Event: Open

Opponent Rating Result
Simon P Morris 1899 0 - 1
Paul V Byway 1991 0 - 1
Barry A Cheal 2032 0 - 1
Andrew Du Boulay 1799 1 - 0
Ewan Fewell 2039 0 - 1
Simon P Morris 1872 1 - 0
Paul V Byway 2034 0 - 1
Barry A Cheal 2030 1 - 0
Andrew Du Boulay 1778 0 - 1
Ewan Fewell 2046 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1792 = (19520 + 400 * (3 - 7)) / 10)

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