Event: S&D Knockout Championship

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Opponent Rating Result
Mike Dew 110 1 - 0
John P Mainwaring 136 ½ - ½
John P Mainwaring 136 1 - 0
Steven Lewis 161 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

236 = (543 + 400 * (2 - 1)) / 4)

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