Event: Open County Championship

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Opponent Rating Result
James Gardner 2088 0 - 1
Ken B McEwan 2125 0 - 1
Jan Balogh 2014 1 - 0
Adrian G Elwin 1952 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1845 = (8179 + 400 * (1 - 3)) / 4)

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