Event: A Division

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Opponent Rating Result
Brian R Myers 144 ½ - ½
Dave Dixon 148 0 - 1
Richard VM Hall 176 0 - 1
Garry J Hewitt 125 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

-152 = (593 + 400 * (0 - 3)) / 4)

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