steve2005, on 2017-November-09, 06:31, said:
if there was no double 3♠ is bid.
After double should be showing extras. 3♠ is defined as 11-21. How can you have constructive bidding when you cant show extra values?
Most of GIB bid descriptions after opening bids is 11-21 no matter how the auction goes. You can't have constructive auctions with GIB in many sequences, so you have to guess.
I disagree that 3
♠ shows extras, or at least extra HCP, in this auction. Obviously you aren't going to play in 3
♥X so passing with this hand is a wasted bid. This hand is much better than a minimum hand despite only 12 HCP. 5 diamonds instead of possibly 3, a singleton heart instead of a doubleton or worse. 5
♦ looks like it might be a good contract with this hand opposite the 3
♥ cuebid.