Event: Division 2

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Opponent Rating Result
Jonathon Swift 101 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

101 = (101 + 400 * (0 - 0)) / 1)

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Opponent Rating Result
Jonathon Swift 101 0 - 1
John S Shaw 139 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

-80 = (240 + 400 * (0 - 1)) / 2)