Event: Harrogate Evening League 2021 season

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Opponent	Rating	Result
Jeff Dutton	0	1 - 0
John Tate	0	1 - 0
RAB (Bob) Maltby	0	1 - 0
Steve Collins	0	1 - 0
Mark Daley	0	1 - 0

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

400 = (0 + 400 * (5 - 0)) / 5)