Event: Harrogate Evening League 2019-20

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Opponent	Rating	Result
David Harasym	135	0 - 1
Samuel Bermejo	0	0 - 1
John Swiers	95	0 - 1

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

-323 = (230 + 400 * (0 - 3)) / 3)