Event: R Division

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Opponent Rating Result
Tim Goddard 1410 ½ - ½
James Parker 1034 0 - 1
Tim Goddard 1410 0 - 1
James Parker 1034 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1122 = (4888 + 400 * (1 - 2)) / 4)

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