Event: Billingham Synthonia Chess Club May 2023 Rapid

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Opponent	Rating	Result
Bernie Callaghan	1632	1 - 0
Liam Laing	1662	1 - 0
Graham E Edwards	1293	1 - 0

performance = (sum(opponents ratings) + 400(wins-losses)) / games

1929 = (4587 + 400 * (3 - 0)) / 3)