Event: Harrogate Evening League 2021 season

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Opponent	Rating	Result
John Powell	0	½ - ½
David Thorn	0	1 - 0
Richard Tate	0	0 - 1
Jonathan Wood	0	1 - 0
Jim R Postill	0	½ - ½

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

80 = (0 + 400 * (2 - 1)) / 5)