Event: Summer Open Division

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Opponent Rating Result
Kevin Hurney 185 1 - 0
Dave M Davies 150 1 - 0
Kevin Hurney 185 0 - 1
Dave M Davies 150 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

168 = (670 + 400 * (2 - 2)) / 4)

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