Event: Division A

Opponent Rating Result
Paul A Evans 2073 ½ - ½
Philip N Raynor 1731 0 - 1
Peter A Garrett 1730 ½ - ½
Colin M Walker 1873 ½ - ½
Tak-Shing Chan 0 1 - 0
Graham J Ashcroft 1866 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1479 = (9273 + 400 * (1 - 2)) / 6)

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