Consolidate Square Flipping

[stockfish] / src / psqt.cpp

diff --git a/src/psqt.cpp b/src/psqt.cpp
index 8bad7ed427c5c2dd2f2de48ab9a5bf64b58d8b29..f6f5933cb250ab394e2030cdc6fb35954bc3ac45 100644 (file)
--- a/src/psqt.cpp
+++ b/src/psqt.cpp
@@ -114,7 +114,7 @@ void init() {
           File f = map_to_queenside(file_of(s));
           psq[ pc][ s] = score + (type_of(pc) == PAWN ? PBonus[rank_of(s)][file_of(s)]
                                                       : Bonus[pc][rank_of(s)][f]);
-          psq[~pc][~s] = -psq[pc][s];
+          psq[~pc][flip_rank(s)] = -psq[pc][s];
       }
   }
 }