X-Git-Url: https://git.sesse.net/?p=stockfish;a=blobdiff_plain;f=src%2Ftypes.h;fp=src%2Ftypes.h;h=6af0368720313d4c8cb7260566a92726f5256daa;hp=c77d804037ee7a094b54843b1482801baa2c6aed;hb=7756344d5d2b93970e7cd423f8cbf6fb1da11b74;hpb=770c8d92f3886d11ae88afef13f6552f9132a714

diff --git a/src/types.h b/src/types.h
index c77d8040..6af03687 100644
--- a/src/types.h
+++ b/src/types.h
@@ -366,6 +366,10 @@ constexpr Piece operator~(Piece pc) {
   return Piece(pc ^ 8); // Swap color of piece B_KNIGHT -> W_KNIGHT
 }
 
+inline File map_to_queenside(File f) {
+  return std::min(f, File(FILE_H - f)); // Map files ABCDEFGH to files ABCDDCBA
+}
+
 constexpr CastlingRights operator&(Color c, CastlingRights cr) {
   return CastlingRights((c == WHITE ? WHITE_CASTLING : BLACK_CASTLING) & cr);
 }