Event: Mini League

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Opponent Rating Result
Colin S Procter 1893 1 - 0
Paul Howden 1787 ½ - ½
Jon Jordan 1618 ½ - ½
John Grasham 1647 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1836 = (6945 + 400 * (1 - 0)) / 4)

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