Event: Division 2

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Opponent Rating Result
Colin R Ramage 1908 0 - 1
Neville H Twitchell 1923 0 - 1
Philip Staniland 1851 0 - 1
Dennis B Paul 1650 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1633 = (7332 + 400 * (1 - 3)) / 4)

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