Event: Division 1

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Opponent Rating Result
Mark R Le-Vine 202 1 - 0
Kevin R Clark 183 ½ - ½
Chris J Dorrington 220 0 - 1
Richard JD Tozer 214 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

105 = (819 + 400 * (1 - 2)) / 4)

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