Event: Chessmaster Challenge 80/10

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Opponent Rating Result
Glen Smith 1143 1 - 0
Robert J Arthurton 1646 0 - 1
Andrew T Watson 1499 0 - 1
Keith May 1103 0 - 1
Gerry Lee 1670 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1252 = (7061 + 400 * (1 - 3)) / 5)

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