X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=src%2Fmove.cpp;h=a60506fd7c88cebb04ff323f2a92416f7434d698;hb=a492a9dd079d95faf136a744ff6d47a3d109ad68;hp=e52a8e59e688853fad3557314e5850da63b62d71;hpb=2a21543c88f82a64ee48d00d706db102c0c4637d;p=stockfish

diff --git a/src/move.cpp b/src/move.cpp
index e52a8e59..a60506fd 100644
--- a/src/move.cpp
+++ b/src/move.cpp
@@ -98,7 +98,7 @@ const string move_to_san(Position& pos, Move m) {
           // Disambiguation if we have more then one piece with destination 'to'
           // note that for pawns is not needed because starting file is explicit.
           attackers = pos.attackers_to(to) & pos.pieces(pt, pos.side_to_move());
-          clear_bit(&attackers, from);
+          attackers ^= from;
           ambiguousMove = ambiguousFile = ambiguousRank = false;
 
           while (attackers)