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2D JTB to H (or WALSH for 3-suiters, or FG 5+C/5+D, or SUPERCONFI)

2H JTB for S (2NT next=4+C/FG; 3C=4+D FG)

2S JTB for C or raise to 2NT (opener bids 2NT w/ minimum, 3C o/wise)

2NT JTB for D or weak 5+C/5+D (opener bids 3D with max for D INV, 3C o/wise)

3C Minors, 5+C/5+D, INV

3D CONFI T (BAL slam try, asks controls [3+] then Qxxx+ suits if controls OK)

3H SPL H, 3154 or 3145, FG; perhaps 31(63) with poor minor

3S SPL S, 1354 or 1345, FG; perhaps 13(63) with poor minor

3NT NAT (style: Stayman with most limited 4M333 4C Old-fashioned GERBER (0/4;1; 2; 3 aces)

4R Texas to 4R+1 (then 4M+1=RKCB1430; new suit (or 4NT=S over 4H)=void)

4S Quantitative NT raise, 6 clubs to 3/5 top honors

4NT Quantitative NT raise, 6 diamonds to 3/5 top honors

5m NAT gamble

RELATED SEQUENCES: 1NT 2C

2D 2H* Weak, both majors, invites correction 2S Invitational 5/6S

2NT Invitational (some 4-card M or 5H)

3C NAT/FG; 5+C/4M (opener bids values or regressive 3NT) 3D NAT/FG; 5+D/4M (opener bids values or regressive 3NT)

3H* 5+SM/4H/FG (SMOLEN); over 3S 4m=SPL; over 3NT 4m=FRAG+ 3S* 5+H/4S/FG (SMOLEN); over 4H/4m new=SPL; over 3NT 4m=FRAG+ 3NT Natural (at least one 4-card M)

4m* 5+H/5+S/SPLm slam try

4M* 7411 or 6511 (short m's, long M bid), NF slam try 4NT Quantitative with 5/4 majors, at least 3 honors in minors

1NT 2C

2H 2S Invitational with 4S or 5S (UNBAL), or weak w/ 4S/5+D, or weak 4=1=4=4 scramble 2NT* Invitational with 5S BAL hand (like 1NT-2H*; 2S-2NT playing straight transfers) 3C NAT/FG; 5+C/4S (opener bids 3S with 4S; 3D for C; 3H flawed; 3NT real) 3D NAT/FG; 5+D/4S (opener bids 3S with 4S; 3H for D or flawed; 3NT real)

3H Invitational

3S* Some SPL; Slam try agreeing H; (3NT asks SPL upwards/4H warns of weak trumps) 3NT Natural (guarantees 4S)

4m* FIT JUMP agreeing H (new suit next=SPL) 4H Signoff

4S* Kickback RKCB-1430-H

4NT/5m* EXCLUSION RKCB0314-H (4NT=S shortness)

5H 5422 or 4522 18-19 HCP with 3+ honors in the minors

NOTE: With 5422 or 4522 slam try we must be prepared to jump to 5H over a 2H reply to Stayman as the jump to 3S does not accommodate BAL slam tries [review structure above to confirm why this is so]. However, CONFIT is probably more appropriate and keeps us lower with too many missing controls. 1NT 2C

2H 2S

Pass 4S4H, non-maximum 3S 4S4H, true maximum

2NT 2/3S, non-maximum (responder’s 3C=4144, 3D=signoff; 3H=5S/3H INV; 3S=5S INV) 3C* 2/3S, maximum (responder’s 3D=signoff; 3H=5S/3H FG; 3S=5S FG; guess with 4144) 3D* 4S4H3D2C, non-minimum (lower doubleton)

3H* 4S4H2D3C, non-minimum (higher doubleton)

1NT 2C

2S 2NT Invitational with 4/5H 3m NAT/FG; 5+m/4H

3H* Slam try agreeing S (3S/3NT good/fair S both ask SPL; 4S weak trumps) 3S Invitational

3NT Natural (guarantees 4H)

4m/4H FIT JUMP agreeing S (new suit next=SPL) 5m/5H* Exclusion RKCB for S

4S Signoff 4NT RKCB for S

NOTE: As 3H* leaves lots of room, first step over opener’s 3S/3NT=No SPL, then SPL upwards

1NT 2D* Transfer to H; shows H or 4441 types or 5+/5+C FG or SUPER CONFIT 2H 2S* WALSH PUPPET to 2NT, denies normal heart type hands

2NT* FORCED

3C* 1444/4441, FG (Black SPL); 3D asks: 3H=4441/3S=1444

3D* 4144/4414, FG (Red SPL); 3H asks: 3S=4414/3NT or higher=4144 3H* 5+C/5+D SPL H, FG.

3S* 5+C/5+D SPL S, FG.

1NT 2D*

2S* The only way to break a heart transfer (4/5H maximum) 2NT* Artificial, guarantees real H (next=NAT slam try)

3C* 1444/4441, FG (Black SPL); 3D asks: 3H=4441/3S=1444

3D* 4144/4414, FG (Red SPL); 3H asks: 3S=4414/3NT or higher=4144 3H* 5+C/5+D SPL H, FG.

