This is the web site for the kindle book about contract bridge bidding systems.
The Precision Club System is one of the world's most popular and successful bidding systems, particularly among experts.
This book turns Precision upside down, making the one diamond opener the strong hand and the one club the catch all bid. In doing so the system becomes even more powerful and precise.
There's also a myriad of new conventions and bidding principles that bring Precision into the 21st Century.
So why play a Mirror Diamond system rather than Precision Club? The main advantage of a strong diamond is that the one club opener has room for a negative 1♦ response leaving other responses to give a positive message. In Precision the 1♦ opener doesn't have this luxury meaning that you have to choose between responding on really weak hands or passing out the diamond opener that could be two card, neither of which is particularly pleasing.
So why play a Mirror Diamond rather than a 'natural' biding system like SAYC or Acol? The main advantage is that we limit our hands to narrow ranges and can tell whether we are in part-score, game or slam from responder's first bid. This often means we can sign-off at a lower level and make contracts when the opponents are going down. Also it means that when the hand belongs to us we can play for penalties and when it belongs to the opponents we can compete effectively. We always have a way for opener to show extra values from their rebid onwards. The narrow range means we can use invitational bids as game forces and explore a slam. 2NT for instance is normally a game force asking for more information.
The system is allowed under the American Contract Bridge League list of conventions and the English Bridge Union's Level 4 rules.
For full details of the bidding sequences, bidding theory and principles buy buy the kindle book from amazon - out soon!