Event: Division 2

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Opponent Rating Result
Graham Robertson 0 ½ - ½
W John Marshall 1739 0 - 1
Derek Cosens 1705 ½ - ½
Jon AN Lawrance 1878 0 - 1
Derek Cosens 1686 1 - 0
Asanka Amarasinghe 0 0 - 1
Paul Fisher 0 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

830 = (7008 + 400 * (1 - 4)) / 7)

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