Event: MCA Division 3

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Opponent Rating Result
David CA Colbourne 1825 ½ - ½
David CA Colbourne 1816 1 - 0
Marek Korsinskij 1879 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1840 = (5520 + 400 * (1 - 1)) / 3)

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