[CSGibson]

jillybean, on 2012-February-16, 13:56, said:

I'm sure you are right however I always balk at passing the 3NT trap.
After 4♦ can partner still try for a ♥ fit as long as he has diamond tolerance or would a new suit be a cue? (I haven't ignored your advice Paul, but this is interesting )

Traditionally 4D shows 4 hearts, 6 diamonds, & concentrated values in the two suits with enough playing strength to force to game - its a specialized heart raise. It could work out very badly on this auction, but so could everything else.

[the hog]

No, 3D with 3 card H support is not optimal. We would bid 2NT forcing to show vaious hand types, which responder could check back with 3C.

[jillybean]

CSGibson, on 2012-February-16, 15:26, said:

Traditionally 4D shows 4 hearts, 6 diamonds, & concentrated values in the two suits with enough playing strength to force to game - its a specialized heart raise. It could work out very badly on this auction, but so could everything else.

Ah yes, I remember this now. Thanks.

[Fluffy]

south´s 3♦ is wrong, he can bid 2NT or 3NT, with heart potential I think 2NT is better

1♦-1♥
2NT-3♣
3♥

I don´t think I´d find slam anyway, can´t evaluate the club shortness once it has been denied

[billw55]

Interesting, everybody wants to be in grand here. But that depends on both red suits breaking, perhaps a 65% chance or so? OK that is above the theoretical breakeven points at IMPs. But people are always saying you should be more conservative than that, because from time to time the other table will only be in game (such as 3NT ).

I would probably bid the grand myself, I am that way, but I have sometimes been chastised for it.

[jillybean]

After 1♦ 1♥ 4♦ how does responder show slam interest in either suit?

[Zelandakh]

billw55, on 2012-February-17, 07:41, said:

Interesting, everybody wants to be in grand here. But that depends on both red suits breaking, perhaps a 65% chance or so?

In 7NT, the odds on picking up the heart suit in isolation appear to be over 70% (72?) (Edit) 80% (82?) while the odds of picking up the diamond suit are somewhere around 95%. It is not so bad and we can do even better in a suit slam. More than that though, I just do not see South stopping short once North opens and we find out everything we need to know.

[S2000magic]

billw55, on 2012-February-17, 07:41, said:

Interesting, everybody wants to be in grand here. But that depends on both red suits breaking . . . .

The diamonds don't have to break: you can handle ♦ J 10 4 3 onside as well; only ♦ J 10 4 3 offside kills the diamonds.

[S2000magic]

Overall, the grand has an 81% chance: hearts need to split, or be 4-1 onside, or have a stiff jack onside, and diamonds need to split, or be 4-0 onside.

[billw55]

Yeah I guess it's better than I thought.

[TWO4BRIDGE]

jillybean, on 2012-February-17, 07:53, said:

After 1♦ 1♥ 4♦ how does responder show slam interest in either suit?

I am also interested in the follow-ups to the CWNN ( Convention With No Name ) .

[ For those who haven't followed this, the 4♦-double jump showed 4 cards ♥ support and 6 cards ♦ , normally with the values concetrated in those 2 suits; ergo shortness in one of the blacks. ]

[CSGibson]

As N, if I wanted to follow up, I'd make a cue bid of 5♣. S would cue 5♦, N would sign off, and S would cue 5♠. Since this is a hand where either slam is virtually cold, or is a 5 or 7 proposition, N can then bid 7N or 7♥ (7♥ more likely), but may just subside with a 5N call, in which case S should probably boost to 7♦.

Edit - now that I think about it, N would always bid 5N after 5♠, trusting that if S had a running diamond suit that he would accept & go to grand.