Editing Law of total tricks (section)

===Consequences===
There are a number of bridge conventions that take advantage of this principle. For example, [[Bergen raises]] following an opening bid of one of a major (using a 5-card major system):

* 3 of the major = 4-card support and 0-6 HCP
* 3C = 4-card support and 7-9 points
* 3D = 4-card support and 10-12 HCP

In 2002, [[Anders Wirgren]] called the accuracy of the "law" into question, saying it works on only 35-40% of deals. However, Larry Cohen remains convinced it is a useful guideline, especially when adjustments are used properly. Mendelson (1998) finds that it is "accurate to within one trick on the vast majority of hands"