Event: Richardson Cup

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Opponent Rating Result
Nathaniel Holroyd-Doveton 141 1 - 0
Steve J Gibbs 147 1 - 0
Kieran O'Driscoll 187 ½ - ½
Jim Davis 173 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

462 = (648 + 400 * (3 - 0)) / 4)

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