System used by Sven-Åke Bjerregård - Tommy Gullberg - Anders Morath, Sweden SYSTEM SUMMARY... 5 RECENT (OR FAIRLY RECENT) CHANGES... - PDF

S T A M System used by Sven-Åke Bjerregård - Tommy Gullberg - Anders Morath, Sweden Table of Contents SYSTEM SUMMARY... 5 RECENT (OR FAIRLY RECENT) CHANGES... 6 FOR FUTURE CONSIDERATIONS (NOT PART OF THE

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S T A M System used by Sven-Åke Bjerregård - Tommy Gullberg - Anders Morath, Sweden Table of Contents SYSTEM SUMMARY... 5 RECENT (OR FAIRLY RECENT) CHANGES... 6 FOR FUTURE CONSIDERATIONS (NOT PART OF THE SYSTEM)... 6 GENERAL RULES AND METHODS... 7 General... 7 Uncontested auctions... 8 Contested auctions... 9 Lebensohl NT/5NT XY-NT Jacoby 2NT Slam instruments Splinter bids Control-showing bids (CTL) Last train Serious 3NT Roman Key-Card Blackwood (RKCB) NT GSF Jump raise or voluntary raise to 5M Slam in partner s first suit O P E N I N G Responses After After 1-1M After 1-1NT After 1-2m After After After 1-2NT After 1-3m After 1-3NT After 1-3M/4X Passed hand bidding STAM 1.0 Page 1 After intervention OPP DBL / bid 1X OPP bid 1NT/2X OPP bid 2NT OPP bid 3X OP s voluntary rebids RP s competetive rebids after having shown a suit / / O P E N I N G S Responses support Raises to 3-level M support M - 2M Raises to 3-level M - 2NT Other support-showing bids /1M - responses in NT /M - 1NT NT/3NT /1M - jump shift in M After jumps to 2M After /1M responses in a new suit Rebid style OP s trump support OP s rebids in NT OP s suit rebids Passed hand bidding After After 1M Other After intervention Trump support Without trump support NT O P E N I N G Responses Continuation After 1NT - 2 ; After 1NT - 2M Passed hand modifications After intervention nd hand overcalls (or doubles ART) STAM 1.0 Page 2 2 nd hand doubles PEN th hand bids th hand reopens O P E N I N G Responses Continuation After After 2-2NT After After 2-3M Passed hand bidding After intervention O P E N I N G Responses After intervention / O P E N I N G S Responses After intervention NT M E T H O D S Responses Continuation NT M E T H O D S Responses / O P E N I N G S Responses After intervention / O P E N I N G S Responses After intervention NT O P E N I N G Responses STAM 1.0 Page 3 4 / O P E N I N G S / O P E N I N G S Responses NT O P E N I N G D O U B L E S Defensive bidding DBL after 1 st round General tendencies: PEN doubles T/O doubles Other doubles MAX Overcall Doubles Slam doubles Lead-directing doubles R E D O U B L E S After a lead-directing DBL of our NT bid STAM 1.0 Page 4 System summary 1 1 1M 1NT 11-13, BAL or 17+, any distribution , 1M 4-c 8+, 2m NF 8-12, 2M ART FG, 3m INV , 4+ suit, not BAL. 4-5 diamonds-clubs possible. Raises: 2 (10+), 3 (8-10), 3 (4-7) , 5+ suit. Raises: 2NT (FG), 3 (8-11, 4-c), 3 (10-12, 3-c), 3M (4-7, 4-c) , BAL, 5-c Major possible. 2 Stayman, 2 ART, 2M/2NT/3X INV, 4m TRF , 5+ suit. If only 5-c, 4-c M. 2 ART, 2M F1, 2NT NAT INV or support INV , 3-suiter with short diamonds ( or ). 2NT ART, 3 NAT FG. 2M 2NT 6-10, decent 6+ suit. New suit NAT F1, 2NT ART F1, 4m SPL , BAL, no 5-card Major. 3 ART, 3 Stayman, 3M NAT FG, 4m TRF 3X Reasonably constructive PRE. 3ns NAT F1, 4 lowest minor ART, 4M to play 3NT 4m 4NT Substitute for NAT 4m openings. In 4 th seat: To play, undefined. 4 P/C, 4 ART slam try, 4M to play Solid Major (or semi-solid with compensating Ace). Relay ART slam try, 4M to play 6-6 minors, about 3 losers STAM 1.0 Page 5 Recent (or fairly recent) changes Offense: 1. 1M (pass/dbl) 3NT shows a void in the suit immediately below M. 2. From agreed 3M, relay is forwardgoing, higher bids SPL or tricktaking suits. 3. Over 2M-2NT, OP s 3m is NAT, 3OM extras with any SPL. 4. No Romex, but relay is a general game-try. 5. After Jacoby, a jump to 4m shows a long suit, a jump to 4M shows good trumps. 6. After passing, single jumps in M are fit-showing, not SPL. Defense: 1. A CUE 2X/3X shows two specific suits only directly after their opening 1X. In all other cases, 2X shows highest + one, and a jump CUE 3X asks for a stopper. For future considerations (not part of the system) ; 1NT promising 4-c hearts, semibal with 1-2 spades. 