Event: Summer Max 480 Division

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Opponent Rating Result
Jim Barrett 136 0 - 1
Philip C Maybury 132 ½ - ½
Keith Butler 117 1 - 0
Jim Barrett 136 1 - 0
Mike J Hollier 130 0 - 1
Philip C Maybury 132 0 - 1
Keith Butler 117 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

71 = (900 + 400 * (2 - 3)) / 7)

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