Event: Doncaster Jamboree

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Opponent Rating Result
Neil R Lowther 1907 1 - 0
Peter JE Ackley 2147 0 - 1
Martin S Simmonds 1792 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

2082 = (5846 + 400 * (2 - 1)) / 3)

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