Event: Division Two

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Opponent Rating Result
Ashley Smith 136 ½ - ½
Mike P Maher 136 ½ - ½
Ken AJ Francis 116 ½ - ½
Andrew Cottom 134 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

31 = (522 + 400 * (0 - 1)) / 4)

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