Event: Norman Ellis

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Opponent Rating Result
Randolph E Donahue 165 ½ - ½
Chris Wright 168 0 - 1
John Brooke 113 1 - 0
Andy J Bagley 165 1 - 0
Paul Howden 140 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

310 = (751 + 400 * (3 - 1)) / 5)

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