[donnamf]

In one of my partnerships we play jump rebids by responder are game forcing, e.g. 1C-1H-2C-3H. Since this is normally invitational I think it should be alerted, but I can’t find this specific situation addressed anywhere. I’m thinking it’s info the opponents should have, therefore it’s alertable. Anyone?

[Stephen Tu]

It depends on jurisdiction, but in the ACBL currently, this kind of thing isn't alertable currently. Natural bids are by default non-alertable, except really weird stuff like non-jump new suit in response to an opening bid or preempt that is NF. Even stuff like 1c-2s, 1s-3c, if the response is natural (and doesn't also show something in another suit), is not alertable, whether the response is weak, strong, or invitational, the opponents have to ask now.
https://web2.acbl.or...-Procedures.pdf

In other countries, rules will differ.

[P_Marlowe]

It is info the opponents are entiteled, ... but assuming, you do not alert it, do you think it
would generate harm?
You need to explain the meaning at the end of the auction, if they ask about the complete auction.

[pescetom]

It is alertable in FIGB: bids which determine unusual conditions of forcing/non-forcing.
WBF is rather strangely only concerned about unusual non-forcing.

[donnamf]

P_Marlowe, on 2024-November-03, 16:03, said:

It is info the opponents are entiteled, ... but assuming, you do not alert it, do you think it
would generate harm?
You need to explain the meaning at the end of the auction, if they ask about the complete auction.

The harm would be that if opps thought it was invitational they could misjudge responder’s high card strength.

[bluenikki]

 Stephen Tu, on 2024-November-03, 15:46, said:

It depends on jurisdiction, but in the ACBL currently, this kind of thing isn't alertable currently. Natural bids are by default non-alertable, except really weird stuff like non-jump new suit in response to an opening bid or preempt that is NF. Even stuff like 1c-2s, 1s-3c, if the response is natural (and doesn't also show something in another suit), is not alertable, whether the response is weak, strong, or invitational, the opponents have to ask now.
https://web2.acbl.or...-Procedures.pdf

In other countries, rules will differ.

There's no place on ACBL convention cards to record it. (I believe.)

[P_Marlowe]

 donnamf, on 2024-November-03, 17:36, said:

The harm would be that if opps thought it was invitational they could misjudge responder’s high card strength.

I am pretty sure, that the followup of the auction will make it clear, that responder will be stronger than inv.
strength.

[jillybean]

 bluenikki, on 2024-November-03, 21:42, said:

There's no place on ACBL convention cards to record it. (I believe.)

This does not relieve you of the responsibility to fully complete a CC

[pescetom]

 P_Marlowe, on 2024-November-03, 23:52, said:

I am pretty sure, that the followup of the auction will make it clear, that responder will be stronger than inv.
strength.

The followups may be too late. If I am willing to sacrifice in 5C over 4H then I really want to know now if it is a game force.

[barmar]

 P_Marlowe, on 2024-November-03, 23:52, said:

I am pretty sure, that the followup of the auction will make it clear, that responder will be stronger than inv.
strength.

True if a slam exploration ensues.

But if opener just bids game, how do you know whether it's opener or responder who had extra?

[pescetom]

 barmar, on 2024-November-04, 15:38, said:

True if a slam exploration ensues.

Not true there either, if we had any hint it would ensue: even more reason to stick 5♣ in the spokes.

[jdiana]

This probably goes without saying, but if you're playing online, there's no harm in alerting it even though it's not required under ACBL rules. Even in a friendly club game, I would alert it because it is unusual. The reason for sticking to the rules and not alerting is that someone could complain that you're potentially giving partner UI by alerting a non-alertable bid. So, in a tournament, I would stick to the rules.