Event: Division A

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Opponent Rating Result
John G Cooper 165 0 - 1
Graham W Dobson 171 0 - 1
John G Cooper 165 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

-100 = (501 + 400 * (0 - 2)) / 3)

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Opponent Rating Result
Rob Gallagher 157 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

-243 = (157 + 400 * (0 - 1)) / 1)