Event: City Chess Swiss 2022-23

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Opponent	Rating	Result
Gennady B Kupava	1548	1 - 0
D Ian Calvert	1993	1 - 0
D Ian Calvert	1993	0 - 1

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

1978 = (5534 + 400 * (2 - 1)) / 3)