[cencio]

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[pescetom]

It asks you to bid 2♣.

[jillybean]

Unlike many XX's in BBO Main Bridge club, partner is not saying "I think we can make this"
I have a great, well, unforgettable story about XX

[Huibertus]

It is what you agree it is.

1. You need a mechanism to be able to play 1NT XX.
2. You need a mechanism to escape 1NT X
2.a with any single suited hand.
2.b with any two suiter.
2.c with any three suiter.
3. You MAY want a mechanism to invite with light major two suiters
4. With any decent invite just blast game, the fact the opponents have bid will help declare play and more sharp games will be made because of it.

In order to be able to do all of that you need transfers, pass a transfer to XX, XX to clubs et cetera:
pass forces XX which you will pass if you want to play 1NT XX (bidding would show other things)
XX and bids up to 2♥ are transfers, XX to clubs, et cetera. You will pass the accepted transfer with the suit, OR the 3 other suits, in which case you will XX if they choose to double you. If you don't pass the accepted transfer you show two suiters to escape (ie XX-2♣-2♦ to show ♦ and a major, or maybe ♦/♥ depending on the scheme you design.
You could include 2♠ as a Game Forcing Stayman.

[Joe_Old]

X means, "we are beating 1NT". That means Opener and Responder together have shown more than 20 HCPs. Therefore, XX must be SOS, with a very weak hand, and asks the 1NT bidder to bid 2C.

[pescetom]

 jillybean, on 2026-August-17, 08:36, said:

I have a great, well, unforgettable story about XX

So tell it?
Things are quiet here (off to play with ex pickup again... he wants to add XYZ to his already steep learning curve, see if he can pull that off first time or not. Of course now it will never come up).

[jillybean]

This was from my first team game, first Regional tournament.
I was playing with an expert player, and our teammates were another master/rookie pair. Of course we are playing in one of the top brackets.

At this point in my bridge journey, I was under the impression that bridge was a game of non-stop action. Passing was boring; bidding was winning, if I had cards in my hand, I bid.

Board 2.
I confidently bid 2 Clubs, and the opponent doubled. My expert partner pulled out the Redouble (XX) card.
Now, using my flawless rookie logic, I reasoned: “If a Double means they think we can’t make it, then a Redouble must mean partner knows we absolutely CAN make it!”

With only a wee bit of trepidation, I passed .It turns out partner did not think we could make it. (I later learned about rescue redoubles and sound overcalls).The opening lead was made, dummy hit, and I felt sick. I won exactly two tricks.
Down 6, vulnerable, redoubled. -3400 points. End of team game.

My hand was something like:

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[pescetom]

jillybean, on 2026-August-20, 07:07, said:

This was from my first team game, first Regional tournament.
I was playing with an expert player, and our teammates were another master/rookie pair. Of course we are playing in one of the top brackets.

At this point in my bridge journey, I was under the impression that bridge was a game of non-stop action. Passing was boring; bidding was winning, if I had cards in my hand, I bid.

Board 2.
I confidently bid 2 Clubs, and the opponent doubled. My expert partner pulled out the Redouble (XX) card.
Now, using my flawless rookie logic, I reasoned: “If a Double means they think we can’t make it, then a Redouble must mean partner knows we absolutely CAN make it!”

With only a wee bit of trepidation, I passed .It turns out partner did not think we could make it. (I later learned about rescue redoubles and sound overcalls).The opening lead was made, dummy hit, and I felt sick. I won exactly two tricks.
Down 6, vulnerable, redoubled. -3400 points. End of team game.

My hand was something like:

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You were unlucky not to make a third trick
Sound overcalls are the real lesson.