X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;ds=sidebyside;f=src%2Fmove.cpp;h=c45e1c2c7258c8863623e276ed37b1cde03c646a;hb=67686b7684e8cb2f195a648b1042e671e80bc9be;hp=247f8a2abe218a3af10339bb095e84ffe97ff60a;hpb=95d9687d95e5aa540c58e673300ef911164c90e0;p=stockfish

diff --git a/src/move.cpp b/src/move.cpp
index 247f8a2a..c45e1c2c 100644
--- a/src/move.cpp
+++ b/src/move.cpp
@@ -77,12 +77,17 @@ Move move_from_uci(const Position& pos, const string& str) {
 
 
 /// move_to_san() takes a position and a move as input, where it is assumed
-/// that the move is a legal move from the position. The return value is
+/// that the move is a legal move for the position. The return value is
 /// a string containing the move in short algebraic notation.
 
 const string move_to_san(Position& pos, Move m) {
 
-  assert(pos.is_ok());
+  if (m == MOVE_NONE)
+      return "(none)";
+
+  if (m == MOVE_NULL)
+      return "(null)";
+
   assert(move_is_ok(m));
 
   Bitboard attackers;
@@ -92,12 +97,6 @@ const string move_to_san(Position& pos, Move m) {
   PieceType pt = piece_type(pos.piece_on(from));
   string san;
 
-  if (m == MOVE_NONE)
-      return "(none)";
-
-  if (m == MOVE_NULL)
-      return "(null)";
-
   if (move_is_castle(m))
       san = (move_to(m) < move_from(m) ? "O-O-O" : "O-O");
   else