Event: Broadstairs Summer Swiss

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Opponent Rating Result
Manoj Natarajan 1780 0 - 1
Paul Verrall 1369 0 - 1
Reginald G Pidduck 1473 0 - 1
David Clifford 888 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1178 = (5510 + 400 * (1 - 3)) / 4)

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