Event: Chessmaster Challenge 80/10

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Opponent Rating Result
Wilf Watson 1484 0 - 1
Amelia Hutchinson 0 1 - 0
Paul Rutter 1416 0 - 1
Keith May 1092 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

798 = (3992 + 400 * (1 - 3)) / 4)

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