-          if (path & pos.pieces(weakSide, KING))
-              return SCALE_FACTOR_DRAW;
+      if (path & pos.pieces(weakSide, KING))
+          return SCALE_FACTOR_DRAW;
 
-          if (  (pos.attacks_from<BISHOP>(weakBishopSq) & path)
-              && distance(weakBishopSq, pawnSq) >= 3)
-              return SCALE_FACTOR_DRAW;
-      }
+      if (  (pos.attacks_from<BISHOP>(weakBishopSq) & path)
+          && distance(weakBishopSq, pawnSq) >= 3)
+          return SCALE_FACTOR_DRAW;
   }
   return SCALE_FACTOR_NONE;
 }