Event: Division 2 East

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Opponent Rating Result
Chris S Purry 161 ½ - ½
Andrew M Gregory 167 ½ - ½
Tim F Woodward 153 1 - 0
Chris S Purry 161 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

361 = (642 + 400 * (2 - 0)) / 4)

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