Event: Norman Ellis

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Opponent Rating Result
Andy Ross 138 1 - 0
Robert Starley 194 0 - 1
Peter Braham 148 1 - 0
Peter F Mason 149 0 - 1
Frank T Sheldrick 143 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

74 = (772 + 400 * (2 - 3)) / 5)

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