2. Better methods after their two-suited overcalls. 3. Better methods after our 1NT/2NT overcalls, including TRF. 4. Simpler methods after our two-suited overcalls STAM 1.0 Page 6 GENERAL RULES AND METHODS General The following rules apply unless the detailed description says otherwise: 1) Undefined bids (or bids that could be interpreted in more than one way) are NAT rather than ART, NF rather than F, CTL rather than SPL. 2) Fast arrival. In FG situations, a jump or simple raise to game is slam-negative. However, 2NT/4m say nothing about slam potential, since they may be intended to leave room for other strains. A raise to 4m may be made in case partner wants to suggest another strain or take charge and does not create an obligation to follow up with CTL. Trump support Support for a major should be shown at the first opportunity. Support for a minor may be delayed - bidding a major or NT may be given precedence. 1) After a raise of an opening 1M to 2M (or TRF to 2M): Relay is a general game try. Partner bids trumps, suggests 3NT or shows values in a suit (1-2, 2-2NT = spade values). Others are long-suit game tries (2-2NT in spades). A jump shows a void. 2) After other raises to 2M, Bergen raises, a CUE raise: 2NT is NAT F1. New suit below 3M is a (semi)nat game try (unless only one suit remains). New suit above 3M is SPL. 3) After a raise or preference to 3M when we have an assured 8-card fit: When both hands are limited, 3NT is NAT, NF. This also applies when an unlimited hand repeats NT. Otherwise, relay is forward-going, either without a SPL or preferring to leave space for CTL. Higher bids are SPL, but rebidding a suit shows a source of tricks (at least KQJxx) and does not deny SPL. When hearts are trumps, 3NT means spades. After relay, new suit is CTL. (3NT shows spade CTL takes precedence over serious 3NT.) Specifically over 1R-1M;(2NT-3 ); 3M, the relay asks for SPL instead of CTL. OP shows SPL in the same way as he would show CTL STAM 1.0 Page 7 Stoppers Stoppers are shown when at least two suits remain unbid below 3NT, but a bid in the last unbid suit asks for a stopper. A CUE is always asking. When skipping another CUE, it shows a stopper in the suit skipped. When we lack a stopper, 4m is NF when either of us is limited. After DBL of an ART bid that may ask for a stopper (including 4 th suit, CUE and 1-2M): NT shows a full stopper (if ace, with something extra in the suit). Pass shows at most a semi-stopper. Partner s RDBL asks for a semi-stopper. RDBL shows the ace (without anything extra in the suit). A suit bid is NAT. A raise of the suit doubled shows SPL with extras. Uncontested auctions 1) 2NT is F1 (except by a passed hand) in these situations: By an unlimited RP after OP s 2-level rebid. By OP after RP s unlimited bid. 2) After a jump shift to 3M or a jump shift to 2M followed by a rebid 3M: With some support (xx or singleton honour): Raise with a minimum. With extras, make a CTL in a previous suit that is not a possible trump suit or bid a new suit (ART). Without support: A rebid in a long M is NAT, denying support. 3NT is F, neutral, denying support but not extras. Partner will make a CTL when his suit is good enough for slam opposite a singleton. 3) When we have bid to 3 without a jump shift and both majors are possible trump suits: 3NT/4NT are NAT, 4 a slam try in hearts, 4 a slam try in spades. 4) In FG auctions after 1 : RP s FG bid vs becomes F-4NT when OP shows 17+. RP s jump to 3NT shows support and MIN and is a suggestion to play. RP s jump preference to 3M/4m is NAT with a genuine interest in slam. 4 th suit is: NAT when OP bids it at his first opportunity NAT if 3m/4m when NT has already been bid. otherwise ART STAM 1.0 Page 8 Contested auctions 1) 2NT is F over partner s unlimited bid. 2) In a not FG situation, pass is weakest. A return to trumps does not promise extras but includes values good for offense. 3) In a FG situation, pass shows some interest. 