Event: Division 1

Opponent Rating Result
Andrew F Footner 183 1 - 0
Chris S Purry 161 1 - 0
Andrew F Footner 183 1 - 0
Kevin J Thurlow 173 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

475 = (700 + 400 * (3 - 0)) / 4)

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