Event: Strong KO

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Opponent	Rating	Result
James Day	1722	½ - ½
James Day	1722	1 - 0
Michael H Stinton-Brownbridge	153	0 - 1

performance = (sum(opponents ratings) + 400(wins-losses)) / games

1199 = (3597 + 400 * (1 - 1)) / 3)