Event: Division 2

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Opponent Rating Result
Alex B Combie 171 ½ - ½
Andrew Stevens 0 ½ - ½
Francis J Bowers 166 0 - 1
Chris Hill 147 ½ - ½
Armaan Gogia 167 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

50 = (651 + 400 * (0 - 1)) / 5)

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