Event: u1850 County Championship

Opponent Rating Result
Steve Lovell 1809 0 - 1
David J Payne 1787 1 - 0
Brian D Judkins 1768 0 - 1
Andrew J Donnelly 1834 0 - 1
John E Dolamore 1769 0 - 1
Brian D Judkins 1768 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1589 = (10735 + 400 * (1 - 4)) / 6)

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