Event: Norfolk & Norwich Challengers

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Opponent Rating Result
Jack Packwood-Clarke 1400 0 - 1
Mark Nicholls 1447 1 - 0
James Casey 1770 0 - 1
Alex Wheeler 1455 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1318 = (6072 + 400 * (1 - 3)) / 4)

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