Event: Hammersmith Sledgehammer Cup

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Opponent	Rating	Result
David Lambert	1614	1 - 0
Charles A Sturt	1701	0 - 1
C Kenneth Kwabiah	1531	½ - ½

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

1615 = (4846 + 400 * (1 - 1)) / 3)