Event: Division 3

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Opponent Rating Result
William Hulley 1736 1 - 0
Peter J Pearson Jones 1675 ½ - ½
David Jarvis 1499 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1903 = (4910 + 400 * (2 - 0)) / 3)

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