X-Git-Url: https://git.sesse.net/?p=stockfish;a=blobdiff_plain;f=src%2Fendgame.cpp;h=e0efd0e665271b75f2fc6bab5b824b97f843de89;hp=bb756f3b20cd558922c4fc6c416b055e962c3b6d;hb=15153a1de71d2d36c1f95eecfcf036fb76565309;hpb=469e7c5143af0785d6ba41cdef731ac1f403141c

diff --git a/src/endgame.cpp b/src/endgame.cpp
index bb756f3b..e0efd0e6 100644
--- a/src/endgame.cpp
+++ b/src/endgame.cpp
@@ -699,11 +699,12 @@ ScaleFactor ScalingFunction<KBPKB>::apply(const Position& pos) const {
           return SCALE_FACTOR_ZERO;
       else
       {
-          Bitboard ray = ray_bb(pawnSq, (strongerSide == WHITE)? SIGNED_DIR_N : SIGNED_DIR_S);
-          if (ray & pos.pieces(KING, weakerSide))
+          Bitboard path = squares_in_front_of(strongerSide, pawnSq);
+
+          if (path & pos.pieces(KING, weakerSide))
               return SCALE_FACTOR_ZERO;
 
-          if (  (pos.attacks_from<BISHOP>(weakerBishopSq) & ray)
+          if (  (pos.attacks_from<BISHOP>(weakerBishopSq) & path)
               && square_distance(weakerBishopSq, pawnSq) >= 3)
               return SCALE_FACTOR_ZERO;
       }