Event: 400 League

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Opponent Rating Result
Robert Black 80 0 - 1
Robert Black 126 1 - 0
Robert Black 126 0 - 1
Anthony G Steele 80 ½ - ½
Robert Black 80 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

-62 = (492 + 400 * (1 - 3)) / 5)

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