Event: Ron Bruce League

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Opponent Rating Result
Paul Brooks 163 1 - 0
Martin Quinn 145 ½ - ½
Megan E O'Brien 156 1 - 0
David Twine 180 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

261 = (644 + 400 * (2 - 1)) / 4)

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