Event: Division Six

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Opponent Rating Result
Richard F Collett 90 1 - 0
Roger Bray 107 0 - 1
John A Moore 46 1 - 0
Bob Hackett 78 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

280 = (321 + 400 * (3 - 1)) / 4)

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