Book excerpt: The 2/1 Game Force System is an improvement over the Standard American System that has been played by bridge players for years. The clear advantage of 2/1 is that it allows a partnership to know that game is possible with only a single bid by the responder. However, a significant disadvantage is that the opener may have between 12 and 21 high card points (HCP) when opening one of a suit, obviously a very wide range. To remedy this situation, one may employ the strong club system in contract or duplicate bridge know simply as Precision.