Event: Division One

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Opponent Rating Result
Keith Brack 104 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

104 = (104 + 400 * (0 - 0)) / 1)

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Opponent Rating Result
Robert A Dean 150 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

-250 = (150 + 400 * (0 - 1)) / 1)