Event: Division 5

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Opponent Rating Result
Holly Jacobson 89 0 - 1
Peter Clarke 108 0 - 1
Philip Erentz 90 0 - 1
Liam Connolly 0 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

-228 = (287 + 400 * (0 - 3)) / 4)

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