Event: U1640 Tournament

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Opponent	Rating	Result
Neil Hambly	1596	½ - ½
Neil Hambly	1596	1 - 0
John Scotter	1476	0 - 1

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

1556 = (4668 + 400 * (1 - 1)) / 3)