CaDMiuM
CaDMiuM or SaMBa
Bidding with a 54-fit in a major. Copyright 2010 by Bridge World Magazine Inc.
The Jacoby-2NT, described by Marty Bergen, is a good method to distinguish between 8 and 9 card fits. Nevertheless, it has its limitations. In the following article I describe a method in which mini-splinters and other gadgets are included. This method is clearly an improvement to the Jacoby 2NT and recommended for competitive players.
The purpose of this convention is to investigate if a game or slam is possible without disclosing too much information.
The player with the balanced hand will be the asker and the other player will be the responder. Then, the asker will know if there are wasted values opposite a void or a singleton. This important principle is already discussed this year in TBW.
The responder can tell now accurately the strength of his hand in 3 or 4 ranges, if there is a singleton or a void and if there are controls in the other suits. Ofcourse below game-level!
The Jacoby-2NT and (mini)-splinters are combined in such a way that bidding the short suit it self is avoided most of the time. The reason for this is to avoid that the opponents can double for the lead or for finding a cheap safe. Some new? gadgets like CaDMiuM-splinters and Conditional RKB are added. For this reason the convention is called CaDMiuM (in Dutch SaMBa).
After an opening of 1♠ all subsequent bids will be 1 step higher than after an opening of 1♥.
So 1♥ - 3♣ has the same meaning as1♠ - 3♦. For that reason in this article I will mostly discuss only the opening of 1♥.
A take-out double after the major opening can be neglected. When opponents double a response, an agreement that a pass promises a stopper or control seems usefull. After a redouble bidding continues without any disadvantage. If the other opponent makes a bid after that double you could agree steps in a way like Dopi-Ropi.
When a number of points is mentioned this should be read as an indication. You can add a point for an extra trump and deduct a point for a bad doubleton e.g. Qx, Jx or QJ and bare honors.
The basic scedule:
1♥ – 2♠ = ♣/♦-splinter 7-10 or 13+, or (semi)balanced limit-raise // 1♠ – 2NT = same
1♥ – 2NT = GF 13+, balanced, 4+card support. 1♠ – 3♣ = same
1♥ – 3♣ = Bergen-raise, 7-10 (semi)bal., or ♠-splinter 13+ // 1♠ – 3♦ = same
1♥ – 3♦ = spade splinter 7-12 1♠ – 3♥ = same
1♥ – 3♥ = 3-6 4+ crd fit and so on
1♥ – 3♠ = 10-12, singleton ♣ or ♦, 6 loosers //
1♥ – 3NT = 10-12, void in ♣ **
1♥ – 4♣ = 10-12, void in ♦ **
1♥ – 4♦ = 10-12, void in ♠ **
1♥ – 4♥ = preëmptive.
The symbol // means that the next bid is a relay after which step-responses are used. Most of the time the relay asks which suit of the responder is the singleton or void.
If 3 steps are available to responder below game-level, the first step means ♣ is the short suit. The second step promises short ♦ and the third step promises a short major.
Whith 4 steps available, which will often happen when opener is the responder, we play CaDMiuM-splinters which means:
The first step says: Club shortness.
The second step: Diamonds shortness.
The third step: Major shortness with ♣-control.
The fourth step Major shortness without ♣-control.
In the scedules below, this is noted as CDM and CDMM (CaDMiuM).
If only 3 steps are available and the short suit must be bid naturally, the method of “overshorts” can be used to prevent this, as earlier described in this magazine. Here we will not do so.
When a number of points is mentioned this should be read as an indication. You can add a point for an extra trump and deduct a point for a bad doubleton e.g. Qx, Jx or QJ and bare honors.
The Dutch name of this convention is SaMBa because of the first steps in the the basic scedule:
1♥ – 2♠ = Splinter in a minor or semi-balanced limit-raise
1♥ – 2NT = Mancheforcing, (gameforcing) 13+, balanced, 4+card support.
1♥ – 3♣ = Bergen-raise, 7-10 (semi)balanced, or ♠-splinter 13+ //
(Formerly the name was SaMBaL because then the 4th step promised the limit-raise)
Splinter-bids ♣/♦ by responder with 8-10, 10-12, or 13+ HCP, or a (semi)balanced limit-raise.
