Event: Mamhead league

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Opponent Rating Result
Sam Coutu-Oughton 0 0 - 1
Robert G Wilby 140 ½ - ½
Clifford B Peach 106 ½ - ½
James Gibbs 40 1 - 0
Malcolm Belt 119 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

81 = (405 + 400 * (1 - 1)) / 5)

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