Books by Krzysztof Jassem

The motto of the Polish Club 2020 Expert system is: ''Bid aggressively with an offensive hand, keep quiet with a defensive hand.'' Non-vulnerable one-level light openings and responses are introduced here. But the main merit of the Polish Club, i.e. to ''keep an eye on the total strength of the bidders'', is still preserved.In comparison to other versions of Polish Club (including Polish Club 2020 Standard), the meaning of the 2C opening has been changed. The Precision approach has been dropped, and replaced by the major two-suiter. This treatment, added to weak two-suited openings, makes the system''s two-level openings very aggressive. And this brings IMPs and matchpoints!The spectrum of conventions in uncontested and competitive auctions is richer than in any other version of the Polish Club system. Some novel ideas (such as Cheap Transfer) are universal enough to be applied in any bidding system.

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 of the artificial reverse ("odwrotka" in Polish), which occurs in the sequence: 1C - 1H / 1S - 2D - ? The convention lets players quickly find the fit in the major and determine whether the hands are worth slam investigation.The latest version of the system, Polish Club 2020, has been devised on a questionnaire among potential users of the system. It adapts most popular treatments used in various contemporary bidding systems.A 1D opening is now almost always 5-carded, and the two-level opening bids are more aggressive than in earlier versions. Introducing modern conventions to uncontested and competitive auctions makes the system popular among expert players.

An updated version of the author's 2005 guide to the Polish Club 'one club opening' style of playing bridge.