Event: The Friendly League

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Opponent Rating Result
Dave S Almond 1737 0 - 1
William T Jones 0 1 - 0
Andrew Thornley 1423 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1187 = (3160 + 400 * (2 - 1)) / 3)

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Opponent Rating Result
Mark R Stollery 1698 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1298 = (1698 + 400 * (0 - 1)) / 1)