Event: Norman Ellis

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Opponent Rating Result
Peter F Mason 149 ½ - ½
Paul Howden 140 1 - 0
Frank T Sheldrick 143 1 - 0
Robert Starley 194 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

457 = (626 + 400 * (3 - 0)) / 4)

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