Event: Billingham Synthonia Chess Club Championship 2023-24

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Opponent	Rating	Result
Stephen J jnr Roe	1708	0 - 0
Harry Tennant	1350	0 - 1
Andrew Herrity	1000	0 - 1
Graham Bartram	976	0 - 1

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

709 = (3326 + 400 * (0 - 3)) / 3)