Event: Gambit Rapidplay

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Opponent Rating Result
Nikolai Harrison 1585 1 - 0
Nikolai Harrison 1585 0 - 1
John R Huthwaite 1764
John R Huthwaite 1764
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1585 = (3170 + 400 * (1 - 1)) / 2)

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