X-Git-Url: https://git.sesse.net/?p=stockfish;a=blobdiff_plain;f=src%2Fpawns.cpp;h=16dbf27a5b105c3f8364d197b3913ac5f337ddfd;hp=fde70ba5306b6b47bec6d01f597c19fac0ada86c;hb=d706ae62d73d90c0f80cdccd58384a347295d549;hpb=7fc47eeb6f6b5f3c5ff697e974093ff14413e42c

diff --git a/src/pawns.cpp b/src/pawns.cpp
index fde70ba5..16dbf27a 100644
--- a/src/pawns.cpp
+++ b/src/pawns.cpp
@@ -66,6 +66,7 @@ namespace {
     { V(-17), V( -13), V( 100), V(  4), V(  9), V(-16), V(-31) }
   };
 
+
   // KingOnFile[semi-open Us][semi-open Them] contains bonuses/penalties
   // for king when the king is on a semi-open or open file.
   constexpr Score KingOnFile[2][2] = {{ S(-19,12), S(-6, 7)  },
@@ -91,7 +92,7 @@ namespace {
     Square s;
     bool backward, passed, doubled;
     Score score = SCORE_ZERO;
-    const Square* pl = pos.squares<PAWN>(Us);
+    Bitboard b = pos.pieces(Us, PAWN);
 
     Bitboard ourPawns   = pos.pieces(  Us, PAWN);
     Bitboard theirPawns = pos.pieces(Them, PAWN);
@@ -104,8 +105,9 @@ namespace {
     e->blockedCount += popcount(shift<Up>(ourPawns) & (theirPawns | doubleAttackThem));
 
     // Loop through all pawns of the current color and score each pawn
-    while ((s = *pl++) != SQ_NONE)
-    {
+    while (b) {
+        s = pop_lsb(&b);
+
         assert(pos.piece_on(s) == make_piece(Us, PAWN));
 
         Rank r = relative_rank(Us, s);
@@ -176,8 +178,8 @@ namespace {
             score -=  Doubled * doubled
                     + WeakLever * more_than_one(lever);
 
-        if (blocked && r > RANK_4)
-            score += BlockedPawn[r-4];
+        if (blocked && r >= RANK_5)
+            score += BlockedPawn[r - RANK_5];
     }
 
     return score;