Event: Cumnor BLT

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Opponent	Rating	Result
Pedro Monteiro	1116	1 - 0
Jeffrey Bryant	1161	0 - 1
Allan Evans	1633	1 - 0

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

1437 = (3910 + 400 * (2 - 1)) / 3)