Event: Division 4

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Opponent Rating Result
Ernest Wilkinson 96 ½ - ½
Clive N Ferry 129 ½ - ½
Kenneth J McNulty 141 ½ - ½
Clive N Ferry 129 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

224 = (495 + 400 * (1 - 0)) / 4)

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