Event: Division 5

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Opponent Rating Result
Thomas Pownall 95 0 - 1
Daniel Walker 103 1 - 0
Alistaire Davidson 40 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

213 = (238 + 400 * (2 - 1)) / 3)

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Opponent Rating Result
John Pocock 100 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

-300 = (100 + 400 * (0 - 1)) / 1)