Event: Division 2

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Opponent Rating Result
Laurence A Butt 161 1 - 0
Chris W Heath 158 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

160 = (319 + 400 * (1 - 1)) / 2)

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Opponent Rating Result
Colin D Clark 122 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

522 = (122 + 400 * (1 - 0)) / 1)