Event: Christmas rapidplay

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Opponent Rating Result
Ishaan Chadha 1229 0 - 1
Shiven Behl 0 ½ - ½
Joseph Cassar 0 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

410 = (1229 + 400 * (1 - 1)) / 3)

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