Event: Ross Cup

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Opponent Rating Result
Graham Chesters 167 0 - 1
Colin R Baxter 133 ½ - ½
Chris J Matthews 144 0 - 1
Oleg Dukalev 142 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

-154 = (586 + 400 * (0 - 3)) / 4)

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