The Polish Club bidding system is based on an ambiguous 1C opening, limited one-level openings, 5 card majors and a Strong No Trump. The concept makes it possible to find partner's total strength on a lower level than in all-natural systems. In the Standard version, a 2C opening is Precision, 2D is Multi, and remaining two-level openings are weak Polish two-suiters. One of the key original features of the system is the concept...
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