Event: Chessmaster Challenge 80/10

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Opponent Rating Result
Michael Brant 988 1 - 0
Paul Rutter 1412 1 - 0
Robert J Arthurton 1568 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1589 = (3968 + 400 * (2 - 0)) / 3)

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