[Joannecoop]

Hi there fellow bridge players.

In contract bridge, if the opposition opens one diamond and we don't ask what the one diamond means, is the opener's partner allowed to offer information about what the one diamond call means without us asking? In our situation, opener's partner said "That means at least four diamonds". I said she is not allowed to offer information unless we ask. An argument quickly ensued. I would appreciate it if someone could set us straight.

[jillybean]

The short answer, NO you should not be offering explanations of your partners call unless asked.
1D showing 4 does not require an alert or an announcement.


I'll leave the long answer to mycroft

[pescetom]

jillybean, on 2026-March-30, 09:35, said:

1D showing 4 does not require an alert or an announcement.

I'll leave the long answer to mycroft

The intermediate answer includes that in several jurisdictions, 1D showing 4+ does require an announcement
Perhaps not in ACBL.

In short, you should know and respect your regulations about alerts and announcements, in addition to the Laws of duplicate bridge which do not dictate such things.

[Zelandakh]

Alert regulations vary according to the regulating authority. In some jurisdictions, a player adding commentary like this would be UI and likely draw the ire of the TD: in others it is not only allowed but also required. You should also be careful in dressing down your opponents for some perceived breach of regulations. If this is indeed a RA where announcements are required, your actions might easily be interpreted as anti-social and result in a Zero Tolerance penalty. Rather than get in an argument over a regulation you yourself admit you do not actually know, why did you not call the TD and get an actual answer to your question? That is the point that I think you need to be set straight on more than anything else.

[mycroft]

In general:

• When playing face-to-face, all Alerts and explanations are made by the partner of the bidder.
  
• Alert what is Alertable (defined by your RA); do not explain without being asked.
  
• Announce what is Announceable (same deal); do not Announce an Alertable call (Alert instead) or a non-Alertable call (say nothing). Use the prescribed wording for your Announcements.
  
• When asked, a complete explanation of the call must be given (an Announcement is never "complete"; but usually is sufficient information that no ask is made). Specifically, I think everywhere, "the name of the convention is not sufficient explanation" (unless it is the specified Announcement, but see previous sentence).
  
• When partner's explanation differs from your hand, remember the following:
  • If partner's explanation is correct - you misbid - say nothing (but know that you must continue to bid as if partner had explained what you thought you were playing).
    
  • if partner's explanation is not correct, say nothing at the time (and try your best to not flinch). At the end of the auction, *if your side is declaring*, correct the explanation.
    
  • if your side is defending, you may not correct the explanation until the end of the hand, at which time you must. Please call the director in this case (if the opponents haven't already :-), as she is likely to be needed.
• Conversely, if *you* realize that you have misinformed (or failed to Alert/Announce as required) the opponents, call the director and correct the explanation.
  
• When playing with self-Alerts, such as on BBO, explain your own bids if they are Alertable/Announceable/just plain weird.
  
• When playing with screens, both partners Alert their screenmate, the bidder when they make their Alertable call, partner when the call is pushed through the screen.

As the others are saying, without knowing which RA you play under, we do not know if, *in this specific case*, an Announcement of 1♦ "minimum 4" is required. If it is not, no comment should be made unasked. If it is, then it was properly made.

In all cases, if you are concerned, call the Director and explain what happened. Do not lay blame, or get upset, or sound like you believe they're [-]ing; just state what happened, and maybe ask if there's an issue or if this was correct? And let the Director direct the conversation afterward. The Director Is Your Friend (but if the director *is* your friend, expect to be held to a high standard).

[jillybean]

pescetom, on 2026-March-30, 15:09, said:

The intermediate answer includes that in several jurisdictions, 1D showing 4+ does require an announcement
Perhaps not in ACBL.

In short, you should know and respect your regulations about alerts and announcements, in addition to the Laws of duplicate bridge which do not dictate such things.

What the heck do I know

[Joannecoop]

Interesting. I did not know what announcements were. I did a little bit of research and the requirement for announcements seems to be RA dependent. I am in South Africa so it would probably be the SABF (I will check though). Under SABF rules 1 diamond (meaning 4+ diamonds) is natural and does not require an announcement.

