Event: Division 4

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Opponent Rating Result
Richard Maconnachie 1323 0 - 1
Amrik Tahim 1195 0 - 1
Vijay Gulab 1593 0 - 1
Graham Bird 1250 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1140 = (5361 + 400 * (1 - 3)) / 4)

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