Event: John Davis 6200 League

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Opponent Rating Result
Brian Butterworth 1545 1 - 0
John J Grady 1620 1 - 0
Sean Kane 1577 0 - 1
Matthew Battersby 1402 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1636 = (6144 + 400 * (2 - 1)) / 4)

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