[mw64ahw]

pescetom, on 2026-November-02, 06:44, said:

MP

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You would get 3♠ over 3♣ too.

3N denying 2 of top 3 honours

[pescetom]

WasWinM, on 2026-November-02, 08:24, said:

So your question really isn't how do we bid this but how do we bid this using your system?

No, just that it's not easy to progress a discussion without making and explaining some assumptions about a system.
It was p_marlowe who (rightly) asked what 3♠ might be, I answered.
There are tens of possible alternative auctions possible according to how you interpret 2/1 and what artificial major raises you play.
I tried to keep this as flexible as possible while giving it some context, I could have tried to set it with Jacoby 2NT and/or GF 3 card raises in 1NT or whatever you may prefer.
If we start by showing multiple hands and let you choose your preferred system then other people will whine about that.

In any case we are that that point now, so hands follow.

[pescetom]

jillybean, on 2026-November-02, 07:57, said:

Why is partner jumping in a gf auction?

reading on further, I do not like your system.

You have said that before
And I have implied that I am not so happy with it either, in particular in terms of communication by Responder of length of fit.
Nevertheless I trust the guy who decided it and I have seen a lot worse.
It works, nothing is perfect, it's important to be singing off the same simple page.

jillybean, on 2026-November-02, 07:57, said:

Why is partner jumping in a gf auction?

Jumps have a price and should have a benefit.
This jump to 3M tells us that trumps are fixed and control-bids are in order, stop messing around.
We had many other roads in a game forcing option and chose the big one.

jillybean, on 2026-November-02, 07:57, said:

How do you make a gf raise with 3 spades?

In multiple ways, including this one.
The flaw in the ointment is that Opener cannot distinguish whether any GF raise has 4 spades (but then neither can the opponents).

jillybean, on 2026-November-02, 07:57, said:

Why is partner not bidding 2N

Because he is either willing to play in spades but curious about hand or has reason not to bid NT from his side for now... both 2S and 2N (which does not promise a balanced hand) are exploratory asking Opener to continue to describe.