Event: Open

Opponent Rating Result
Andrew Du Boulay 1805 1 - 0
Barry A Cheal 0
George Smith 0
Ewan Fewell 0
Andrew Du Boulay 0
Barry A Cheal 0
George Smith 0
Ewan Fewell 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

2205 = (1805 + 400 * (1 - 0)) / 1)

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