Event: R Division

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Opponent Rating Result
Terry Robinson 1152 1 - 0
Paul H Czyrski 1100 ½ - ½
Terry Robinson 1152 1 - 0
Paul H Czyrski 1100 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1226 = (4504 + 400 * (2 - 1)) / 4)

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