Event: Division 2

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Opponent Rating Result
Sam Walmsley 0 0 - 1
Gordon L Glover 120 0 - 1
John Moxham 0 1 - 0
William T Jones 0 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

30 = (120 + 400 * (2 - 2)) / 4)

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