Event: Christmas rapidplay

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Opponent Rating Result
Prem C Shah 1111 0 - 1
Siddhi Salvi 0 0 - 1
Richard Parles 1288 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

400 = (2399 + 400 * (0 - 3)) / 3)

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