Event: JTCC South London

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Opponent Rating Result
Louka Yiasoumi 1140 0 - 1
Gabriel Clarke 0 0 - 1
Jan Birbee 746 0 - 1
Sophie Sermon 0 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

272 = (1886 + 400 * (1 - 3)) / 4)

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