[ahtan]

Hi, my partner and I recently encountered this. I’m wondering what is the generally agreed approach here.

In general, I’m looking for a suitable agreement for when your partner overcalls the opponent, you have an opening hand, no stops in opponents suit and no support for partners suit.

An example, let’s say that….

LHO opens the bidding 1C. My partner overcalls 1H. RHO passes.

Our agreement is that an overcall range is 8-16HCP. A change of suit at cheapest level is a non forcing bid.

The actual hand may vary, but the situation is opening hand, no support for partners suit and no stops in opponents suit. Let’s say I have an (say 13HCP) opening hand with a singleton H, 2 lousy clubs, 4 spades, and 6 diamonds. If I bid 2D, my partner may pass.

I tried this hand on the BBO bidding table, and the robot bid 2D as the advancer. But my problem is we may have a game with as little as 10HCP (LHO having most of the opponents strength). It seems to me changing the suit (non forcing) is not ideal. My partner says if I bid 3D (jump shifting) it may be too high, given the possibility of a 8hcp overcall. But I think it’s a risk not worth fussing over as it’s going to be uncommon (and 3D can make most of the time if passed).

[mike777]

Fwiw with your example hand .
Vul I would start with 2C.
NV much closer, probably 2D but close to 2C cuebid, very close.

[jillybean]

2C,cue bids are so useful. Partner can get out in 2H if he needs to.

[TylerE]

ahtan, on 2025-August-06, 17:52, said:

A change of suit at cheapest level is a non forcing bid.

All your problems ultimately stem from this unplayable agreement.

[smerriman]

TylerE, on 2025-August-06, 18:57, said:

All your problems ultimately stem from this unplayable agreement.

Unplayable is a bit extreme, given 2♦ being nonforcing is part of BWS and was still comfortably the majority opinion the last few threads I've seen on it on Bridge Winners..

[mw64ahw]

The Overcall Structure plays a mini lebensohl here so that 2♦ is forcimg and 1N asks partner to bid 2♣. Now you have a way to differentiate, but you lose the option to play in 1N, which on this occasion may be the optimal bid as you have the balance of points.
Here if 2♦ is forcing and I get a 2♥ response then I'm happy with passing.

[mikeh]

smerriman, on 2025-August-06, 19:42, said:

Unplayable is a bit extreme, given 2♦ being nonforcing is part of BWS and was still comfortably the majority opinion the last few threads I've seen on it on Bridge Winners..

While I personally prefer that a new suit by advancer is a one round force, I’d be quite happy playing it as non forcing. Do not confuse ‘non forcing’ with weak.

As I understand it, those experts who play it non forcing require it to be ‘constructive’. Partner is supposed to bid with anything much more than a minimum overcall.

As an example, it’s commonplace to overcall 1H, after 1m, with as little as AQJ9xx and out, if at mps and non vulnerable. So playing 1S as forcing goes long way to undoing any benefit from this overcall. xxx AQJ9x xxx xx, I’d happily pass 1S. Kxx AQJ9x xxx xx I’d happily bid 2S etc.

One way of reducing these issues is to adopt transfer advances of overcalls.

(1D) 1S (P) 2D shows hearts…unlimited….overcaller assumes it’s akin to a weak two and bids accordingly. Advancer can bid again with more…can jump, can cuebid, can bid notrump, can raise partners suit etc.

[Huibertus]

"A change of suit at cheapest level is a non forcing bid."

That is not playable. Make it forcing and your problem is solved.

[P_Marlowe]

Hi,

as stated by MiheH, nonforcing is playable and works.
We play xfer Advances, but not on the 1-level.

The main advantage of playing forcing is, that it helps to discover some 44 fits,
which can be missed. Playing nonfocing implies, that new suits show 5+.

The usual solution is to use the cue, as long as you have xx in p suit, playing at the
2 level wont be an issue. P will bid is suit, if he is broke.