3S* 5+C/5+D SPL S, FG.

3NT* SUPER CONFI (BAL 7-try, F6NT, asks controls (3+) then any 4-card suit 4m* SPL slam try, long H

4H* SPL slam try with short S, long H (NF) 4S* Kickback RKCB1430-H

4NT/5m* EXCLUSION RKCB0314-H

1NT 2D*

2H 2NT* 5+H/4+C (double transfer); FG 3C* 5+H/4+D (double transfer); FG

3D* 6+H; INV or slam try/game choice with moderate suit (not 3/5 top cards) 3H* 6+H/FG; slam try/game choice with good suit (3/5 top cards)

3NT 5H/game choice 3S/4m * 6+H; SPL slam try 4H* 6+H; mild BAL slam try

4S/5m* EXCLUSION RKCB0314-H [for straight RKCB use Texas, then 4M+1] 4NT 6H322 sound quantitative slam try with good suit (3/5 top cards)

1NT 2D*

2H 2NT* 5+H/4+C

3C 4+C

3H 3+H

3D 3C/2H; D values with S concern for notrump 3S 3C/2H; S values with D concern for notrump 3NT Real re stoppers

4C 4+C/3+H, slam-suitable double fit 4D 4+C, D concentration, slam-suitable

4H 4H, good fit with C but not 4C, no side ace 4S 4+C, S concentration, slam-suitable

4NT Something like: Axx Kx Axx Q109xx

1NT 2D*

2H 3C* 5+H/4+D

3D 4+D

3H 3+H

3S 3D/2H but a flaw (unknown) for notrump 3NT Real re stoppers

4C 4+D, C concentration, slam-suitable 4D 4+D/3+H, slam-suitable double fit

1NT 2H* Transfer for S

2S 2NT* 5+S/4+C (double transfer); FG

3C* 5+S/4+D (double transfer); FG

3D* 5+S/5+H; at least invitational (4m/5m next=SPL slam try)

3H* 6+S; INV or slam try/game choice with moderate suit (not 3/5 top cards) 3S* 6+S/FG; slam try/game choice with good suit (3/5 top cards)

3NT 5S/game choice 4m/4H * 6+S; SPL slam try 4S* 6+S; mild BAL slam try 5m/5H* Exclusion RKCB for S

4NT 6S322 sound quantitative slam try with good suit (3/5 top cards)

1NT 2H*

2S 2NT* 5+S/4+C

3C 4+C

3S 3+S

3D 3C/2S; D values with S concern for notrump 3H 3C/2S; H values with D concern for notrump 3NT Real re stoppers

4C 4+C/3+S, slam-suitable double fit 4D 4+C, D concentration, slam-suitable

4S 4S, good fit with C but not 4C, no side ace 4H 4+C, H concentration, slam-suitable

4NT Something like: Kx Axx Axx Q109xx

1NT 2H*

2S 3C* 5+S/4+D

3D 4+D

3S 3+S

3H 3D/2S but a flaw (unknown) for notrump 3NT Real re stoppers

4C 4+D, C concentration, slam-suitable 4D 4+D/3+S, slam-suitable double fit

4S 4S, good fit with D but not 4D, no side ace 4H 4+D, H concentration, slam-suitable

4NT Something like: Kx Axx Q10xxx Axx

1NT 2S* Raise to 2NT or transfer for clubs (no major unless weak) 2NT Not a maximum notrump

1NT 2S*

2NT Pass The balanced invitation 3C The end 3D NAT/FG (6/4+) 3M* 6+C, SPL M; FG 3NT* 6+C, SPL D; NF 4C* RKCB1430-C 4D* 6+C, SPL D, stronger than 3NT 4M* Exclusion RKCB for C

4NT 6C, sound quantitative but suit not as good as 3/5 top cards 5C Raise one level for each of the ace or king of trumps

5D* EXCLUSION RKCB0314-C

5H** GSF for C (cheapest weakest replies) 5NT Choice between 6C and 6NT

1NT 2S* Transfer for C (no major unless weak) 3C* Pass The end

3D NAT/FG (6/4+) 3M* 6+C, SPL M; FG

3NT Necessary with original raise to 2NT now that opener has a maximum 4C* RKCB1430-C

4D* 6+C, SPL D, enough to go past 3NT 4M* EXCLUSION RKCB0314-C

4NT 6C, sound quantitative but suit not as good as 3/5 top cards 5C Raise one level for each of the ace or king of trumps

5D* Exclusion RKCB for C

5H** GSF for C (cheapest weakest replies) 5NT Choice between 6C and 6NT

Thus, with one-suited club invitation, must be prepared to convert 3C to 3NT although opener’s maximum may not include the ideal club holding.

