Event: Dave Nicholas Summer League

Opponent Rating Result
Steve J Dyer 123 0 - 1
James Palk 117 0 - 1
Steve J Dyer 123 0 - 1
James Palk 117 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

-80 = (480 + 400 * (1 - 3)) / 4)

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