Event: Billingham Synthonia November 2022 Rapid

Opponent Rating Result
Graham Bartram 1456 1 - 0
Matthew Mawson 0 1 - 0
Stephen J jnr Roe 0 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

619 = (1456 + 400 * (2 - 1)) / 3)

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