Remove supporting pawns

[stockfish] / src / evaluate.cpp

diff --git a/src/evaluate.cpp b/src/evaluate.cpp
index 1d52d30cd9ccdb8f746d11eb10d89ebc26ed3dc4..6ec42e24e9a0c602e50b2838857bc49449106060 100644 (file)
--- a/src/evaluate.cpp
+++ b/src/evaluate.cpp
@@ -583,7 +583,7 @@ namespace {
 
     const Color Them = (Us == WHITE ? BLACK : WHITE);
 
 
     const Color Them = (Us == WHITE ? BLACK : WHITE);
 

-    Bitboard b, squaresToQueen, defendedSquares, unsafeSquares, supportingPawns;
+    Bitboard b, squaresToQueen, defendedSquares, unsafeSquares;

     Score score = SCORE_ZERO;
 
     b = ei.pi->passed_pawns(Us);
     Score score = SCORE_ZERO;
 
     b = ei.pi->passed_pawns(Us);


@@ -651,15 +651,6 @@ namespace {
             }
         } // rr != 0
 
             }
         } // rr != 0
 

-        // Increase the bonus if the passed pawn is supported by a friendly pawn
-        // on the same rank and a bit smaller if it's on the previous rank.
-        supportingPawns = pos.pieces(Us, PAWN) & adjacent_files_bb(file_of(s));
-        if (supportingPawns & rank_bb(s))
-            ebonus += Value(r * 20);
-
-        else if (supportingPawns & rank_bb(s - pawn_push(Us)))
-            ebonus += Value(r * 12);
-

         // Rook pawns are a special case: They are sometimes worse, and
         // sometimes better than other passed pawns. It is difficult to find
         // good rules for determining whether they are good or bad. For now,
         // Rook pawns are a special case: They are sometimes worse, and
         // sometimes better than other passed pawns. It is difficult to find
         // good rules for determining whether they are good or bad. For now,