Event: City Chess Swiss 2019-20

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Opponent Rating Result
Geoff W Naldrett 1615 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

2015 = (1615 + 400 * (1 - 0)) / 1)

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Opponent Rating Result
Boye Sodeke 0 1 - 0
Tony D Wells 0 0 - 1
Gary E Walker 0 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

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