Event: U1800 Cup

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Opponent Rating Result
Laurie Pott 1788 ½ - ½
Les J Jones 1728 1 - 0
Simon Webber 1608 0 - 1
Simon Riley 1698 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1606 = (6822 + 400 * (1 - 2)) / 4)

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