Event: u1850 County Championship

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Opponent Rating Result
David E McLean 1697 1 - 0
Richard McMorran 1678 1 - 0
Roger H Gordonsmith 1835 0 - 1
Trevor J Ansell 1845 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1764 = (7055 + 400 * (2 - 2)) / 4)

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