[strong 1c]

I have never used support doubles but thinking I should. I For purposes of this question, I define a support double as: you have opened 1D, LHO has passed, Partner has bid 1M and RHO makes a natural overcall less than 2NT Some examples: 1D -(P) -1H -(1S)-? or 1D -(P) -1S -(2C)-? or 1H -(P) -1S -(2D -?

Using support doubles, A double shows 3 card support. If opener makes any bid besides pass or a raise, then he is denying 3 card Major support.

For us, if bidding went 1D -(P) -1H -(1S)- then opener's 2nd bid would be
1NT shows NT shape, a stop and denies 3 card support
2C would show 54 in the minors (possibly 6 diamonds and 4 clubs), denies 3 card support
2D would show long diamonds, denies 3 card support
2H shows 4 card support with NT shape
3H seems like a rare bid with support and 5332 shape
2S would be undefined - do you define it ?

Suppose, however, that you do have 3 card support. Now your choices are to either pass or double. I'm trying to figure out a 'rule' or guidelines where you should pass vs where you should double, recognizing that your partner may only have a 4- card suit and only 6 HCP.

Is the rule as simple as, I am willing to play 2 of your majors with a 7-card fit, even if you are at a minimum? (I can see that there may be times when Opener may want to do a trap pass even if he has 3 of partner's Major)

I definitely welcome any comments.

[mike777]

There is so much more to support doubles and options to choose from. You might look online or buy a book or pamphlet on them.

You are right in that you need to decide if they are virtually mandatory or not in your style. There is disagreement..

[strong 1c]

mike777, on 2026-October-10, 05:40, said:

There is so much more to support doubles and options to choose from. You might look online or buy a book or pamphlet on them.

You are right in that you need to decide if they are virtually mandatory or not in your style. There is disagreement..

Thanks! and yes, that is precisely the question I am looking to see comments on. I think the nuances and options you mention are likely talking about are on responders' rebids, and not so much on opener's choices which are pretty straight forward when he has 3 card support: He can either (trap) pass or double.

Putting a trap pass aside, can you give any insight beyond my thinking: double if willing to play 2M with 7-card fit? Do you play precision with support doubles?

SO far, the online stuff I see are written for people who play 2 over 1 or Standard American

[awm]

I normally play takeout doubles in these situations, so in addition to (normally) three card support, double shows 0-2 cards in overcaller’s suit and 3+ in the unbid suit (and in diamonds). This makes it much easier for responder to find our fit in cases where the 4-3 will not be best, and also makes sure we let the opponents play in their overcall suit when we have a lot of trumps.

Of course, this works better when we can rule out the diamond one suited hand (which opens 2♦ in my style) but I play this way even in a natural/better minor system. A big part of the advantage is simply knowing what’s forcing — a surprising number of support double players don’t seem to know whether a bid other than his major is even forcing by responder after the support double.

[strong 1c]

awm, on 2026-October-10, 07:58, said:

I normally play takeout doubles in these situations, so in addition to (normally) three card support, double shows 0-2 cards in overcaller’s suit and 3+ in the unbid suit (and in diamonds). This makes it much easier for responder to find our fit in cases where the 4-3 will not be best, and also makes sure we let the opponents play in their overcall suit when we have a lot of trumps.

Of course, this works better when we can rule out the diamond one suited hand (which opens 2♦ in my style) but I play this way even in a natural/better minor system. A big part of the advantage is simply knowing what’s forcing — a surprising number of support double players don’t seem to know whether a bid other than his major is even forcing by responder after the support double.

I probably have several questions I could and may ask, but start with my first 2 questions. When you open a (your) precision diamond, when would you pass if bidding went 1D -(P) -1H - (1S) and you hold 3 Hearts and my 2nd question is, if you make a non-heart bid did you just deny 3 hearts ?

[awm]

 strong 1c, on 2026-October-10, 09:31, said:

I probably have several questions I could and may ask, but start with my first 2 questions. When you open a (your) precision diamond, when would you pass if bidding went 1D -(P) -1H - (1S) and you hold 3 Hearts and my 2nd question is, if you make a non-heart bid did you just deny 3 hearts ?

I would pass if holding 3+♠. Bidding 2♣ denies three hearts by inference (since 9 cards in the minors + 3♥ means short spades). My 1♦ doesn’t include one suited diamonds so I don’t have to worry about this hand type. A 1nt rebid could include three hearts though (especially 4333).

[strong 1c]

awm, on 2026-October-10, 10:13, said:

I would pass if holding 3+♠. Bidding 2♣ denies three hearts by inference (since 9 cards in the minors + 3♥ means short spades). My 1♦ doesn’t include one suited diamonds so I don’t have to worry about this hand type. A 1nt rebid could include three hearts though (especially 4333).