1♥ – 2♠ 1♥ – 2♠ 1♠ – 2NT
2NT – 3♣/♦ = (7)8-10 mini-splinter CD 2NT – 3♠ = 16+ 3♣ – 3NT = 16+
– 3♥ = (semi)balanced limit-raise 3NT à 4♣ = singleton ♣ ** 4♣ – 4♦ = singleton ♣
– 3♠ = 16+, short ♣/♦ // 4♦ = singleton ♦ ** 4♥ = singleton ♦
– 3NT = 13-15, singleton ♣ 4♥ = void in ♣ ** 4♠ = void in ♣
– 4♣ = 13-15, singleton ♦ ** 4♠ = void in ♦ !! 4NT = void in ♦ !! and EKB-diamonds
– 4♦ = 13-15, void in ♣ ** 5m = EKB 5m = EKB
– 4♥ = 13-15, void in ♦ **
– 5m = EKB
1♥ – 3♠ (10-12) 1♥ – 2♠
3NT – 4♣ = singleton ♣ ** C 2NT– 3♥
– 4♦ = singleton ♦, + ♣-control D ** 3♠ = waitingbid, asking for control-bidding
– 4♥ = singleton ♦, no ♣-control D ** 3NT/4m = void in ♣/♦/♠ CDM
1♥ – 2♠ 1♥ – 2♠
3♣ = 16+ (serious), any void // CaDMiuM 3♥ – 3♠ //
3♦ = 13-15, any void // CaDMiuM 3NT= singleton C
3♥ = 10-12, a singleton is possible // 4♣ = singleton D **
3♠ = 10-12, any void, no controls in side-suits! // 4♦ = singleton M **
3NT/4♣/4♦/4♥ = 10-12, void CaDMiuM ** 4♥ = balanced
All 10-12 singleton-splinters guarantee at least one control in a side-suit. Without that control a Bergen-raise like 1♥ – 3♦ or 1♠ – 3♥ is made.
Conditional RKB (C-RKB)
In some situations, after a bid of 4 in a minor, an asking-bid can be made with 4 in the not-agreed major, if the responder has an unbalanced hand. This bid is RKB on the condition that responder has a control in the fourth suit. Without the required control responder signs off with the cheapest bid. I call this “Conditional RKB”. In the scheme, where there’s the possibility to use Conditional RKB, this is noted as **.
1♥ – 2♠ 1♥ – 2♠
2NT – 3♠ 4♦/♥
3NT – 4♦ = singleton♦ + ♣-control.
After this 4♠ is C-RKB if responder has ♠-control. After this 4♠ = C-RKB if responder has ♦-control. (opener has become the responder!)
Balanced hands, 13+ HCP:
1♥ – 2NT = balanced, 13+ HCP 1♥ – 2NT
3♣ = any singleton, 13+ // 3♠ – Now you can choose between control-
3♦ = any void, 13+ // bids and telling just the number of
3♥ = minimum 10-12, singleton possible // controls. 3NT can be agreed as 16+.
3♠ = maximum = 13+ balanced Don’t forget to describe it after 1♠!
3NT/4x = 10-12, void CaDMiuM **
1♥ – 2NT 1♥ – 2NT 1♥ – 2NT
3♣ – 3♦ // 3♦ – 3♥ // 3♥ – 3♠
3♥ = 16+ (serious) -> 3♠ // CaDMiuM ** 3♠ = 16+ à 3NT // à CDM ** 3NT = singleton C **
3♠/NT/4m =13-15, CaDMiuM ** 3NT/4m/4♥ = 13-15, CaDMiuM ** 4♣ = singleton D **
4♦ = singleton M **
4♥ = balanced.
Bergen Raises Extended, balanced 7-10 HCP, or a splinter-bid ♠ with 13+ HCP:
1♥ – 3♣ 1♥ –3♣ 1♥ – 3♣
3♦//– 3♥ = 7-8, (semi)balanced 3♥ = sign off 3♦ – 3♠ = singleton ♠, slam-invite
3♠ = 16+ singleton ♠ 3♠ = void in ♣ 4♠ = EKB ♠ !!
