Event: Norfolk County Chess Championships- Challengers

Opponent Rating Result
Alex Wheeler 1433 1 - 0
Bharath Klass 1721 ½ - ½
Colin R Payne 1641 1 - 0
Steve Sanders 1600 1 - 0
Ben Yelverton 1734 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1866 = (8129 + 400 * (3 - 0)) / 5)

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