Event: Harrogate Evening League 2021 season

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Opponent	Rating	Result
Glenn Mulholland	0	1 - 0
Ranyl W Hughes	0	1 - 0
Wilbur Summerson	0	1 - 0
John Powell	0	0 - 1
Jim R Postill	0	1 - 0

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

240 = (0 + 400 * (4 - 1)) / 5)