An explanation of ‘weak two-bids’
Originally, Charles Goren looked at a special class of hands holding seven cards in one suit, but lacking enough high card points (HCP) to open. Goren saw that this length was often wasted as discards. He also recognized that, as a trump suit, this length could be powerful in play. Since Goren used the entire two-level to indicate strong hands, he devised the pre-emptive three-level bid to show solid length in one suit even when lacking enough HCPs to open.
