Event: Division 1

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Opponent Rating Result
John Whitfield 150 0 - 1
Peter Dickinson 116 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

133 = (266 + 400 * (1 - 1)) / 2)

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Opponent Rating Result
Steve Whitehead 154 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

-246 = (154 + 400 * (0 - 1)) / 1)