Event: 2021 Jamboree

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Opponent	Rating	Result
David Stone	0	1 - 0
Andrew F Footner	2065	1 - 0
Graham Steer	0	0 - 1

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

822 = (2065 + 400 * (2 - 1)) / 3)