Event: Harrogate Evening League 2021 season

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Opponent	Rating	Result
Joey Fell	0	1 - 0
Alex Stokes	0	0 - 1
Brendan Smith	0	1 - 0
David Halpin	0	½ - ½
John Swiers	0	1 - 0

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

160 = (0 + 400 * (3 - 1)) / 5)