Event: R Division

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Opponent Rating Result
Declan Johnston 900 0 - 1
Charlie Locke 750 0 - 1
Declan Johnston 900 0 - 1
Charlie Locke 750 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

625 = (3300 + 400 * (1 - 3)) / 4)

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