[maris oren]

partner opened with 1 D. Opponent passed. What do I respond with 12 Hcp, 5 clubs and 4 S?

[ahydra]

What system?

If standard (SAYC/acol type), then 2C. If you deem your hand good enough to GF, as is most likely, then you plan to rebid 2S over a 2D rebid from opener.

If 2/1 then 2C if you think the hand merits a GF, else 1S.

In both cases you might choose 1S if the clubs are really bad compared to the spades, e.g. ♠KQJx ♥AQx ♦x ♣85432

ahydra

[nullve]

ahydra, on 2019-December-12, 07:04, said:

What system?

If standard (SAYC/acol type), then 2C. If you deem your hand good enough to GF, as is most likely, then you plan to rebid 2S over a 2D rebid from opener.

I'm not aware of any standard system that always allows you to explore a 4-4 spade fit after 1♦-2♣, or 1♥-2♣/♦ for that matter (see this newer but similar thread), without forcing to game. So if you think a typical hand with 12 hcp, 5 clubs and 4 spades is only worth an invite, it might be wiser to respond 1♠. Are you sure that isn't already what Acol/SAYC players are supposed to do?

ahydra, on 2019-December-12, 07:04, said:

If 2/1 then 2C if you think the hand merits a GF, else 1S.

In both cases you might choose 1S if the clubs are really bad compared to the spades, e.g. ♠KQJx ♥AQx ♦x ♣85432

Agree.

[Cyberyeti]

nullve, on 2019-December-29, 06:21, said:

I'm not aware of any standard system that always allows you to explore a 4-4 spade fit after 1♦-2♣, or 1♥-2♣/♦ for that matter (see this newer but similar thread), without forcing to game. So if you think a typical hand with 12 hcp, 5 clubs and 4 spades is only worth an invite, it might be wiser to respond 1♠. Are you sure that isn't already what Acol/SAYC players are supposed to do?

1♦-2♣-2♦ if you play any sort of gadget here allows you to explore game without committing, we play an artificial 2♥ so 2♠ shows 10-bad 12 with better hands through 2♥.

That said, I'm not sure 1♦-2♣-2♦-2M-2N/3♦ is forcing for everybody.