[wzhong]

In SAYC, opener North opens with 1♠, E bids DBL, South (responder) bids of 2♠ or 3♠. Is it stop bid or opener should following SAYC rule (ignore E's DBL bid)?

[hevnandhel]

SAYC, as far as I can tell, does not define what these raises after a double indicate.

However, many people play these raises as weak or preemptive. Stronger hands can redouble and/or use a convention such as Jordan/Truscott 2NT (or variants such as Flip Flop).

[hevnandhel]

I may have to correct myself; the SAYC pamphlet does include a section on competitive bidding which states: "Bids mean the same things they meant without the intervening bid".

So 1♠-(X)-3♠ would still be a limit raise. But that's not how many people would play it.

[jodepp]

It is my understanding that 1♠-X-3♠ is standard, and thus SAYC.

[Stephen Tu]

The printed SAYC card notes that over double, 2nt is limit raise after both major & minor openings. This implies that 1♠-x-3♠ is weak, which is a pretty standard treatment.

1♠-x-2♠, though is the normal raise strength = what it would be without double. In order to play this as weaker than a standard raise, you need a different bid for the top end of a normal raise, e.g. xfers over a major double or BROMAD, which SAYC doesn't include.

[case_no_6]

According to modern practice and dating to at least as early as 1950-ish, raises to any level after a takeout double are obstructive (preemptive).

[Zelandakh]

The SAYC booklet explicitly mentions (towards the bottom of page 7) that a double jump is preemptive after a takeout double. This is an exception to the standard rule of bids retaining their normal meanings after interference.

[TylerE]

But this is only a SINGLE jump, not a double jump.

[Zelandakh]

 TylerE, on 2015-October-02, 15:30, said:

But this is only a SINGLE jump, not a double jump.

I meant a raise from 1 to 3 after a double. If you take a look at the booklet you will see it there.