Event: KO 2021-22

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)

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