Event: Billingham Synthonia Chess Club May 2023 Rapid

Opponent Rating Result
Matthew Tyson 1000 1 - 0
Darren John Donnison 1699 0 - 1
Bernie Callaghan 1632 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1577 = (4331 + 400 * (2 - 1)) / 3)

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