Event: Division 4

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Opponent Rating Result
Derek Whitehurst 104 ½ - ½
Leslie J Fancourt 103 0 - 1
Leslie J Fancourt 103 ½ - ½
Les Hall 87 0 - 1
Jamie D Jones 57 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

11 = (454 + 400 * (1 - 2)) / 5)

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