X-Git-Url: https://git.sesse.net/?p=stockfish;a=blobdiff_plain;f=src%2Fpawns.cpp;h=3aede5adfa7f111b42ddef9332e9182a5dfba8f5;hp=c099153a2ca5d7e1038d15a6ca01e934fcdfa859;hb=f3728e66f856a8916a12eada7b18049034c864ca;hpb=e0a00c499654850108749ca6fd686f79188ac1f9

diff --git a/src/pawns.cpp b/src/pawns.cpp
index c099153a..3aede5ad 100644
--- a/src/pawns.cpp
+++ b/src/pawns.cpp
@@ -79,8 +79,6 @@ namespace {
 
 PawnInfo* PawnInfoTable::get_pawn_info(const Position& pos) const {
 
-  assert(pos.is_ok());
-
   Key key = pos.get_pawn_key();
   PawnInfo* pi = probe(key);
 
@@ -134,8 +132,8 @@ Score PawnInfoTable::evaluate_pawns(const Position& pos, Bitboard ourPawns,
   {
       assert(pos.piece_on(s) == make_piece(Us, PAWN));
 
-      f = square_file(s);
-      r = square_rank(s);
+      f = file_of(s);
+      r = rank_of(s);
 
       // This file cannot be half open
       pi->halfOpenFiles[Us] &= ~(1 << f);
@@ -184,7 +182,7 @@ Score PawnInfoTable::evaluate_pawns(const Position& pos, Bitboard ourPawns,
       // pawn on neighboring files is higher or equal than the number of
       // enemy pawns in the forward direction on the neighboring files.
       candidate =   !(opposed | passed | backward | isolated)
-                 && (b = attack_span_mask(Them, s + pawn_push(Us)) & ourPawns) != EmptyBoardBB
+                 && (b = attack_span_mask(Them, s + pawn_push(Us)) & ourPawns) != 0
                  &&  count_1s<Max15>(b) >= count_1s<Max15>(attack_span_mask(Us, s) & theirPawns);
 
       // Passed pawns will be properly scored in evaluation because we need
@@ -225,12 +223,12 @@ Score PawnInfo::updateShelter(const Position& pos, Square ksq) {
 
   if (relative_rank(Us, ksq) <= RANK_4)
   {
-      pawns = pos.pieces(PAWN, Us) & this_and_neighboring_files_bb(ksq);
+      pawns = pos.pieces(PAWN, Us) & this_and_neighboring_files_bb(file_of(ksq));
       r = ksq & (7 << 3);
       for (int i = 0; i < 3; i++)
       {
           r += Shift;
-          shelter += BitCount8Bit[(pawns >> r) & 0xFF] * (64 >> i);
+          shelter += BitCount8Bit[(pawns >> r) & 0xFF] << (6 - i);
       }
   }
   kingSquares[Us] = ksq;