One of the reasons I "retired" (for now, anyway) from big-time bridge in 2009 was that it bothered me if I made mistakes. I was very disappointed to get a hand wrong, especially since I was a paid professional.
In retrospect, my reasoning wasn't too smart. Everyone makes mistakes, yes. But, as a commentator/writer/observer, I am shocked at the number of egregious errors the supposedly "top" players make. The number of clear errors in the 2011 Grand National Team
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