Event: Division 3

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Opponent Rating Result
Roy J Gurney 1405 1 - 0
Nigel Smith 1100 1 - 0
Edda Walker 813 1 - 0
Richard T Davis 1405 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1381 = (4723 + 400 * (3 - 1)) / 4)

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