Event: Norfolk & Norwich Challengers

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Opponent Rating Result
Joe Ross 1700 0 - 1
Matthew McLaughlan 1723 0 - 1
Malcolm Clarke 1440 1 - 0
Murray Raff 1686 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1437 = (6549 + 400 * (1 - 3)) / 4)

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