Grand slam and precision

[bob100147]

We play precision and missed a grand slam on the following hand. South was dealer.

 

[hv=pc=n&s=sk8hakqjtda7caq98&n=saqjt5h63dk985cj5]133|200[/hv]

 

7 is obviously cold. Anyone have a suggestion on how to find this one?

[dake50]

7 is obviously cold. Anyone have a suggestion on how to find this one?

 

1C-1H- 16+ - 8+, 5+Spades

1S-2H- trump ask(spades) - 2 tops (AKQ)

2s-2NT- number aces - 0

3C-3D- show K - DK (3S is none)

3H-3S- show more - SJ (4S is no more)

7NT. counting 5+S +5xH +DAK +CA

[bob100147]

7 is obviously cold. Anyone have a suggestion on how to find this one?

 

1C-1H- 16+ - 8+, 5+Spades

1S-2H- trump ask(spades) - 2 tops (AKQ)

2s-2NT- number aces - 0

3C-3D- show K - DK (3S is none)

3H-3S- show more - SJ (4S is no more)

7NT. counting 5+S +5xH +DAK +CA

 

Would South complete the transfer to spades or would south show the heart suit?

[FM75]

It is obviously cold looking at both hands. The question is whether you can determine the spade high cards. I suspect that there aren't any systems that can find AQJ and the ten. Partner holding the ten is about 25%. He has 2 of the unknown 8 cards.

 

So you have a 16% possibility of finding spades 5-1 or 6-0. Even then, you only pick up the suit in about 25% of the cases - very roughly. So picking up 7N with 5,5,2,1 tricks off the top is about 88%. If he has the 9 (12.5%) you have a small chance of picking up the suit on a 5-1 split, if the 10 drops under the K for another 1% approximately.

 

If that does not happen, you are looking at another 5% where the club K is onside and some chances on a squeeze. Seems like about 95% slam on methods that can find the top 3 missing spade honors. You will know that you are missing the club K.

[rbforster]

I wouldn't find it. I would probably just end up in 6N (or maybe 6H). Even if I took an aggressive view as South and asked a lot of questions, I can find the JS but not the T.

[rbforster]

(Dupe)

[dake50]

Would South complete the transfer to spades or would south show the heart suit?

 

*** When South sees his own tricks ask what are added from partner.

But, yes generally, accept shows 3+, so show own 5-suit.

[Cyberyeti]

Even pretty average methods should get you to 7♥, ♠AQxxx and ♦K is enough to make 7♥ on (3-3 spades and hearts not 6-0) or (spades 4-2 and hearts not 5-1/6-0 and the club finesse which is decent odds for a hand where everybody is likely to be in a slam of some sort, partner can also have things like ♣J10 which improve the odds giving you chances on ♠5-1 and 6-0, even ♣Jx or 10x or the addition of ♦J give you a small chance.

 

Simple old fashioned asking bids reveal 3 controls and ♠AQxxx, then a cue bid reveals that the K is in diamonds rather than clubs.

[Mbodell]

For me with me with no opp bidding:

 

1♣ - 1♥ 16+; 8+ hcp, 2+ ctls, 4+♠

1♠ - 2♣ relay; 4+♦

2♦ - 3♣ relay; 5=2=4=2

3♦ - 3♠ relay control ask; 3 ctls (A=2;K=1)

4♥ - 5♣ super viking; exactly 1 of the K or Q of both ♠ and ♦ and 0 of the K and Q of ♥

5♦ - 5♥ relay; exactly 0 of K and Q of ♣

5♠ - 6♣ relay; ♠J not the ♦J

7nt (we have 12 top tricks and our 13th is in ♠ assuming AQJ?? opposite K8 - where the ? can include the T or 9 - can play for 5 tricks which is like 90%, and even in the 10% of if that fails we can fall back on at worse the club finesse or possibly a double squeeze with diamonds as the pivot)

 

FWIW I can't necessarily find the ♠T (if partner had the same hand but no ♣J) until a 7♣ question where 7♦ would answer no ♠T and 7♥ would say yes ♠T but I can't get out in 7♥ over the no answer (I have once in my life had a situation where a 7♥ relay question would give the right answer between 7♠ and 7nt, unfortunately it was in a practice bidding session). But because he has the club J on this hand I do find the ♠T at a 7♦ answer to my 6♠ ask.