4) After their RDBL of our T/O DBL, pass is for penalties when RDBL s partner has not promised any values, otherwise neutral. 5) CUE when both of us have already bid but trumps are not set: Primarily looking for (the best) game. 6) Forcing pass. Applies: When we are below the level unto which we have already established a force. When we have forced to game (but not just because we have bid game). By an unlimited hand when we have jumped to game (but NF by a limited hand). In forcing-pass situations above our game: DBL up through the 4-level shows values in their suit. DBL on the 5+ level shows a minimum with no interest in bidding on. Lebensohl Used after an unlimited T/O DBL of 2 / /, provided OPP have shown at most one suit and AD has only passed (or shown 0-7). 2NT is either a weak hand, intending to stop in a suit below X, or FG, usually with a stopper or a 5+ suit. Doubler bids 3 unless very strong. AD s rebid above 3X is now a 5-c suit, FG. Over 2 special rules apply: 2NT followed by 3 shows 4-c hearts but denies a stopper, 2NT followed by 3NT shows 4-c hearts with a stopper. 3ns (except CUE) is INV, NF. 3X is FG without a stopper. Over 2, it denies 4-c hearts. 3NT over 2 / is weaker than 2NT followed by 3NT STAM 1.0 Page 9 4NT/5NT is (in order of priority): a) RKCB (is also default - when other rules do not apply): b) Quantitative (with 5NT a very strong slam try but NF): as a raise or rebid of a natural NT bid. as a jump from 4 th suit on the 3-level. in GF auctions after 1 : from 3nm or from a preference/rebid of 3M. c) A general slam try: By a weak hand (i.e. one who has denied strength for 2-over-1 or responded 1 to 1 - a form of last train ). d) Offering a choice of trumps, primarily the two lowest suits (but could also be a slam try in partner s suit if higher-ranking): Over OPP s 3X/4X. Exception: When we could bid 3ns F. Over partner s non-jump 4X overcall/cue When we have not shown any suits. If partner has bid a suit higher than the offered alternatives and the 4NT-bidder returns to that suit, he has made a slam try. If a jump or a direct raise to 5M was available, the route via 4NT promises a control in their suit. XY-NT Used after 1-1M ; 1 /NT or 1-1 ; 1NT, but not after 1-1M; 1NT (not a BAL hand). 2 PUP-2, but strong 1 breaks TRF. Over 2, RP rebids: 2M INV, aiming only towards 4M 2OM INV 2NT INV with 5-c M 3ns INV, 5-5 3M INV, 6-c M, interest in 3NT 3NT suggestion with 5-c M 2 ART, FG. OP rebids NAT up-the-line. Strong 1 rebids 2 or 3m (5-5). 2M/OM NAT, no game interest 3m INV, longer minor 3 INV, 6-4 M (5-5 goes through 2 ) 3M INV, aiming only towards 4M STAM 1.0 Page 10 Jacoby 2NT Over 1M (opening or 2 nd hand overcall) and over 1-1M, 2NT is ART with support. Usually FG, but INV+ by a passed hand, or after OP s 1M and their overcall above 2, or after overcalling 1M, or after (1 ) 2 (2 /DBL). Responses: NT 4m 4OM 4M MIN, usually no void extras, no SPL extras, SPL extras, SPL extras, SPL OM 5-c suit, headed by HH or AJ10. (6-c suit after 1-1M.) void, extras. MIN, no SPL, but extra trump including HH or AJ10. (NAT vs a passed hand.) After 3 : 3 asks for SPL (but a general game try by a limited hand): ns SPL 3M no SPL, at least one extra trump, some interest 3NT no SPL, no extra trump, some interest 4M no SPL, no interest ns SPL 3M asks for CTL (but NF when 2NT was INV+) 3NT NAT, NF After 3 : 3M asks for CTL Others as above After 3M/NT: ns CTL. OP s direct rebid in his short suit shows a void. 3NT (except for above) is a serious slam try. OP s rebid after interference: Pass MIN, denies SPL in their last bid suit. 3M SPL in their last bid suit and close to MIN (but FG) CUE SPL with extras 3NT ART with extras. A general slam try when 2NT was FG, else just FG. 3/4ns NAT (FG) with a genuine two-suiter 4M (jump) Extras, no control in their suit, no slam interest. 4M (no jump) When 2NT was FG: SPL in their last bid suit, close to MIN When 2NT was INV+: Accept, no slam interest (3ns) Dbl PEN (4ns) Dbl General slam try When OP passes over intervention, RP s bid in a new suit is still SPL. He may also ask for SPL with 3, 3M (when F) or 3NT (when 3M would be NF). 