[Joannecoop]

 Zelandakh, on 2026-March-30, 16:04, said:

Alert regulations vary according to the regulating authority. In some jurisdictions, a player adding commentary like this would be UI and likely draw the ire of the TD: in others it is not only allowed but also required. You should also be careful in dressing down your opponents for some perceived breach of regulations. If this is indeed a RA where announcements are required, your actions might easily be interpreted as anti-social and result in a Zero Tolerance penalty. Rather than get in an argument over a regulation you yourself admit you do not actually know, why did you not call the TD and get an actual answer to your question? That is the point that I think you need to be set straight on more than anything else.

Point taken. Thank you!

[paulg]

Joannecoop, on 2026-March-30, 22:02, said:

Interesting. I did not know what announcements were. I did a little bit of research and the requirement for announcements seems to be RA dependent. I am in South Africa so it would probably be the SABF (I will check though). Under SABF rules 1 diamond (meaning 4+ diamonds) is natural and does not require an announcement.

It could be argued that your opponents made a technical mistake with the best of intentions.

It is clear in the SABF regulations that this opening bid does not fit into the categories of announcements required. However "any call which, by partnership agreement, contains information of which the opponents may not be aware must be alerted by the partner of the player making such a call and a full explanation given upon request by an opponent. This applies to natural as well as to artificial calls". If the partnership feel that the fact that 1♦ always promising four is information that you require, possibly because they were playing a short club, then they should have alerted the call: but it is understandable in an environment where announcements are used that they might announce rather than alert as they should.

In the UK, if someone did this then I would assume that they were trying to be helpful and would not be concerned.

[barmar]

paulg, on 2026-March-31, 03:09, said:

In the UK, if someone did this then I would assume that they were trying to be helpful and would not be concerned.

While it may be well intentioned, the problem is that it passes UI to their partner. The rules for alerting, announcing, and explaining are deliberate compromises between full disclosure and avoiding undesirable communication within a partnership.

This conflict is mostly avoided when playing with screens or playing online with self-alerts that partner doesn't see. There you can be pretty liberal with your explanations.

[mycroft]

I do agree with Paul - I wouldn't worry about this one. It's (meant to be) helpful, and it's not like it's something the opponents will forget.

The issue with preemptively informing the opponents is that it also informs their partner - if nothing else, "don't worry, we're still on the same page". Here, that's not something that partner will even dream of worrying about. This is the reason for Announcements - information that is explicitly "partnerships will never forget this"(*) that is also quick enough for "this is all the information you'll likely need".

The problem with doing it when it is not required, even to "be helpful", is that it is very easy to continue with "helping the opponents", even to auctions where it's *not* "certain partner will know we're on the same page". And there, it's UI (and kind of difficult UI to rule against, because "of course I remembered our system"). So, as a director, I would want to know this was happening, so that I could explain to them "thanks for aiming to help the opponents. But you're not supposed to do this, and I'd ask you to stop. If you think it's important for the opponents to know, you can either mention this before the round, or after the auction if you're declaring. Or [yes, Jillybean] make it clear on your convention card, so they can find it out."

But best is not to get into an argument. Admittedly snarky, but a "we didn't ask" should be the limit. If they object to that, "Director, please" is your response, not any argument - which you will not win (you might not lose, but you won't win), even if you're in the right.

(*) Okay, the ACBL has set themselves up for a couple of "gone too far" situations, and there absolutely have been "it's clear partner woke up to that 2♥ was not a transfer after his 15-17 1NT because partner announced - correctly - '10-12' NV" cases, and I expect - but have not seen - accusations of wakeups from unusual transfer announcements (Capp/1Mx being the start, but "transfers after transfer lebensohl" (and transfer lebensohl itself, frankly) being a big one). I'm sure other RAs with Announcements have similar corner cases. But almost all the time, we're still at "Announcements for things opponents need to know but partner will never forget".