Event: Christmas Allegro

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Opponent Rating Result
Martin G Walker 2123 0 - 1
David C May 1547 1 - 0
Stephen LA Orton 2070 0 - 1
Johnny Danger 1520 1 - 0
Armando Galletti 1593 0 - 1
Heather Enid Walker 1059 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1652 = (9912 + 400 * (3 - 3)) / 6)

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