Event: 2021 Jamboree

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Opponent	Rating	Result
Guy Greenland	1600	1 - 0
RN Phil Johnson	1623	0 - 1
Mark R Baker	1743	1 - 0

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

1789 = (4966 + 400 * (2 - 1)) / 3)