Event: Harrogate Evening League 2019-20

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Opponent	Rating	Result
Michael Johnson	135	½ - ½
Mike R Stokes	170	0 - 1
Peter Rawcliffe	141	½ - ½
Paul Pritchard	162	½ - ½

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

52 = (608 + 400 * (0 - 1)) / 4)