Event: Harrogate Evening League 2018-19

Opponent Rating Result
Jim R Postill 110 ½ - ½
Richard Tate 116 0 - 1
Cameron Funnel 125 0 - 1
David Halpin 61 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

3 = (412 + 400 * (1 - 2)) / 4)

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