In honor of his return, i will redescribe this transfer opening preempts (2NT to 3D) using simple rules to describe the "strong version" of the hands.
These transfers show then next higher suit and "weak" hand or a STRONG TWO SUITER (4 losers or less, 5-5 or better) EXCLUDING the next higher suit and INCLUDING the suit opened (2NT shows "hearts" when strong). Since the strong version is fairly rare (about 1/3 as frequent as the weak version) the subsequent bidding rules must be easy to remember and must be effective or it is not worth the effort.
Here are the simple rules that make this very playable (in this post, only partner completing the transfer will be discussed, and no interference... similar rules cover the other auctions, and can be discussed if anyone is interested).
RULE NUMBER ONE: Opener's rebid with all weak hands is pass, with strong hand he shows his two suits and his number of losers. To show two suiter with spades, rebid SPADES or the opened suit (remember 2NT shows hearts when strong). Each higher level of opener's rebid shows fewer and fewer number of losers (4 is maximum number), and in most cases, with 3 losers or less the need or lack of need for a cover for a loser in the lowest side suit. All rebids that allow responder to pick between BOTH openers suits at the same level show the mininum number of losers, a bid that forces partner to go to the next level shows one less loser, and need for the cover in the lower side suit.
So the cheapest rebid that shows specific two suiters shows four losers, the next cheapest bid that shows the same specific two suiters shows three losers, and most often the need or lack of need for a cover in the lowest side suit. These can all be worked out at the table in a matter of seconds, so no memorization needed. With major two suiters, after 3H rebid (4 loser), then 3S/4H shows 3 losers, 4S/5H (2 losers), 5S/6H (1 loser). Since two suiters without spades have three possible rebids, these show need for King, then ACE then no-cover in the lowest ranking side suit.
RULE NUMBER TWO: After responder hears the opening two suiter, if he can place the contract (part-score, game, slam or grand slam) by counting sure covers and having no "maybe" covers, he signs off in one or the other of partners suits.
RULE NUMBER THREE: If responder is considering slam (or grand slam) he can investigate slam by a combination of denial cue-bidding (side suits below 4NT) and positive cue-bidding (4NT and side suits above 4NT) (note 3NT to play). Each of these are up the line. So if responder skips a denied suit, it promises a "potential cover" in that suit. (5NT by responder is always bid your better/longer suit == even late in auction). A jump to 4NT when 3S is available as denial cue-bid shows King of spades and ACE of lowest side suit. A bid of 4S when 3S is available as a denial cue-bid shows King in lowest suit, and Ace or King in spades.
RULE NUMBER FOUR: Opener tries to signoff by bidding the cheapest anchor suit if a denial cue bid shows two losers in a suit or if the opener has no use for a cover in the other suit.
RULE NUMBER FIVE: If opener does not try to signoff, he has several options. The first is if only the ACE in the other non-anchor suit is useful (then he bids the cheapest step response not in an anchor suit). Responder must SIGNOFF in game or slam if he is missing the ACE in response to such an inquiry. Or if any cover in the non-anchor is working, opener shows the presences of absenses of one or more anchor queens as follows. With both queens, he rebids in the most expensive anchor suit. If he is missing both queens, he has three rebids possible (four with both majors): he rebids 6 of the cheaper anchor suit if missing ace in the denial suit. If he has the ACE in the denial suit, and missing both queens, he rebids 5NT, or with the ACE in the denial suit, he rebids 6 of a suit below the cheapest anchor with missing both queens but six or more cards in the cheaper anchor (with both majors, 6C shows 6+h, 6d 6+S). For rules if missing just one queen, see rule SIX.
RULE NUMBER SIX: Over a denial bid or otherwise, missing one queen, openers choice depends upon available room. If there is room below five of the cheapest anchor to show the ACE ask (the cheapest non-anchor bid), and two more possible non-anchor suit bids, the cheapest bid shows missing queen in lowest suit, the more expensive shows missing queen in the higher. If only one slot exist, bidding it shows a missing queen, but does not identify the suit. If no room exist below five of the cheapest, then show missing queen by bidding above it. If two slots above exist, use lower shows missing lower queen, higher shows missing higher.
RULE NUMBER SEVEN: If responder does not accept the signoff his cheapest rebid ask for missing queens. Anytime after opener has shown missing queens, responder not signing off ask if a distributional king is of use. A distributional king is not a real king or singleton, but rather a combination of long in one of openers two suits, short in the other and the side suit so that all the side suit can be thrown away, and then openers losers in that suit ruffed. If you make distributional king ask in a suit you have shown honor in, you are asking for king if you hold ace, you are asking for usefulness of the "queen" if you have the king (and partner didn't ask for ACE).
Here are a few example hands.
3S = rule 1 cheapest rebid showing spades and diamond (suit opened), 4 losers
4H = rule 3, thinking slam so denial cue-bid at four level, 4H denies heart, shows club control (since bypassed).
5H = rule 6, 4NT would ask for club ACE, there is no "free room" to show missing queen below 5 of the cheaper suit. Opener can show missing queen in clubs by 5D and in hearts by 5S.
6D = rule seven, asking if distributional king of diamonds is (now must be distributional queen) is useful.. I know 3 of your 4 losers are: Spade AQ, something in diamonds. If you are 5-0-3-5 you can ruff ♦ in my hand
7C = third round in diamonds is WONDERFUL, pick suit
7S = our suit
West North East South
Pass Pass Pass 3♣
Pass 3♦ Pass 3♠
Pass 4♥ Pass 5♥
Pass 6♦ Pass 7♣
Pass 7♠ Pass Pass
Pass
4S = rule 1, force partner to 5H if he likes hearts better, so one less loser than 4H, and shows need for some diamond cover.
5H = rule 3 potential heart cover, no diamond cover. Heart might be king or ace, as 4NT is reserved here to ask if diamond king is useful cover (since opener has sure need for diamond, but might be ace or king needed).
5NT = ask if ACE is of hearts (rule 5)
7C = ends auction. Club Queen and heart ACE covers two losers
West North East South
Pass Pass Pass 3♣
Pass 3♦ Pass 3♠
Pass 4♥ Pass 5♥
Pass 6♦ Pass 7♣
Pass 7♠ Pass Pass
Pass
4C = Rule 1, black two suiter, 3 loser, no need for diamond cover
4H = Rule 3, denial cue-bid, no heart cover, possible other covers for slam (club queen ruff for one potential cover)
5N = Rule 5 missing both queens and with ACE in denial suit, jump to 5NT
7S = wow.. your three losers are two black queens and spade King. Grand might need hook or drop in spades, but this rates to have good play. If you like you can stop in six you have a lot of info on which to make your decison.
Welcome back Misho!!!
West North East South
Pass Pass Pass 3♣
Pass 3♦ Pass 3♠
Pass 4♥ Pass 5♥
Pass 6♦ Pass 7♣
Pass 7♠ Pass Pass
Pass