Event: A Division

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Opponent Rating Result
Mahin Rughani 1963 0 - 1
Noel S McLaughlin 1928 1 - 0
Chris Vassiliou 1959 ½ - ½
Peter J Mulleady 1966 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1954 = (7816 + 400 * (1 - 1)) / 4)

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