Event: Chessmaster Challenge 80/10

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Opponent Rating Result
Roger Clarke 1302 1 - 0
Alan Ward 1324 1 - 0
Andrew T Watson 1497 ½ - ½
Tony Gill 1375 1 - 0
Paul Terry 1758 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1611 = (7256 + 400 * (3 - 1)) / 5)

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