Event: Billingham Synthonia Chess Club May 2023 Rapid

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Opponent Rating Result
Paul Scott 1307 1 - 0
Sean Cooke 1134 1 - 0
Darren John Donnison 1699 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1780 = (4140 + 400 * (3 - 0)) / 3)

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