Event: Club cup

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Opponent Rating Result
Aram Swiatkowski 1739 0 - 1
Dominik Swiatkowski 1478 0 - 1
Lawrence Tutt 1241 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1353 = (4458 + 400 * (1 - 2)) / 3)

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