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I presume that capturing the opponent's King on the eighth rank with your last Pawn also wins. This is clear from the logic of the loss conditions, but you might want to state this explicitly.

Also, stalemating by promoting your last pawn should win.


You may wish to consider triple repetition as a loss--this is fairly common where stalemate is a loss.


I intend these suggestions as minor clarifications for a very fine game.