Event: Billingham Synthonia December 2022 Rapid

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Opponent Rating Result
Brian Whitaker 1626 1 - 0
Matthew Mawson 1366 1 - 0
Sean Cooke 1139 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1777 = (4131 + 400 * (3 - 0)) / 3)

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