3NT is NF when a lower SPL ask is available STAM 1.0 Page 11 Slam instruments Splinter bids SPL agrees trumps. They are usually below game and one level higher than the lowest NAT strong or F bid in the suit, i.e. a double jump, a jump reverse or a jump CUE. When both are limited, jumps from 2/3X are SPL. A jump to game in a new suit is NAT in the 1 st round, but SPL by a passed hand. a) When a raise is forcing, a jump in a new suit below game is SPL. When a raise to 3M is F, it may contain a SPL if minimum and not very good slam cards. Thus SPL promises extras or at least good slam cards. When a raise is NF, a jump in a new suit is CTL. b) Void SPL A double jump below game, a direct jump in OPP s suit or a CTL with an unnecessary extra jump. Control-showing bids (CTL) An active CTL is one that invites slam or shows interest when partner invites. When a minor is trumps, active CTLs should not be made by a hand that has shown 11+ hcp and lacks key-cards. A passive CTL is part of a CTL-showing sequence and must be made by a hand that has made an active CTL (unless partner has denied a control needed for slam). CTLs are made up-the-line regardless of type or rank. However, we avoid a shortness CTL in partner's 5+ suit the first time around, and a CTL in our own 5+ suit may be skipped if a CTL in the next suit seems more important. Otherwise, a CTL that bypasses a suit denies a control in that suit. A CTL in a suit where partner has denied a control promises 1 st round control if other CTLs below 5 trumps are available including Last train (see below). To bypass game shows substantial extras. A CTL opposite an unlimited partner just denies submin - a possible CTL is skipped only with submin (or a clear misfit after partner s SPL). If a CTL is doubled, RDBL (by either hand) shows interest with 1 st round control. Over the DBL, an immediate CTL tends to show help in the suit (no worry about the lead). Pass is just waiting for clarification STAM 1.0 Page 12 Last train In three situations, Last train may be used. When partner has made a SPL When partner has denied support When partner has denied a specific control. Here, the cheapest CTL below trumps does not guarantee a control in the suit bid merely a continued interest in slam. When we already are in a CTL-showing sequence and partner bypasses a suit, Last train is mandatory below the trump suit if you have the control partner is missing. This meaning takes precedence over a repeat of a SPL as void-showing. Serious 3NT When a major is trumps, we are at the 3-level and 4ns would be a CTL, 3NT is a serious slam try, and CTLs bypassing 3NT are weaker. Exception: When 3 is a relay, 3NT is not serious but shows a spade CTL. A CTL below 3NT says nothing about the degree of interest. Roman Key-Card Blackwood (RKCB) Usually trumps are already set or 4NT sets the suit last mentioned as trumps. However, after a jump shift, or after 1X-2m, 2X/2ns, RP's direct 4NT is RKCB setting his suit. Responses: 5 0/3, 5 1/4, 5 2/5 without trump Q, 5 2/5 with trump Q. Two extra trumps are always equivalent with the Q. With a void and 2 key-cards, RP may jump to 6 in his void, or 6 trumps when the void is higher. With a void and an odd number of key-cards, he may respond 5NT. (Unless the SPL is already identified, 6 asks - see below.) Void-showing jumps that preclude asking for the trump Q tend to include that value, or at least one extra trump. After 5m or a void-showing 6X, relay (outside trumps) asks about trumps. With nothing extra, RP bids the trump suit. With one extra card RP bids the next suit (bypassing trumps and NT if necessary). With Q or 2 extra cards he bids 5NT, a suit where he has extra values or jumps in trumps (denies extras). After 5X, 5 asks partner to bid 5NT, primarily to stop when two key-cards are missing, but a rebid of 6 trumps asks for one extra trump. If spades are trumps, 5 is NAT, but 6 asks for one extra trump. After 5NT, 6 asks if the void is in a minor (6 ) or a major (6 ). When spades are trumps, 6 shows a void in clubs, so 6 shows a void in diamonds STAM 1.0 Page 13 After the RKCB response, 5NT is a general GS try. Both players may bid outside values upthe-line. A CTL in a SPL suit may show values in a suit above trumps. If the asking hand wants help in a specific suit, he bids it (unless that would be trump ask or NAT). This asks RP to bid 7 with an undisclosed honour in the suit. With at most a doubleton but few extra tricks, RP tries to find a bid below trumps. 