Event: Lytham Summer Tournament

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Opponent Rating Result
Roy Ellames 198 0 - 1
Patrick N Coleman 108 1 - 0
John G Cooper 165 0 - 1
Robert Tinton 125 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

-51 = (596 + 400 * (1 - 3)) / 4)

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