Event: Billingham Synthonia Chess Club Championship 2023-24

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Opponent	Rating	Result
Graham Bartram	976	1 - 0
Stephen J jnr Roe	1708	0 - 1
Sean Cooke	959

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

1342 = (2684 + 400 * (1 - 1)) / 2)