[nigel_k]

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IMPs. Expert partner, few agreements.

[twoshy]

I like the fourth trump and the fifth spade, but not the ♦K and the ♥Q would probably be better in spades. I'll pass and see what partner reckons.

[dake50]

In front of partner's overcall, I won't encourage a slam looking at
C:xx D:Kx = 3 losers in their mm hand. Given a limit raise+ 2D,
this hand is defense: SA +HA.
Partner is still aware 5H may make. He decides.
Double.

[jogs]

Should have been playing fit-jumps.
1♦ - 1♥ - p - 2♠

Partner would know about 5-4 in spades/hearts by advancer's first bid.

In either case double 5♦. Singleton rule.

[Phil]

jogs, on 2012-October-22, 07:09, said:

Should have been playing fit-jumps.
1♦ - 1♥ - p - 2♠

Many (including me) do not play fit jumps when RHO passes. Since 1♠ is constructive (max - 13 or so), 2♠ just shows a better hand.

I would double on the actual hand.

[Fluffy]

first of all, are we in a forcing pass situation? our bidding doesn't suggest it, but opponents bidding do, so I wouldn't be so sure.

if its our hand I double to show not offensive hand, if it is not ours double to show extras.

[jogs]

Phil, on 2012-October-22, 11:19, said:

Many (including me) do not play fit jumps when RHO passes. Since 1♠ is constructive (max - 13 or so), 2♠ just shows a better hand.

I would double on the actual hand.

1♦ - 1♥ - p - ?

You can't double on this sequence. You won't hold 13+ HCP in this sequence very often. Fit jumps just occur much more frequently. Also 2♦ can show all big hands. Although 13 HCP hands without a fit may contain many wasted values. Many systems reserve bids for hands that rarely occur.
If 1♠ is constructive, forcing? , there is no need for an upper limit.

[Zelandakh]

jogs, Phil plays a 1♠ advance as constructive and not forcing, which is very much in fashion just now. There are pros and cons to both approaches, the main point being that if you will not hold 13+ hcp very often, why not allow a 1♠ advance to be non-forcing rather than catering to those rarer hands? A non-forcing 1♠ advance occurs considerably more often than a 2♠ fit jump. His comment about doubling was in the OP auction after 5♦.

[jogs]

Zelandakh, on 2012-October-23, 06:20, said:

jogs, Phil plays a 1♠ advance as constructive and not forcing, which is very much in fashion just now. There are pros and cons to both approaches, the main point being that if you will not hold 13+ hcp very often, why not allow a 1♠ advance to be non-forcing rather than catering to those rarer hands? A non-forcing 1♠ advance occurs considerably more often than a 2♠ fit jump. His comment about doubling was in the OP auction after 5♦.

I like 1♠ as constructive, not forcing.
If South had bid 2♠ fit jump the double would show 5=4=2=2. North would be in a better position to know what to bid on his turn.