Event: Hammersmith Sledgehammer Cup

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Opponent	Rating	Result
Peter Hessey	1270	1 - 0
Todd Sandler	1648	0 - 1
Charles Rigby	1496	0 - 1

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

1338 = (4414 + 400 * (1 - 2)) / 3)