3NT = 16+ void in ♠ 3NT=void in ♣ C 4NT= RKB!
4♣ = 13-15, singleton ♠ ** 4♣ =void in ♦ D
4♦ = 13-15, void in ♠ ** 4♦ = void in♠ M 1♥ – 3♣
4♥ = 9-10, (semi)balanced 4♥ = sign-off 4♥– 4♠ = EKB♠!!
4♠ = EKB 4♠ = EKB, 4NT = RKB
Playing 4♥ by opener here as CaDMiuM seems no good option. The disadvantage would be, that we would have to use the waiting-bid many times when we want to play 4♥ and nothing more.
Every time the opponents would have a chance to double for a lead or a safe.
Splinter-bids by responder with a singleton in the other major and 8-10 or 10-12 HCP
1♥ – 3♦ (♠-splinter 7-12)
3♥ = sign-off
3♠ = relay à 3NT = 7-9 HCP
4♣ = 10-12, ♣-control.
4♦ = 10-12, no ♣-control. (so there must be a diamond-control!)
Balanced hands, 13+ HCP with 53-fit:
If you like, you can also include bidding with a game-forcing 53-fit and a (semi)-balanced hand.in the basic schedule. (3343 or 3334 after 1♥-opening) Don’t forget to describe it after 1♠!
1♥ – 2NT
3♥/♠ à 3NT = 3343 or 3334 13+ After 1♥ – 2NT – 3♣/♦ you can better continue with 3♥.
Some examples:
AQxxx KJxx
-- xxx
KJxx Ax
Axxx KQJx
1♠ – 3♣
3♥ – 3♠ // 3♥ = any void.
4♥ – 4NT 4♥ = 13-15, void in ♥ (4th step!).
5♠ – 5NT 5NT = SKA: Specific King Ask.
6♦ – 7♠
-------------------------------------------------------------------------
AQxxx KTxxxx
Axxx xx
-- KJxx
Kxxx A
1♠ – 2NT 2NT because of the very good distribution!
3♥ – 3♠ 3♥ = 13-15 HCP, any void
4♣ – 4♦ 4♣ = void in ♦, 4♦ = waiting-bid.
4♥ – 4NT 4♥ = ♥-control
5♠ – 5NT 5NT = SKA
6♣ – 7♠
------------------------------------------------------------------------- AQxxx KJxx 1♠ – 3♣
xxxx AK
A xxxx
Axx QJx
3♦ – 3♥
4♣ – 4♥ 4♥ = C-RKB, here on condition that opener has a ♣-control.
5♣ – 5♦ 5♣ = 0 or 3 keycards + ♣ control and 5♦ = Queen-ask.
6♠
AQxxx Kxxx
xxx x
AKQx xxx
Kx Axxxx
1♠ – 2NT
3♣ – 3♠
3NT – 4♣ 3NT = waiting-bid, 4♣ = ♣-control. .
4♦ – 4♠ 4♠ denies ♥-control.
4NT – 5♥
6♠
----------------------------------------------------------------------------
AQxxx KTxxxx
Axxx xx
-- KJxx
Jxxx A
1♠ – 2NT
4♦ – 5♣ 4♦ = 10-12 HCP and void in ♦, 5♣ = ♣-control.
5♥ – 6♠
------------------------------------------------------------------------------
AQx Kxxxx
AQJxx Kxxx
AQx KJxx
Jx --
1♥ – 3NT
7♥!
-------------------------------------------------------------------------------
Kxxxx Axxxx
-- Qxx
Axxx KQx
Kxx QJ
1♠ – 3♣
4♥ – 4NT 4♥ = void in ♥ + ♣-control (CaDMiuM)
5♦ – 6♠
Ofcourse it is easy to reach 7S when responder has Ax of clubs.
Richard Ritmeijer and Wim Ooiman helped with some corrections.
Copyright 2010 by Bridge World Magazine Inc.
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