Make kingRing always 8 squares

[stockfish] / src / bitboard.h

diff --git a/src/bitboard.h b/src/bitboard.h
index 6032f47f6294b385847716154fe145009dfb5604..3d629de1abe986d63cbf3801f7d1a421cb8006ed 100644 (file)
--- a/src/bitboard.h
+++ b/src/bitboard.h
@@ -165,8 +165,9 @@ constexpr Bitboard make_bitboard(Square s, Squares... squares) {
 template<Direction D>
 constexpr Bitboard shift(Bitboard b) {
   return  D == NORTH      ?  b             << 8 : D == SOUTH      ?  b             >> 8
 template<Direction D>
 constexpr Bitboard shift(Bitboard b) {
   return  D == NORTH      ?  b             << 8 : D == SOUTH      ?  b             >> 8

-        : D == NORTH_EAST ? (b & ~FileHBB) << 9 : D == SOUTH_EAST ? (b & ~FileHBB) >> 7
-        : D == NORTH_WEST ? (b & ~FileABB) << 7 : D == SOUTH_WEST ? (b & ~FileABB) >> 9
+        : D == EAST       ? (b & ~FileHBB) << 1 : D == WEST       ? (b & ~FileABB) >> 1
+        : D == NORTH_EAST ? (b & ~FileHBB) << 9 : D == NORTH_WEST ? (b & ~FileABB) << 7 
+        : D == SOUTH_EAST ? (b & ~FileHBB) >> 7 : D == SOUTH_WEST ? (b & ~FileABB) >> 9

         : 0;
 }
 
         : 0;
 }