Event: League Division 3

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Opponent Rating Result
Edward Rivlin 1365 ½ - ½
Steve Jackson 0 0 - 1
Maria Beatriz Andrade 0 1 - 0
Kenneth L Marsden 1369 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

684 = (2734 + 400 * (1 - 1)) / 4)

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