Are the following statements true for you?

A. You will always double when you have a 3-card fragment with two exceptions: i) a trap pass where you think playing defense is a good option and ii) bidding 1NT, if available, may have a fragment.

B. Any natural bid you make denies a fragment.

C. With a fragment you never pass with the one exception noted in A.

D. A pass is allowed but it denies a fragment unless its a trap pass


D = C

[awm]

strong 1c, on 2026-October-10, 12:05, said:

Are the following statements true for you?

A. You will always double when you have a 3-card fragment with two exceptions: i) a trap pass where you think playing defense is a good option and ii) bidding 1NT, if available, may have a fragment.

B. Any natural bid you make denies a fragment.

C. With a fragment you never pass with the one exception noted in A.

D. A pass is allowed but it denies a fragment unless its a trap pass


D = C

A. No. I almost never have a trap pass. For example:

1♦ - Pass - 1♥ - 1♠:

♠T964
♥AQ2
♦KQ984
♣2

I would pass. If partner doubles, I will bid 2♥ (not pass).

♠J42
♥KQ9
♦A54
♣QT64

I would pass. I don't have a spade stopper but I have too many spades to double.

B. This is true in the context of the club system I actually play, but not necessarily always true:

♠Q42
♥JT2
♦AKJ983
♣3

I would bid 2♦, since double shows club length which I don't have. Pass doesn't appeal with this shape.

[DavidKok]

Here are some of my scattered thoughts on the topic, for what it's worth:

• Making support doubles mandatory with 3-card support is simplest. It can profit on defence and on lots of bid-on-versus-stop-here decisions. It also saves a lot of debates on which hand with 3-card support is good enough/too defensively oriented/has enough ruffing value/wants to be in 2M/whatever.
  
• I think takeout doubles are superior to support doubles, but this requires more detailed partnership discussions.
  
• Support doubles are stronger in limited opening systems compared to natural systems.
  
• Some of the hands you list, e.g. "1NT shows NT shape, a stop and denies 3 card support", can also just pass.
  
• Don't worry about getting too high with a minimum opposite a minimum. It's rare, and when it happens the opponents likely make something. Playing 2M in a 4-3 fit is not that bad at all.
  
• Worry about the continuations. Almost nobody actually knows what they are doing on these auctions. Which bids by responder are forcing after a support double, which are offers to play, how does opener further clarify the hand?
  
• You mention opener trap passing? That seems risky in a limited opening system.

[strong 1c]

DavidKok, on 2026-October-10, 13:37, said:

Here are some of my scattered thoughts on the topic, for what it's worth:

• Making support doubles mandatory with 3-card support is simplest. It can profit on defence and on lots of bid-on-versus-stop-here decisions. It also saves a lot of debates on which hand with 3-card support is good enough/too defensively oriented/has enough ruffing value/wants to be in 2M/whatever.
  
• I think takeout doubles are superior to support doubles, but this requires more detailed partnership discussions.
  
• Support doubles are stronger in limited opening systems compared to natural systems.
  
• Some of the hands you list, e.g. "1NT shows NT shape, a stop and denies 3 card support", can also just pass.
  
• Don't worry about getting too high with a minimum opposite a minimum. It's rare, and when it happens the opponents likely make something. Playing 2M in a 4-3 fit is not that bad at all.
  
• Worry about the continuations. Almost nobody actually knows what they are doing on these auctions. Which bids by responder are forcing after a support double, which are offers to play, how does opener further clarify the hand?
  
• You mention opener trap passing? That seems risky in a limited opening system.

Thanks David and Adam

yeah on trap pass...perhaps 1D -1H -(2C) where opener is 54 in minors, but I it seems remote; I agree

It seems like there may be two schools of thought. Either Support doubles are mandatory with a fragment or they are not. Both have appeal. (or I suppose maybe they are mandatory with well-defined exceptions) I may just try the easier approach and see how it plays out, adjust as necessary.

Continuations I'll next think about. With a weak hand, Responder can just retreat. If opponents make a 2-level bid over the double, Peter and I play transfer lebensohl when this occurs so we can invite, shows stops, bid game, etc. I have to think about 1D - (P) -1H -(2C) -then Double -(P) -and back to Responder . Probably cue bid is game force and all is invitational

Adam, when you do a SD, does that imply a point count ? ..eg. 13-15, or no

[awm]

When we are below two of responder’s suit it’s just shape. When above two of responder’s suit it shows extras, typically 14-15 in a strong club context.