I've searched a couple of websites about the game, and I could only find 1 mention of this situation, and even then they did not say what the result would be.

I've asked on a yahoo discussion board about the game what should happen.

I would guess either (1) the player just passes the turn or (2) loses the game or (3) game is a draw.

Once we know what is suppose to happen, we can probable have Fencer program it so that it will happen. I will let you know when/if I get an answer.