Event: KO 2021-22

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Opponent Rating Result
Ian K Edgson 1639 0 - 1
Peter Rankin 0 1 - 0
Richard Barrowclough 1545 1 - 0
W John Marshall 1793 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1444 = (4977 + 400 * (3 - 1)) / 4)

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