Event: Harrogate Evening League 2022 season

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Opponent Rating Result
Jeff Dutton 1561 1 - 0
Andrew Zigmond 1640 0 - 1
Jim R Postill 1447 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1549 = (4648 + 400 * (1 - 1)) / 3)

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Opponent Rating Result
Charlie Wainwright 0 0 - 1
Peter Gregory 1556 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

378 = (1556 + 400 * (0 - 2)) / 2)