Event: Dudley Townshend Trophy

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Opponent Rating Result
Dave Hodkinson 122 0 - 1
Nathanael Kasafir 0 0 - 1
John Smith 154 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

-308 = (276 + 400 * (0 - 3)) / 3)

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