Event: Division 2

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Opponent Rating Result
Keith B Cook 1661 1 - 0
Keith S Jones 1782 1 - 0
Graham J Kershaw 1683 0 - 1
Stephen W Berkley 1761 ½ - ½
Neville H Twitchell 1965 0 - 1
Sergey Pereslavtsev 1587 1 - 0
Sergey Pereslavtsev 1587 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1832 = (12026 + 400 * (4 - 2)) / 7)

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