Event: Ross Cup

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Opponent Rating Result
J Gerry Johnstone 120 ½ - ½
Andrew D Bettley 153 0 - 1
Shaun E Taylor 131 0 - 1
Paul A Allison 143 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

-163 = (547 + 400 * (0 - 3)) / 4)

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