Event: R Division

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Opponent Rating Result
Alicia Custy 1428 0 - 1
Nigel Holland 1418 0 - 1
Alicia Custy 1428 0 - 1
Nigel Holland 1418 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1223 = (5692 + 400 * (1 - 3)) / 4)

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