Event: Eastman Cup

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Opponent Rating Result
Graham P Alcock 1825 1 - 0
Elmira Mirzoeva 412 ½ - ½
Annie Hawes 1595 1 - 0
Thomas O'Brien 1400 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1608 = (5232 + 400 * (3 - 0)) / 4)

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