Revert "Count passed pawns in asymmetry measure"

[stockfish] / src / pawns.cpp

diff --git a/src/pawns.cpp b/src/pawns.cpp
index b4ff799da3e71731a13ebd718f49c680a631f7cf..a1b533258b30f6e4b1b0264c24f896facdbc65ec 100644 (file)
--- a/src/pawns.cpp
+++ b/src/pawns.cpp
@@ -88,10 +88,8 @@ namespace {
   template<Color Us>
   Score evaluate(const Position& pos, Pawns::Entry* e) {
 
-    const Color     Them  = (Us == WHITE ? BLACK      : WHITE);
-    const Direction Up    = (Us == WHITE ? NORTH      : SOUTH);
-    const Direction Right = (Us == WHITE ? NORTH_EAST : SOUTH_WEST);
-    const Direction Left  = (Us == WHITE ? NORTH_WEST : SOUTH_EAST);
+    const Color     Them = (Us == WHITE ? BLACK : WHITE);
+    const Direction Up   = (Us == WHITE ? NORTH : SOUTH);
 
     Bitboard b, neighbours, stoppers, doubled, supported, phalanx;
     Bitboard lever, leverPush;
@@ -106,7 +104,7 @@ namespace {
     e->passedPawns[Us] = e->pawnAttacksSpan[Us] = e->weakUnopposed[Us] = 0;
     e->semiopenFiles[Us] = 0xFF;
     e->kingSquares[Us]   = SQ_NONE;
-    e->pawnAttacks[Us]   = shift<Right>(ourPawns) | shift<Left>(ourPawns);
+    e->pawnAttacks[Us]   = pawn_attacks_bb<Us>(ourPawns);
     e->pawnsOnSquares[Us][BLACK] = popcount(ourPawns & DarkSquares);
     e->pawnsOnSquares[Us][WHITE] = pos.count<PAWN>(Us) - e->pawnsOnSquares[Us][BLACK];