Event: Haslemere Trophy

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Opponent Rating Result
Geoffrey A Foxon 1795 1 - 0
Daniel Shek 1725 0 - 1
Daniel Shek 1725 0 - 1
Geoffrey A Foxon 1795 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1760 = (7040 + 400 * (2 - 2)) / 4)

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