X-Git-Url: https://git.sesse.net/?p=stockfish;a=blobdiff_plain;f=src%2Fevaluate.cpp;h=e861f5f032e95d80f54bb4137447e617686b338b;hp=6990a71d2bbb306d945cfedebc94c659e1497475;hb=293c44bc09587259818a82e1d2afb511e552badd;hpb=c2902112e51b50c8ebcf263825597f437fdf56e7

diff --git a/src/evaluate.cpp b/src/evaluate.cpp
index 6990a71d..e861f5f0 100644
--- a/src/evaluate.cpp
+++ b/src/evaluate.cpp
@@ -156,12 +156,12 @@ namespace {
   const Score Tempo = make_score(24, 11);
 
   // Rooks and queens on the 7th rank
-  const Score RookOn7thBonus  = make_score(3, 20);
-  const Score QueenOn7thBonus = make_score(1,  8);
+  const Score RookOn7thBonus  = make_score(11, 20);
+  const Score QueenOn7thBonus = make_score( 3,  8);
 
   // Rooks and queens attacking pawns on the same rank
-  const Score RookOnPawnBonus  = make_score(3, 48);
-  const Score QueenOnPawnBonus = make_score(1, 40);
+  const Score RookOnPawnBonus  = make_score(10, 28);
+  const Score QueenOnPawnBonus = make_score( 4, 20);
 
   // Rooks on open files (modified by Joona Kiiski)
   const Score RookOpenFileBonus     = make_score(43, 21);
@@ -171,6 +171,9 @@ namespace {
   // right to castle.
   const Value TrappedRookPenalty = Value(180);
 
+  // Penalty for bishop with pawns on the same coloured squares
+  const Score BishopPawnsPenalty = make_score(8, 12);
+
   // Penalty for a bishop on a1/h1 (a8/h8 for black) which is trapped by
   // a friendly pawn on b2/g2 (b7/g7 for black). This can obviously only
   // happen in Chess960 games.
@@ -582,6 +585,10 @@ Value do_evaluate(const Position& pos, Value& margin) {
                  && !more_than_one(BetweenBB[s][pos.king_square(Them)] & pos.pieces()))
                  score += BishopPinBonus;
 
+        // Penalty for bishop with same coloured pawns
+        if (Piece == BISHOP)
+            score -= BishopPawnsPenalty * ei.pi->pawns_on_same_color_squares(Us, s);
+
         // Bishop and knight outposts squares
         if (    (Piece == BISHOP || Piece == KNIGHT)
             && !(pos.pieces(Them, PAWN) & attack_span_mask(Us, s)))