Event: Division A

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Opponent Rating Result
Neville H Twitchell 1942 1 - 0
Jeffrey Page 1674 0 - 1
Peter Jaszkiwskyj 2007 ½ - ½
Peter W Rose 1840 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1866 = (7463 + 400 * (1 - 1)) / 4)

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