Event: KO 2021-22

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Opponent	Rating	Result
James C Mansson	2103	0 - 1
Roger Waddingham	1474	1 - 0
W John Marshall	1754	0 - 1

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

1644 = (5331 + 400 * (1 - 2)) / 3)