Event: Roger Goldsmith Div 2

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Opponent Rating Result
Robert Lepley 93 ½ - ½
Benjamin Varea 93 0 - 1
Nick Atkin 85 0 - 1
Raf Calumpiano 60 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

-17 = (331 + 400 * (1 - 2)) / 4)

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