Event: Division 2

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Opponent Rating Result
Gary C Jackson 1903 0 - 1
Francis W Sagyaman 2095 0 - 1
Robert Reynolds 1805 ½ - ½
Chris Ward 1800 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1801 = (7603 + 400 * (1 - 2)) / 4)

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