Event: Chessmaster Challenge 80/10

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Opponent Rating Result
Keith May 993 1 - 0
Paul Rutter 1419 0 - 1
Alan Ward 0 0 - 1
Tony Gill 0 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

603 = (2412 + 400 * (2 - 2)) / 4)

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