Event: Division 1

Opponent Rating Result
Richard S Dobedoe 1786 0 - 1
Mal Waddell 1861 ½ - ½
Alexander Roberts 1805 1 - 0
Arnold Peace 1703 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1889 = (7155 + 400 * (2 - 1)) / 4)

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