Event: U1640 Tournament

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Opponent Rating Result
Stuart Sharp 1385 ½ - ½
Stuart Sharp 1385 1 - 0
David Atkin 1367 1 - 0
Sean Smith 1414 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1488 = (5551 + 400 * (2 - 1)) / 4)

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