Event: City Chess Swiss 2019-20

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Opponent Rating Result
Charles L Proctor 1750 ½ - ½
David J Wilson 0 ½ - ½
Michael R Wiltshire 0 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

717 = (1750 + 400 * (1 - 0)) / 3)

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