Event: Harrogate Evening League 2018-19

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Opponent	Rating	Result
Paul May	154	½ - ½
Jonathan Round	170	0 - 1
Chris Wright	168	0 - 1
Mike R Stokes	188	1 - 0
E Gordon Marks	136	1 - 0

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

163 = (816 + 400 * (2 - 2)) / 5)