Event: Harrogate Evening League 2019-20

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Opponent	Rating	Result
Mate Ther	178	½ - ½
Mark Daley	164	0 - 1
Adam D Hall	0	0 - 1

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

-153 = (342 + 400 * (0 - 2)) / 3)