Event: Uxbridge Classic

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Opponent	Rating	Result
Mabel Forster-Tenny	815	0 - 1
Ludovic Powell	0	0 - 1
Ludovic Powell	0	½ - ½
Shawn Boby	1260	0 - 1
Shawn Boby	1260	1 - 0
Roy Nathaniel Ho	0	0 - 1
Shawn Boby	1273	1 - 0
Fergus Clarke-Hearn	1537	0 - 1

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

618 = (6145 + 400 * (2 - 5)) / 8)