Event: Harrogate Evening League 2021 season

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Opponent	Rating	Result
Mark Daley	0	½ - ½
Jeff Dutton	0	1 - 0
Ruben Wilberg	0	½ - ½
Dion Luzha	0	0 - 1
David Harasym	0	0 - 1

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

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