[jodepp]

If XYZ was 'on', 3♠ seems clear although I think the third call isn't obvious (suppose partner simply raises to 4♠ for example - we're back in the same boat. If that sequence demands a cuebid it's fine but not everybody plays that).

Soapbox time - wouldn't a strong jump shift help here originally

[WesleyC]

Assuming you play some variant of 2-way checkback, then a handy treatment to handle this hand:

1C 1S 1NT 4X is a spade auto-splinter showing a singleton.

1C 1S 1NT 2C* 2D* 4X as a spade auto-splinter showing a void.

Normally I don't like playing conventions that are very low frequency due to memory load issues, but this is such an unusual sequence that it should be impossible to forget.

[akwoo]

jodepp, on 2015-October-30, 18:08, said:

If XYZ was 'on', 3♠ seems clear although I think the third call isn't obvious (suppose partner simply raises to 4♠ for example - we're back in the same boat. If that sequence demands a cuebid it's fine but not everybody plays that).

I don't play 3♠ absolutely demands a cue, but with A/AK you should make one - it's a much better hand opposite a one suiter with slam potential than some scattered 14 count.

I agree with 3♠ one might miss the slam opposite xxx KQxx Ax QJxx, though I think I would make a 5♣ try even opposite a signoff in 4♠.

[Mbodell]

I agree, 3♠, as long as it is agreed/read as forcing is a good bid. If you have less agreements about forcing stuff and can't splinter in partners suit even a heart splinter has something going for it. They might believe your splinter and cash only one heart then switch giving you a potential pitch on the clubs some of the time when you have 12 tricks but 2 quick heart losers.

[PhantomSac]

Mbodell, on 2015-November-02, 03:17, said:

I agree, 3♠, as long as it is agreed/read as forcing is a good bid. If you have less agreements about forcing stuff and can't splinter in partners suit even a heart splinter has something going for it. They might believe your splinter and cash only one heart then switch giving you a potential pitch on the clubs some of the time when you have 12 tricks but 2 quick heart losers.

What will they shift to?

[Fluffy]

1♣-1♠
1NT-4♣ autosplinter would be my bidding.

Slam is great oppposite a 6 count, grand is great opposite an 8 count, there are many more good hands that the one partner held.

[Phil]

1eyedjack, on 2015-October-29, 15:10, said:

If the granny makes opposite the minimum perfect hand, perhaps you should at least be exploring 6.

FYP

[aguahombre]

Fluffy, on 2015-November-03, 04:34, said:

1♣-1♠
1NT-4♣ autosplinter would be my bidding.

Slam is great oppposite a 6 count, grand is great opposite an 8 count, there are many more good hands that the one partner held.

It seems we would want to use our methods (if we have them) by which Responder asks for perfect cards -- rather than just trying to describe this responding hand.