Event: November/December rapidplay

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Opponent Rating Result
Abhimanyu Janharlal 501 0 - 1
Abhimanyu Janharlal 501 ½ - ½
Lawrence Waller 317 0 - 1
Lawrence Waller 332 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

313 = (1651 + 400 * (1 - 2)) / 4)

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