Event: u1850 County Championship

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Opponent Rating Result
Edward Knox 1688 0 - 1
Colin R Payne 1657 1 - 0
Timothy J Wesson 1761 0 - 1
Peter Baddeley 1622 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1682 = (6728 + 400 * (2 - 2)) / 4)

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