X-Git-Url: https://git.sesse.net/?p=stockfish;a=blobdiff_plain;f=src%2Fmovegen.cpp;h=df2b9b87b1b2cd96adb42986b0e14e3be40c81dd;hp=4b36360c56ae7a13c67178e14d495b320897b531;hb=605b3aedd5b2cc530db417fc8bb57cc45200cca1;hpb=7a68916ff992115d8013e7ce31850aec558d8ac5

diff --git a/src/movegen.cpp b/src/movegen.cpp
index 4b36360c..df2b9b87 100644
--- a/src/movegen.cpp
+++ b/src/movegen.cpp
@@ -1,7 +1,7 @@
 /*
   Stockfish, a UCI chess playing engine derived from Glaurung 2.1
   Copyright (C) 2004-2008 Tord Romstad (Glaurung author)
-  Copyright (C) 2008-2009 Marco Costalba
+  Copyright (C) 2008-2010 Marco Costalba, Joona Kiiski, Tord Romstad
 
   Stockfish is free software: you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
@@ -338,6 +338,10 @@ bool move_is_legal(const Position& pos, const Move m, Bitboard pinned) {
            ||(square_rank(to) == RANK_1 && us != WHITE)) != bool(move_is_promotion(m)))
           return false;
 
+      // The promotion piece, if any, must be valid
+      if (move_promotion_piece(m) > QUEEN || move_promotion_piece(m) == PAWN)
+          return false;
+
       // Proceed according to the square delta between the origin and
       // destination squares.
       switch (direction)