[whereagles]

 Trinidad, on 2014-June-25, 02:22, said:

I would say that missing the good slam is what happened.

This is a magic slam. I think it can would only be reach using a relay system. Or taking a flyer.

[hotShot]

I think a big part if not all of the blame has to go to North.

After 2♠ by his partner North knows about the double fit in the black suits.
North has to downgrade his ♠ values for defense because the ♠ most likely split 3-1.
He also has to downgrade partners potential ♣ values as North knows about the 9 card fit there.

So I dislike both North 4♠ bid and his dbl on 5♦.

Unless otherwise agreed, 4♣ should put South into a position to reevaluate his hand now also knowing about the double fit.
After that South has a chance to to show ♥ control with 4♥ or to bid 5♠.

[Cyberyeti]

 whereagles, on 2014-June-25, 06:41, said:

This is a magic slam. I think it can would only be reach using a relay system. Or taking a flyer.

Actually no, several good things could happen, eg 1♣-(1♦)-2♠ and now the weak hand may not have enough for a 3♦ bid so you can proceed on your merry way unopposed, depends on methods, but once S finds out N has extras, 2+Q and no heart control it's simple to bid 6♠ where the only problem would be if you are both have a singleton diamond.

I'm not sure if W would bid 5♦ over 3♠ by S, but I'd expect to play 5♠ if he does unless partner just takes a wild flyer.

[relknes]

First blame goes to South for 2♠. I would probably have cue bid 3♦ to show a stronger raise.

[NickRW]

 Cyberyeti, on 2014-June-25, 04:34, said:

I thought about that, but isn't partner with AQxxx now going to think the suit is solid ?

Well, possibly. But frankly I am not sure I care too much as I personally am not as confident as others here seem to be that 2♠ shows 4 card support.

Nick

[Cyberyeti]

 NickRW, on 2014-June-25, 10:13, said:

Well, possibly. But frankly I am not sure I care too much as I personally am not as confident as others here seem to be that 2♠ shows 4 card support.

Nick

It's not guaranteed, 3415 will also support, but the point is that once you rule out the weak no trump hands, the chance of having 4 increases.

[steve2005]

 NickRW, on 2014-June-25, 04:17, said:

Concur with the sentiments about South's 2♠ rebid. But if North is going to bid 4♠, nothing would have been lost with a 4♣ bid surely to alert South about the double fit

I agree 4♣ clear, you know partners ♠ not good so he will need encouragement