X-Git-Url: https://git.sesse.net/?p=stockfish;a=blobdiff_plain;f=src%2Fpawns.cpp;h=b8f82cff4a6718eae4813201191009330e9c30c9;hp=17a96670911dc414b351ca7f2197dada32a510a7;hb=6d24ef8585c2ed5618eb9b4ab1d8ee35a05ce2cd;hpb=e06a117d5e78ec4edc051f2b161d36559f784d37

diff --git a/src/pawns.cpp b/src/pawns.cpp
index 17a96670..b8f82cff 100644
--- a/src/pawns.cpp
+++ b/src/pawns.cpp
@@ -105,7 +105,7 @@ namespace {
     Score score = SCORE_ZERO;
     const Square* pl = pos.squares<PAWN>(Us);
 
-    Bitboard ourPawns   = pos.pieces(Us  , PAWN);
+    Bitboard ourPawns   = pos.pieces(  Us, PAWN);
     Bitboard theirPawns = pos.pieces(Them, PAWN);
 
     e->passedPawns[Us]   = e->pawnAttacksSpan[Us] = 0;
@@ -126,7 +126,7 @@ namespace {
         e->pawnAttacksSpan[Us] |= pawn_attack_span(Us, s);
 
         // Flag the pawn
-        opposed    = theirPawns & forward_bb(Us, s);
+        opposed    = theirPawns & forward_file_bb(Us, s);
         stoppers   = theirPawns & passed_pawn_mask(Us, s);
         lever      = theirPawns & PawnAttacks[Us][s];
         leverPush  = theirPawns & PawnAttacks[Us][s + Up];
@@ -158,11 +158,20 @@ namespace {
         // which could become passed after one or two pawn pushes when are
         // not attacked more times than defended.
         if (   !(stoppers ^ lever ^ leverPush)
-            && !(ourPawns & forward_bb(Us, s))
+            && !(ourPawns & forward_file_bb(Us, s))
             && popcount(supported) >= popcount(lever)
             && popcount(phalanx)   >= popcount(leverPush))
             e->passedPawns[Us] |= s;
 
+        else if (   stoppers == SquareBB[s + Up]
+                 && relative_rank(Us, s) >= RANK_5)
+        {
+            b = shift<Up>(supported) & ~theirPawns;
+            while (b)
+                if (!more_than_one(theirPawns & PawnAttacks[Us][pop_lsb(&b)]))
+                    e->passedPawns[Us] |= s;
+        }
+
         // Score this pawn
         if (!neighbours)
             score -= Isolated[opposed];
@@ -177,7 +186,7 @@ namespace {
             score += Connected[opposed][!!phalanx][more_than_one(supported)][relative_rank(Us, s)];
 
         if (doubled && !supported)
-           score -= Doubled;
+            score -= Doubled;
 
         if (lever)
             score += Lever[relative_rank(Us, s)];
@@ -241,7 +250,7 @@ Value Entry::shelter_storm(const Position& pos, Square ksq) {
 
   enum { BlockedByKing, Unopposed, BlockedByPawn, Unblocked };
 
-  Bitboard b = pos.pieces(PAWN) & (in_front_bb(Us, rank_of(ksq)) | rank_bb(ksq));
+  Bitboard b = pos.pieces(PAWN) & (forward_ranks_bb(Us, ksq) | rank_bb(ksq));
   Bitboard ourPawns = b & pos.pieces(Us);
   Bitboard theirPawns = b & pos.pieces(Them);
   Value safety = MaxSafetyBonus;
@@ -252,7 +261,7 @@ Value Entry::shelter_storm(const Position& pos, Square ksq) {
       b = ourPawns & file_bb(f);
       Rank rkUs = b ? relative_rank(Us, backmost_sq(Us, b)) : RANK_1;
 
-      b  = theirPawns & file_bb(f);
+      b = theirPawns & file_bb(f);
       Rank rkThem = b ? relative_rank(Us, frontmost_sq(Them, b)) : RANK_1;
 
       int d = std::min(f, FILE_H - f);