Event: U1450

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Opponent	Rating	Result
Simon Parham	1297	1 - 0
Sammy Hedges	1218	½ - ½
Richard Ball	1418	1 - 0

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

1578 = (3933 + 400 * (2 - 0)) / 3)