With kind regards
Marlowe

[DavidKok]

There are a lot of styles here. Other than transfers/switch/other artificial approaches, I prefer for changes of suits to be forcing and show 5(+) cards. This way the cue shows a fit, while changes of suit deny a fit (almost always). Showing or denying the fit can be crucial information for partner to evaluate their hand strength, especially if advancer is strong so overcaller is likely weak and shapely.

About a year ago I had an entertaining misunderstanding with a pickup partner over this. I don't remember the exact hands, but I will give the approximate hands at the end of the auction with explanations:

(1♣)-1♦-(P)-2♣*;
(P)-2♠-(P)-3♥;
(P)-4♦-(P)-4♥;
(P)-4♠-(P)-5♣;
(P)-5♦-a.p.

My interpretation, having overcalled 1♦, was:
1♦: 5(+)♦, approximately 9(+) points (this overcall in particular should be a bit conservative as it doesn't take away space, doesn't show a major suit and it's a pickup partnership).
2♣: Invitational(+) with a diamond fit.
2♠: I have a non-minimum overcall with spades alongside the diamonds.
3♥: Probing for 3NT and indicating a weakness in clubs. Likely 4 hearts. Cannot be 5(+), as those hands bid 1♥ the first round.
4♦: Sorry partner, no club stopper here, not even half a stopper (3♠), and no extras to take the lead. This is not forcing.
4♥: Control bid for 6♦.
4♠: Control bid for 6♦.
5♣: Control bid for 6♦.
5♦: No extras.

My partner's interpretation was:
1♦: 5(+)♦, approximately 9(+) points (this overcall in particular should be a bit conservative as it doesn't take away space, doesn't show a major suit and it's a pickup partnership).
2♣: The only forcing bid. Promises points, doesn't promise shape.
2♠: Reverse, extra strength. Forcing to game.
3♥: Showing 5(+) hearts, typically 6(+).
4♦: Rats, we're past 3NT.
4♥: Well, at least we can stop in my long suit.
4♠: A wheel has come off. But maybe partner is so strong we make slam?
5♣: You decide.
5♦: To play(?).

I held approximately ♠ATxx, ♥x, ♦KQxxxx, ♣Jx, partner held ♠Qx, ♥AKJTxx, ♦x, ♣KQxx. 5♦ was not great.

The two morals of the story are: 1) play the same agreements your partner plays. This is more important than anything else. 2) I place tremendous value on bidding shape. Forcing changes of suit help with this by immediately clarifying degree of fit and leaving room to explore other strains - notice how I upgraded my hand to the 2♠ bid based on an assumed 9-card diamond fit and working honours, which is a ridiculous overbid if 2♣ does not promise support. Non-forcing changes of suit can involve more all-or-nothing decisions. Conversely, forcing bids can well get you a level too high, and also push weaker shape hands into 'pass'. "Get to the right strain at the wrong level". Transfers solve these problems and combine the strengths of both approaches with some new and interesting (smaller!) weaknesses.

[awm]

The approach I’ve always taken is that “non-forcing constructive” means overcaller cannot pass with a full opening bid (but could pass with less). These calls normally have a range of approximately 10-14 (with less pass or 1nt, with more force to game via jump or cuebid). It’s true that you might land in a 23-point 3nt occasionally (like overcaller 8 opposite advancer 15) but this is the price you pay for wide-range overcalls (I think it’s worth it overall).

On the original hand I’d bid 2♦ and expect partner not to pass with (m)any hands that make game.

I agree that transfer advances are generally a good treatment provided both partners will remember them. Amusingly I once played a strong team match where both tables had a transfer forget in the same hand! My teammates took it off their card after that, dunno about the opponents.

[mikeh]

Playing in a sectional this weekend. Picked up xx A1097xx K10x xx

(1D) 1S (P)

This is a classic example of the power of transfer advances. The hand is far too weak to bid 2H opposite an overcall but is perfect for 2D, showing hearts, unlimited but partner assumes a weak 2H type.

Try bidding this hand (partner held KJx) without transfers.