Event: Derbyshire Individual

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Opponent Rating Result
Fred Biles 99 1 - 0
David JF Woodhouse 126 1 - 0
Tomasz D Adamski 121 0 - 1
Matthew Bubis 135 0 - 1
Martin Cobham 142 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

45 = (623 + 400 * (2 - 3)) / 5)

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