Event: Championship 2023

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Opponent Rating Result
James P Collier 1817 ½ - ½
Andy J Bagley 1866 0 - 1
Nigel Stansbie 1429 1 - 0
Keith J Riach 1661 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1593 = (6773 + 400 * (1 - 2)) / 4)

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