Event: Rapid Play League

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Opponent Rating Result
Sam Hattersley 1898 0 - 1
Sam Hattersley 1898 1 - 0
Stylianos Oikonomou 0 0 - 1
Stylianos Oikonomou 0 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

949 = (3796 + 400 * (2 - 2)) / 4)

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