Event: E Division

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Opponent Rating Result
Tom Wilson 1409 1 - 0
Peter Hurn 1560 0 - 1
Stuart Sumner 1537 1 - 0
Leo Cheung 1404 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1478 = (5910 + 400 * (2 - 2)) / 4)

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