Fix brekage from previous patches

[stockfish] / src / position.cpp

diff --git a/src/position.cpp b/src/position.cpp
index 59caa88e47e4b0bcc8220b4c9d8617b23f799946..59c3a8c39f882f1bcb347f6dfeda5a78acfc7c10 100644 (file)
--- a/src/position.cpp
+++ b/src/position.cpp
@@ -603,9 +603,10 @@ bool Position::pl_move_is_legal(Move m, Bitboard pinned) const {
   assert(piece_on(king_square(us)) == make_piece(us, KING));
 
   // If the moving piece is a king, check whether the destination
-  // square is attacked by the opponent.
+  // square is attacked by the opponent. Castling moves are checked
+  // for legality during move generation.
   if (type_of_piece_on(from) == KING)
-      return !(attackers_to(move_to(m)) & pieces_of_color(opposite_color(us)));
+      return move_is_castle(m) || !(attackers_to(move_to(m)) & pieces_of_color(opposite_color(us)));
 
   // A non-king move is legal if and only if it is not pinned or it
   // is moving along the ray towards or away from the king.