Event: Harrogate Evening League 2019-20

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Opponent	Rating	Result
Mate Ther	178	0 - 1
Frank T Sheldrick	143	½ - ½
Mark Daley	164	½ - ½

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

28 = (485 + 400 * (0 - 1)) / 3)