Event: Richardson Cup

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Opponent Rating Result
Andrew P Baxter 124 ½ - ½
Jonathan W Arnott 192 1 - 0
Jonathan P Nelson 203 ½ - ½
Jonathan A Tait 195 1 - 0(def)
performance = (sum(opponents ratings) + 400(wins-losses)) / games

306 = (519 + 400 * (1 - 0)) / 3)

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