Event: Bak

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Opponent Rating Result
Paul Budahazi 0 0 - 1
Barry Thompson 103 1 - 0
Adrian Arthur 78 1 - 0
Andrew Walker 100 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

170 = (281 + 400 * (2 - 1)) / 4)

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