Event: Billingham Synthonia Chess Club May 2023 Rapid

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Opponent	Rating	Result
Nick Tadd	1274	1 - 0
Graham E Edwards	1293	0 - 1
Fraser Craig	1325	0 - 1

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

1164 = (3892 + 400 * (1 - 2)) / 3)