Event: Norman Ellis

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Opponent Rating Result
Warren B Dennison 175 ½ - ½
Dale H Cullum 134 1 - 0
Mike Bramson 162 1 - 0
Tom Leah 171 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

261 = (642 + 400 * (2 - 1)) / 4)

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