Event: City Chess Swiss 2017-18

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Opponent Rating Result
B Peter A Andrews 0 1 - 0
Charles L Proctor 0 ½ - ½
Julian T Farrand 0 0 - 1
Rob Cregan 0 ½ - ½
David J Wilson 0 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

-80 = (0 + 400 * (1 - 2)) / 5)

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