Event: City Chess Swiss 2019-20

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Opponent	Rating	Result
Anthony GC Paish	1548	1 - 0
Tudor A Siminic	1773	½ - ½
Atta Chui	0	1 - 0
David J Wilson	0	1 - 0

performance = (sum(opponents ratings) + 400(wins-losses)) / games

1130 = (3321 + 400 * (3 - 0)) / 4)