Event: Division 1

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Opponent Rating Result
Peter J Mercs 185 ½ - ½
Peter J Mercs 185 1 - 0
Andrew P George 170 ½ - ½
John T Swain 167 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

277 = (707 + 400 * (1 - 0)) / 4)

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