5NT is RKCB when we are at the 5-level without having checked key-cards. If OPP intervene, RP makes the same response as uncontested, if possible. If not, DBL shows an odd number of key-cards, pass shows an even number. If partner may be unable to tell how many key-cards DBL shows, RP may instead bid 5NT or slam with 3 or 5 key-cards. After all responses that do not show or deny the trump Q, relay still asks for it (see above). 5NT GSF A jump to 5NT asks about trumps. RP bids 7 with two top honours, 6 with A or K (relay asks for extra length), 6 with Q, 6 with one extra card. 6-level responses above trumps are dropped. Jump raise or voluntary raise to 5M When setting trumps, a jump raise to 5M asks about trump quality. Otherwise, a raise or a jump to 5M is a general invitation after CTL, usually with good trumps. When both a raise and a CTL would deny a specific control, 5M is the stronger bid. In a competitive auction, a jump raise or voluntary raise to 5M denies control in OPP s suit. When setting trumps it is a general invitation and does not deny control in OPP s suit. Slam in partner s first suit. Slam in partner s first suit is a suggestion to play, even if we have found a 5-3 M fit. Exception: after RKCB followed by 5NT or a trump queen ask STAM 1.0 Page 14 1 O P E N I N G Two-way with BAL. 5-c M possible if it is weak or the hand is MIN with notrump values. 17+, any distribution. Responses hcp. 1M 8+ hcp, 4+ suit, F1. Longer m possible. 1NT 8-11 hcp, BAL, no M. 2m 8-11(12) hcp, 5+ suit, no M. Denies values for 2 /3m. 2 FG, no M. 5+ clubs or BAL slam try. 2 FG, no M. 5+ diamonds or TRF to 2NT. 2NT hcp, BAL, no M. 3m about hcp, 6+suit. INV opposite M 4-7 hcp with a decent 7-card suit. 3NT (13)14-18 hcp, usually BAL, no M. 4m TRF to 4M. Good suit at most one loser. 4M 4-7 hcp, 7+ suit gambling. After 1-1 Weak OP rebids a (3)4-c M. He may pass with diamonds if bidding a 3-c M is unappetizing. Strong OP rebids NAT, but prefers 1M on a 4-c suit to 2m on a 5+ suit. Jumps are FG. 1-1 ; 1M 1M is NAT, NF, either weak (occasionally 3-c if OP does not want to pass 1 ) or strong (4-c usually only if UNBAL either 4441 or longer minor). RP may pass with 0-4 hcp. Otherwise: hcp, 4-c (0-3 hcp only with 5+ suit). F1 if OP is strong. 1NT 5-7 hcp, no 4-c support, usually no reasonable 5-c suit. Denies 4-c spades. 2ns 5-7 hcp, 5-c, denies 4-c spades. RP tends to prefer 1NT with 3-c support in M or with a weak 5-c suit. 2M 3-7 hcp, 4-c support. F1 if OP is strong. Jump in ns 5-7 hcp, good 6-c (on the 3-level, at least KQ). 2NT 5-c support, MAX. Jacoby module OP s 3 shows STAM 1.0 Page 15 Weak OP must pass on the next round (including over 1 ), except over ART 2NT. Strong OP rebids NAT, but with some special gadgets after RP s 1 /NT see below. Strong OP may also pass (except over 1 or a raise), so 2NT over 2ns suggests extras. OP s new suit is NF. 2 over 2 is unclear as to longest suit, but 3m promises 5-c suit. After 1-1 ; 1M - 1 /NT OP s 1NT is NAT with either 5-c hearts, BAL or SEMIBAL, or or similar (weak 5-c m). RP s 2 is Stayman OP bids 2 with 4-c hearts and 1-2 spades, 2 with 5-c hearts and 1-2 spades, 2 with 3-5 in the majors. RP s 2 / are sign-off, but 2 promises some values (as RP did not pass 1 ). OP s 2 is ART with 5-c M (may include 5332 with 3-c spade support). With support, RP bids 2M/3M/4M. Without support, RP bids 2 ART or higher NAT bids (2NT with 6-7). 2 may contain 5-4 in the majors. Over RP s 2, 2 is NAT NF, 2NT is a general strong bid and higher bids are strong with 5-5. (Strong means F if partner has 4-7.) OP s 2 is NAT canapé, and OP s 2M
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