Event: John Davis 6200 League

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Opponent Rating Result
Peter Paine 1353 1 - 0
Brian D Corner 1487 1 - 0
James Redman 1300 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1780 = (4140 + 400 * (3 - 0)) / 3)

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