Event: Billingham Synthonia Chess Club August 2024 Rapid

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Opponent	Rating	Result
John S Garnett	2047	0 - 1
Alex Costello	1000	1 - 0
Bernie Callaghan	1472	1 - 0

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

1640 = (4519 + 400 * (2 - 1)) / 3)