Event: Chessmaster Challenge 80/10

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Opponent Rating Result
Andrew T Watson 1532 0 - 1
Doug Fossey 0 1 - 0
Robert J Arthurton 1643 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

925 = (3175 + 400 * (1 - 2)) / 3)

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