Event: Division 1

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Opponent Rating Result
Ewan Fewell 155 0 - 1
Florian Biermann 170 1 - 0
D Philip Morgan 145 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

157 = (470 + 400 * (1 - 1)) / 3)

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Opponent Rating Result
Steve Hunter 159 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

-241 = (159 + 400 * (0 - 1)) / 1)