Event: Worcestershire Rapidplay league

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Opponent Rating Result
John F Varilone 1619 1 - 0
Chetan Mutagekar 0 0 - 1
John F Varilone 1619 1 - 0
Chetan Mutagekar 0 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

810 = (3238 + 400 * (2 - 2)) / 4)

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