[wobur123]

S.....P
W....1 C
N.....1 H
E......1 S

Does East's bid promise 5 S?

Thanks,

Wobur

[manudude03]

Playing standard yes*. With 4 spades you would double.

* There are other schemes where it either shows 4+ or is artificial, but I assume you just want to know standard.

[iandayre]

It's more specific than "after interference". 1S shows 5 after a 1H overcall, but promises only 4 had the overcall been 1D.

[the hog]

The answer is that it depends on your agreements, NOT on the system. For me it shows 4.

[whereagles]

The case of

1m (1♥) 1♠

more or less has a standard, which is to dbl with 4 spades, bid 1♠ with 5. But yes, some pairs (good ones even) play this in some other way.


There is considerably less consensus on the case

1♣ (1♦) 1M

for which the "standard", if there is one, usually depends on the country.

[P_Marlowe]

the answer to your question is related to the question, what X instead of 1S
would show.
If X is a neg. double, but does it specifically always show 4 spades.
My impression is, that the meaning of X is area dependend, and it is certainly
true, that in North America the standard meaning of X is, that it showes 4S.

Why cant I bid 1S, when holding 4+ spades, the bid I would have made without
the intervention. Which is be the natural reaction, if you dont invest a lot,
and we are in the Natural Bidding Section.

Tell us where you live, and we may be able to tell you, what the standard meaning
of X is in the area you live.

but if X showes 4 spades, than you dont need 1S to show 4+, a natural change would
be, to change the meaning so that 1S showes 5+.

Similar, if the intervention was a 1D overcall, if X showes only 4-3 in the majors,
you could modify 1H / 1S response that it promises 5+, if X showes 44 in majors,
a 1H / 1S response will need to be made with 4+.

With kind regards
Marlowe