Event: Harrogate Evening League 2018-19

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Opponent	Rating	Result
Frank T Sheldrick	143	0 - 1
Peter Rawcliffe	143	1 - 0
Steven Revell	150	1 - 0

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

279 = (436 + 400 * (2 - 1)) / 3)