Event: Lytham Summer Tournament

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Opponent Rating Result
Patrick N Coleman 108 1 - 0
Colin Wilks 102 ½ - ½
Kit W Hopkins 179 0 - 1
Peter A Wilson 145 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

234 = (534 + 400 * (2 - 1)) / 4)

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