Event: Ribbands Rapidplay

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Opponent Rating Result
Rob Davies 1337 1 - 0
Ethan Wood 1326 0 - 1
Paul McMahon 1928 0 - 1
Michael MJ Osborn 1494 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1521 = (6085 + 400 * (2 - 2)) / 4)

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