Event: R Division

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Opponent Rating Result
Shahzaib Qumar 1000 ½ - ½
Declan Johnston 900 0 - 1
Shahzaib Qumar 1000 0 - 1
Declan Johnston 900 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

650 = (3800 + 400 * (0 - 3)) / 4)

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