X-Git-Url: https://git.sesse.net/?p=stockfish;a=blobdiff_plain;f=src%2Fmovegen.cpp;h=5917c9e486a7a92e46af70298ba5e227b1f29aa4;hp=9c405defab4b75e9845e18ec809fc1310843669d;hb=1156eb865babe7b07443548aa5e81211205bc7b5;hpb=76381cbd6903f8be571cbc0d644a0f78026134bc

diff --git a/src/movegen.cpp b/src/movegen.cpp
index 9c405def..5917c9e4 100644
--- a/src/movegen.cpp
+++ b/src/movegen.cpp
@@ -945,11 +945,10 @@ namespace {
     File rookFile = (side == QUEEN_SIDE ? FILE_D : FILE_F);
     Color us = pos.side_to_move();
     Square ksq = pos.king_square(us);
-    Bitboard occ = pos.occupied_squares(), oppKingBB = EmptyBoardBB;
+    Bitboard occ = pos.occupied_squares();
 
-    set_bit(&oppKingBB, pos.king_square(opposite_color(us)));
     clear_bit(&occ, ksq); // Remove our king from the board
     Square rsq = make_square(rookFile, square_rank(ksq));
-    return (rook_attacks_bb(rsq, occ) & oppKingBB);
+    return bit_is_set(rook_attacks_bb(rsq, occ), pos.king_square(opposite_color(us)));
   }
 }