Here we look at when to raise responder's suit on 3-card support. And then what we do after that -- the trump asking bid, sometimes called Spiral.
(523) NT Auctions: Puppet Stayman and 5-Card Stayman
(522) NT Auctions: 2S Size Ask Response
(520) NT Auctions: Opponents' Doubles of Our Stayman and Transfers
(517) NT Auctions: 3S Minor Suit Slam Try After a 2NT Opening Bid
(503) Middle of the Hand Defense: Surround Plays and Power Shifts
(495) Advanced Card Play: Smother Play
(494) Advanced Card Play: Endplays
(484) Competitive Bidding: Leaping Michaels
(483) Competitive Bidding: Competing Over 2-Level Preempts - Lebensohl
(477) Defensive Carding: More Suit Preference
(475) Defensive Carding: Smith Echo (Reverse)
Against a NT contract, when the opponents win the first trick and attack another suit they are often leading their best suit. In this case, we have an opportunity to communicate with partner. Smith Echo is an agreement that makes use of this situation to tell partner if the opening lead was good or not.