Event: Winter Blitz

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Opponent Rating Result
Carl Purkiss 0 0 - 1
Heather Enid Walker 0 1 - 0
Cristina Casti 0 0 - 1
Roy Hughes 0 0 - 1
Anthony J Arnold 0 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

-80 = (0 + 400 * (2 - 3)) / 5)

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