Event: Cambs Division 2

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Opponent Rating Result
Daniel Finch 1574 0 - 1
Richard McMorran 1640 0 - 1
Neil Chedd 1757 0 - 1
Matthew Graeme 1187 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1340 = (6158 + 400 * (1 - 3)) / 4)

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