Originally posted by omulcusobolani
It is illegal but if you're opponent dosen't notice it you can get away with it, I belive korcnoj casteled after moving his king and the game continued because no one noticed.
Wow!! not to notice a second castle in an oficial game, makes me think of the worst players I have seen playing.
The worst I have seen is a player who captured his opponent's queen with the opponent's own knight, and he didn't noticed, everybody was silent at the time he made the move, and when the other player resigned after loosing his queen, I can remember people on the ground laughing!!!