Event: Chessmaster Challenge 80/10

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Opponent Rating Result
Andrew T Watson 1464 1 - 0
Tony Lee 1247 1 - 0
Alan Ward 1348 1 - 0
Robert J Arthurton 1623 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1821 = (5682 + 400 * (4 - 0)) / 4)

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