Event: Division One

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Opponent Rating Result
David W Anderton 191 1 - 0
Ian S Kingston 178 1 - 0
Steven Briggs 182 1 - 0
Ann-Marie James 175 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

482 = (726 + 400 * (3 - 0)) / 4)

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