Event: Division 1

Opponent Rating Result
David N Walker 1900 1 - 0
Dave J Bray 2043 ½ - ½
George Kolbusz 1900 0 - 1
Alan M Byron 2208 0 - 1
Tom Brown 2058 0 - 1
Graham J Sharpe 2103 ½ - ½
Andrew J Morley 2058 0 - 1
Mark BW Waterfield 1756 1 - 0
George Kolbusz 1900 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1858 = (17926 + 400 * (2 - 5)) / 9)

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