Event: County Championship

Opponent Rating Result
Joe Kilshaw 1873 0 - 1
Denis Georgiou 1846 1 - 0
Peter N Walker 0 1 - 0
Murray D Smith 2188 0 - 1
Daniel J Wells 1989 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1499 = (7896 + 400 * (2 - 3)) / 5)

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