Event: Billingham Synthonia November 2022 Rapid

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Opponent	Rating	Result
Brian Whitaker	1650	1 - 0
Paul Weightman	1434	0 - 1
Graham E Edwards	1270	0 - 1

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

1318 = (4354 + 400 * (1 - 2)) / 3)