Event: City Chess League 2019-20

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Opponent	Rating	Result
Antony C Hall	1855	0 - 1
David A Morgan	0	½ - ½
Travis Shafer	0	½ - ½

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

485 = (1855 + 400 * (0 - 1)) / 3)