Event: Harrogate Evening League 2018-19

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Opponent	Rating	Result
Paul May	154	1 - 0
Mark Daley	171	1 - 0
E Gordon Marks	136	1 - 0
Mike R Stokes	188	½ - ½
Mark W Rogerson	174	½ - ½

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

405 = (823 + 400 * (3 - 0)) / 5)