1NT 2NT* Transfer for D or weak 5+C/5+D (no major unless weak with D)

3C* “I would pass an invitational 3D” (now responder can pass with weak 5+C/5+D) 3D* Good for game opposite one-suited diamond invitation

1NT 2NT*

3C* Pass The end (weak 5+C/5+D) 3D The end (weak D one-suiter) 3M* 6+D, SPL M; FG

3NT* 6+D, SPL C; NF 4C NAT/FG (6/4+) 4D* RKCB1430-D

4M* EXCLUSION RKCB0314-D

4NT 6C, sound quantitative but suit not as good as 3/5 top cards 5C* 6+D, SPL C, stronger than 3NT

5D Raise one level for each of the ace or king of trumps 5H** EXCLUSION RKCB0314 (club shortage) for D

1NT 2NT*

3D Pass The end

3M* 6+D, SPL M; FG

3NT* 6+D, SPL C; NF [[NB: can’t do this as responder could have any INV hand]] 4C NAT/FG (6/4+)

4D* RKCB for D

4M* EXCLUSION RKCB0314-D

4NT 6C, sound quantitative but suit not as good as 3/5 top cards 5C* 6+D, SPL C, stronger than 3NT

5D Raise one level for each of the ace or king of trumps 5H** Exclusion RKCB (club shortage) for D

5S** GSF for D (cheapest weakest replies) 5NT Choice between 6D and 6NT

1NT 3C 5+C/5+D, Invitational to game Pass Preference

3D Preference

3M* Game possible if responder is short in bid M With: AQx xxx Qxxx Axx

3H is a fair shot. Game is good opposite: xx x KJxxx KQxxx, and responder will bid it.

1NT 3D CONFIT: balanced slam try, asks for controls starting with 3; if 10+ combined controls are present, responder introduces his cheapest 4/5-card suit

headed by at least the queen. Opener does the same. The partnership is committed to slam if a fit is uncovered. If there are fewer than 10 combined controls, responder signs off in NT at his second turn. Typically, CONFIT user is not 4333.

1NT 3M Singleton M, 5/4 in the minors or 6/3 minors with a poor long suit, FG

4m om Longer in om: remember that opener may be 3/3 minors where M is a NT problem 4M/4OM Legitimate slam try with 5/6m; one of these may be used as RKC1430-m

4NT NAT slam try: singleton ace or king in M

Higher responses Show key cards if accepting a quantitative long-suit type invitation.

In Competition

IF THE OPPONENTS DOUBLE 1NT IN THE DIRECT POSITION:

There is a price to pay for opening with a bid as preemptive as 1NT with a hand as non-offensive (not inoffensive) as a 4333 12-count. Your side may be in trouble. There may be no way to escape a penalty, no matter how clever you (think you) are.

In re the notion of "pre-escaping," (before someone doubles) with certain atypical hands: some examples will elaborate on this theme . . .

(a) xxxx xxx xx xxxx Consider transferring to 2S or even to 2H. (b) xxx x xx Qxxxxxx Raise to 3NT, or consider a true psychic.

(c) xxxx xxxx xxxx x The routine action is Stayman, but you might go even farther by doing your system thing to show a strong 4441.

Or you might simply pass 1NT, a psychic of a different variety. You've been programmed to believe that it can be a good idea to get out of 1NT before the double comes. If you make this a religion, your

opponents will know that you have at least a fair hand when you pass 1NT. They will be more careful in reopening, and some of the penalties you were hoping to collect will not be forthcoming. It is well and good to try something cunning when you hold a hopeless hand, but sometimes the most effective thing that you can do is pass. You might catch both opponents with balanced minimum openings, and fourth hand may not wish to reopen with that sort of hand. Or reopener might hold a distributional hand and wish to make a start on his suits rather than double. Even if fourth hand can double 1NT, his partner might remove it. Once second hand has passed, the scenario is extremely fuzzy. I believe that you will do best to mix it up, particularly against strong opponents. Run to a suit, pass, or consider some sort of psychic adventure, but try not to become an "easy read."

If second hand doubles 1NT, things have changed. If you don't take some action with a weak hand, the final contract is likely to become 1NT doubled. Not that is essential to run. It isn't. Fourth hand may run and save your skin. Or 1NT doubled might be as good a spot as any. The defense may be difficult. Or opener might have a long suit and run himself, an action that is either wise or a violation of partnership, depending on what the agreements might be. Some top-level weak-notrump partnerships (Chip Martel- Lew Stansby until the last few years, for example) are content to use no complex escape mechanism. They run when they can do so sensibly, or they grope when can't. 1NT doubled is a contract that they play more often than most weak notrumpers.

We prefer to give up on playing 1NT doubled once second hand doubles for PENALTY or to show an UNSPECIFIED ONE-SUITER. We may play in 1NT REDOUBLED, but otherwise, the bidding will lead to a contract in another strain or at another level. We believe that there will invariably be a better contract than 1NT when our side is outgunned. We need plenty of bids to describe the various "escape" hands, and in order to do this squirming in an efficient manner, there is insufficient room to cater to a contract of 1NT doubled. If the opponents have erred in doubling 1NT, they should have to pay for the pleasure, and so 1NT redoubled (which merits the game bonus for its success) is a contract worth considering. Much of this is academic as someone invariably runs when 1NT redoubled would make. However, by offering to have opener attempt to make 1NT redoubled, responder is able to involve opener in future doubling ventures (following an enemy retreat), which must be advantageous to our side.

Direct Double

In document E.T.S. de Ingeniería Industrial, y de Telecomunicación (página 51-55)