Event: Division 5

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Opponent Rating Result
Joe Firth 406 0 - 1
W Gareth Ward 1420 0 - 1
David J Archer 1420 0 - 1
Robert S Pigeon 1510 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

789 = (4756 + 400 * (0 - 4)) / 4)

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