Event: Dons Christmas Allegro

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Opponent Rating Result
Chris Jones 1583 1 - 0
John A Wood 1983 0 - 1
David J Twitchell 1899 ½ - ½
Alexander New 1766 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1708 = (7231 + 400 * (1 - 2)) / 4)

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