Event: Division Four

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Opponent Rating Result
Mike J Groombridge 131 0 - 1
Ian Wood 127 1 - 0
Peter I Thompson 181 0 - 1
Robert Marks 134 ½ - ½
Michael Share 130 1 - 0
Don S Curry 123 1 - 0
Roger Ball 112 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

248 = (938 + 400 * (4 - 2)) / 7)

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