Event: Division 1

Opponent Rating Result
Robert A Dean 1828 1 - 0
Callum Welsh 1919 1 - 0
Dave Patrick 1785 ½ - ½
Mark D Crowther 2159 0 - 1
James Hall 1969 0 - 1
Mike Bramson 2019 ½ - ½
Dave Patrick 1810 0 - 1
Mark D Crowther 2165 0 - 1
Peter Shaw 2119 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1841 = (17773 + 400 * (2 - 5)) / 9)

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