Event: September 2022 Rapid

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Opponent Rating Result
Graham Bartram 1456 1 - 0
Geoffrey Howsden 1556 1 - 0
Darren John Donnison 1577 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1663 = (4589 + 400 * (2 - 1)) / 3)

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