Event: Christmas rapidplay

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Opponent Rating Result
Lawrence Waller 341 1 - 0
Ananya Patel 1450 0 - 1
Rishabh Sidana 1751 0 - 1
Richard Parles 1163 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1076 = (4705 + 400 * (1 - 2)) / 4)

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