Event: Harrogate Evening League 2022 season

Opponent Rating Result
Andrew C Wainwright 2000 0 - 1
Andrew Zigmond 0 ½ - ½
William Boothman 1769 0 - 1
David Harasym 0 0 - 1
Paul Butterworth 1792 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

792 = (5561 + 400 * (0 - 4)) / 5)

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