Event: Challengers 2023

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Opponent Rating Result
Ellis Manning 0 0 - 1
Lennon Jarman 0 0 - 1
Richard J Ballantyne 0 0 - 1
Leslie Barron 0 0 - 1
Ian Henry 0 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

-400 = (0 + 400 * (0 - 5)) / 5)

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