X-Git-Url: https://git.sesse.net/?p=stockfish;a=blobdiff_plain;f=src%2Fmovegen.cpp;h=86ab7ac4d1e007067ae21865b50dd4ba4c461264;hp=0301e90648c8314ab6db53b3e9a47bfbfefa2215;hb=fc3ea7365ad95ec1da05ac559e4e659cf8a7f0f9;hpb=55376219b7cd17c1dc5d8361e969f30e5421e87e

diff --git a/src/movegen.cpp b/src/movegen.cpp
index 0301e906..86ab7ac4 100644
--- a/src/movegen.cpp
+++ b/src/movegen.cpp
@@ -63,7 +63,7 @@ namespace {
     // when moving the castling rook we do not discover some hidden checker.
     // For instance an enemy queen in SQ_A1 when castling rook is in SQ_B1.
     if (    pos.is_chess960()
-        && (pos.attackers_to(kto, pos.occupied_squares() ^ rfrom) & enemies))
+        && (pos.attackers_to(kto, pos.pieces() ^ rfrom) & enemies))
             return mlist;
 
     (*mlist++).move = make_castle(kfrom, rfrom);
@@ -142,7 +142,7 @@ namespace {
     // Single and double pawn pushes, no promotions
     if (Type != MV_CAPTURE)
     {
-        emptySquares = (Type == MV_QUIET ? target : ~pos.occupied_squares());
+        emptySquares = (Type == MV_QUIET ? target : ~pos.pieces());
 
         b1 = move_pawns<UP>(pawnsNotOn7)   & emptySquares;
         b2 = move_pawns<UP>(b1 & TRank3BB) & emptySquares;
@@ -180,7 +180,7 @@ namespace {
     if (pawnsOn7 && (Type != MV_EVASION || (target & TRank8BB)))
     {
         if (Type == MV_CAPTURE)
-            emptySquares = ~pos.occupied_squares();
+            emptySquares = ~pos.pieces();
 
         if (Type == MV_EVASION)
             emptySquares &= target;
@@ -233,7 +233,7 @@ namespace {
 
     if (*pl != SQ_NONE)
     {
-        target = ci.checkSq[Pt] & ~pos.occupied_squares(); // Non capture checks only
+        target = ci.checkSq[Pt] & ~pos.pieces(); // Non capture checks only
 
         do {
             from = *pl;
@@ -308,10 +308,10 @@ MoveStack* generate(const Position& pos, MoveStack* mlist) {
       target = pos.pieces(~us);
 
   else if (Type == MV_QUIET)
-      target = ~pos.occupied_squares();
+      target = ~pos.pieces();
 
   else if (Type == MV_NON_EVASION)
-      target = pos.pieces(~us) | ~pos.occupied_squares();
+      target = ~pos.pieces(us);
 
   mlist = (us == WHITE ? generate_pawn_moves<WHITE, Type>(pos, mlist, target)
                        : generate_pawn_moves<BLACK, Type>(pos, mlist, target));
@@ -356,7 +356,7 @@ MoveStack* generate<MV_QUIET_CHECK>(const Position& pos, MoveStack* mlist) {
      if (pt == PAWN)
          continue; // Will be generated togheter with direct checks
 
-     Bitboard b = pos.attacks_from(Piece(pt), from) & ~pos.occupied_squares();
+     Bitboard b = pos.attacks_from(Piece(pt), from) & ~pos.pieces();
 
      if (pt == KING)
          b &= ~PseudoAttacks[QUEEN][ci.ksq];