Event: Quickplay KO 2019-20

Opponent Rating Result
James C Mansson 193 0 - 1
James C Mansson 193 0 - 1
W John Marshall 127 0 - 1
W John Marshall 127 1 - 0
W John Marshall 127 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

-87 = (767 + 400 * (1 - 4)) / 5)

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