Event: Broadstairs Summer Swiss

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Opponent Rating Result
Paul Johnson 129 0 - 1
Joshua Vaughan 98 1 - 0
Michael Doyle 90 0 - 1
Reginald G Pidduck 100 0 - 1
David Clifford 46 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

13 = (463 + 400 * (2 - 3)) / 5)

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