Event: 560 Max

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Opponent Rating Result
Martin J Draper 110 ½ - ½
Kim T Gilbert 119 1 - 0
Martin J Draper 110 1 - 0
Kim T Gilbert 119 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

215 = (458 + 400 * (2 - 1)) / 4)

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