Event: Dons Christmas Allegro

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Opponent Rating Result
Johnny Danger 1520 1 - 0
David E Hall 1951 0 - 1
Stephen Livermore 1594 ½ - ½
Keith C Osborne 1570 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1759 = (6635 + 400 * (2 - 1)) / 4)

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