[jillybean]

15-17nt

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[mike777]

would rebid 1NT

1d-1s-1nt

[apollo1201]

With this near solid D suit, you have to pick the least lie. Rebidding them is terrifying.

So either it is 1D 1S 1NT and partner might end up in a 5-1 fit. But finding H will be much easier. Or sometimes partner passes and the spot is not so bad.

Or it is 1D 1S 2C and see from there (maybe you end in a better fit). But we are virtually losing H.

The risk is with a weak hand opposite. With a string partner we will reach the appropriate game.

Some players play 1m 2H to show a weakish 5S and 4+H to ease finding M contacts and avoid some tricky rebids by opener. It eases some sequences with a fit and find good games with little HCP but sometimes you end up in a bad 2M instead of a better 2m, or 3m-1 vs 2m making. Consequences on other sequences (1m 2H strong, NMF, etc.) are also to be considered.

[awm]

You say "plan your rebid" but you never said what partner's response is. In particular:

1. If partner responds 1♥, this is something of a 2.5♥ rebid. Is anyone up for the 3♥ raise?
2. If partner responds 1NT, you know the opponents have a 9+ card spade fit. Pass and hope they don't find it? Or rebid 2♣/2♦?
3. If partner responds 2♣, many people play that 2♦ by opener promises five. Does this suit count as a five-carder? Or raise clubs? Or 2♥ (presuming that doesn't show extras in this auction)?

Of course, it is also possible that the opponents are in the bidding, and you need to make some rebid decisions there too.

People seem to fixate so much on this "what if partner bids my singleton" that they don't always consider all the many other ways the auction can continue.

[P_Marlowe]

1D, followed by 2D, you could sell me a 1NT over 1S, ..., a distant option is 2C.

[jillybean]

I did not say what partner's response was because I think planning your rebid before you make your first bid is a good habit to adopt.
Many hands pose no problem whatsoever, you will raise partner's bid, bid another suit or nt. With a hand like this, you should already know
how you will continue if the auction goes 1D (P) 1S (P). If your bid is 1nt, you can make it in tempo.
A little planning eliminates the tortured pause and sigh (you know I hate being left in 1nt) before the 1nt card is placed on the table and takes any pressure off your partner.

Other than that, it's a 1♦ 1♠ 1nt bid for me. I think I take the low road after 1♦ 1♥ , 2♥ is enough

[DavidKok]

jillybean, on 2025-July-20, 11:37, said:

I think I take the low road after 1♦ 1♥ , 2♥ is enough

I think this is smart for several reasons. Why are the opponents not in this auction? Partner either has a 5=6, or they have a spade fit. If they're not bidding with a spade fit, probably partner is strong. In that case we'll find our good game regardless, but we want to preserve the space in case partner has slam aspirations. In addition, partner probably has 3 or even 4 spades alongside their hearts, and might get too enthusiastic. We also know that their possible honours in diamonds aren't worth what partner thinks they may be, especially at the slam level.

[hrothgar]

I'm going to be in the extra minority here, but I am going to open 1♥, intending to rebid 2!D over 1!S or 1NT

[jillybean]

 hrothgar, on 2025-July-20, 12:05, said:

I'm going to be in the extra minority here, but I am going to open 1♥, intending to rebid 2!D over 1!S or 1NT

Richard, it's the NB forum