Event: Division 5

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Opponent Rating Result
Sandra G Blackburn 118 ½ - ½
Stephen G Wootton 121 0 - 1
Caroline L Mountford 115 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

118 = (354 + 400 * (1 - 1)) / 3)

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