Your in check if you move the Knight by Re8.
By the way, upon noticing, although I answered accordingly because you thought there was a glitch...But you are not suppose to ask for suggestions during a in process game.
Unable to move my Knight
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I am unable to move my Knight. Seems like a glitch or a rule that I don't know about. Any suggestions? Here's the game: http://www.chess.com/echess/game.html?id=45157321#
Thanks