Event: Division A

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Opponent Rating Result
John Whitfield 159 ½ - ½
Mark Taylor 153 1 - 0
Harry Newman 0 1 - 0
Martin Pope 0 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

278 = (312 + 400 * (2 - 0)) / 4)

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