X-Git-Url: https://git.sesse.net/?p=stockfish;a=blobdiff_plain;f=src%2Fevaluate.cpp;h=b531cc27d26489fc64a97890d571b1dd254c0a83;hp=6042ae3312e1690f3a2b26a72895532ef1ddb455;hb=820c5c25b649d6bdd51bed14a16efdc11719b588;hpb=6c898a10be75bc2c295a7dca7f72e51e76ec8293

diff --git a/src/evaluate.cpp b/src/evaluate.cpp
index 6042ae33..b531cc27 100644
--- a/src/evaluate.cpp
+++ b/src/evaluate.cpp
@@ -512,8 +512,6 @@ namespace {
 
     const Color     Them     = (Us == WHITE ? BLACK      : WHITE);
     const Direction Up       = (Us == WHITE ? NORTH      : SOUTH);
-    const Direction Left     = (Us == WHITE ? NORTH_WEST : SOUTH_EAST);
-    const Direction Right    = (Us == WHITE ? NORTH_EAST : SOUTH_WEST);
     const Bitboard  TRank3BB = (Us == WHITE ? Rank3BB    : Rank6BB);
 
     Bitboard b, weak, defended, nonPawnEnemies, stronglyProtected, safeThreats;
@@ -529,7 +527,7 @@ namespace {
         b =  pos.pieces(Us, PAWN)
            & (~attackedBy[Them][ALL_PIECES] | attackedBy[Us][ALL_PIECES]);
 
-        safeThreats = (shift<Right>(b) | shift<Left>(b)) & weak;
+        safeThreats = pos.pawn_attacks<Us>(b) & weak;
         score += ThreatBySafePawn * popcount(safeThreats);
     }
 
@@ -585,7 +583,7 @@ namespace {
         & (attackedBy[Us][ALL_PIECES] | ~attackedBy[Them][ALL_PIECES]);
 
     // Bonus for safe pawn threats on the next move
-    b =  (shift<Left>(b) | shift<Right>(b))
+    b =   pos.pawn_attacks<Us>(b)
        &  pos.pieces(Them)
        & ~attackedBy[Us][PAWN];