What is the rule?

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SILVERBUG

I am up by a piece and close to winning but my opponent is putting my king in check over and over. My king is forced to make the same move every time, and then back to it's original position after the next check. We have made the same series of moves over 5 times now.

bigpoison

After you move, go back to the game screen--while it is your opponents move--and hit the "claim draw" button.

SILVERBUG
Thanks, game ended as draw.
AndyClifton

You had an interesting win in there a bit earlier btw:  35... Qh1+ 36 Ke2 Qg2+ 37 Nf2 f3+ 38 Ke3 Bg5+ 39 Ke4 Rhe8+ 40 Kf5 g6+ 41 Kxg6 Bd2+.

bigpoison

37.  f3+!!!!

Very interesting line.  Thanks Andy.