Event: Division 1

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Opponent Rating Result
Mark A Cundy 1956 0 - 1
Mike J Donnelly 1951 ½ - ½
Richard S Dobedoe 1778 0 - 1
Jonathan Dale 1885 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1593 = (7570 + 400 * (0 - 3)) / 4)

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