Event: Rapid Play League

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Opponent Rating Result
Stewart Robertson 0 1 - 0
Stewart Robertson 0 0 - 1
James P Collier 1754 0 - 1
James P Collier 1754 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

677 = (3508 + 400 * (1 - 3)) / 4)

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