Grand slams - asking in earnest

[shyams]

[hv=pc=n&n=sq7hq85dt876ckq43&d=w&v=b&b=4&a=ppp2c(Strong%20two%20club%3A%2019%2BHCP%3B%2023%2Btotal%20pts%3B%20forcing%20to%202N)2d(11-%20HCP%3B%20twice%20rebiddable%20!D%3B%209-12%20total%20points)2n(Positive%20NT%20--%202-5!C%202-5!D%202-4!H%202-4!S%3B%208-11%20HCP%3B%2012-%20total%20pts)p3h(5%2B%20!H%3B19%2B%20HCP%3B23%2B%20total%20pts)p4n(Blackwood%20%5BH%5D%20-%202-5!C%202-5!D%203-4!H%202-4!S%3B8-11%20HCP%3B%209-12%20total%20pts)p5n(Even%20no.%20of%20keycards%20%26%20some%20void%20--%205%2B!H%3B%2019%2BHCP%3B%2023%2B%20total%20pts)p6h(Why%20not%207!H%3F)]133|200[/hv]

This is from the daily free MPs tournament. North was a Robot and chose to bid 6♥ at this time. I (South) held:

[hv=pc=n&s=sakj92hakj763dcat]133|100[/hv]

6♥+1 scored 53.8% whereas 7♥= was 90.8%

 

As an afterthought, I felt that all deals in the Robot North's sample (if it does sampling at this stage) should indicate 7♥ is the logical/correct bid. I'm asking in earnest whether sampling works at different stages of bidding and (if so) why North would not directly bid the grand slam.

[lycier]

Obviously, it is very rediculous for its responder to be a captain.

[iandayre]

Perhaps. Reverse your minor suit holdings and the grand requires 2-2 H and 4-2 or better S. I guess you make with H 3-1 and the ruffing finesse working - or if they try to cash the A at T1.

 

I wonder what the definition of 6D is over 4NT? Even # of key cards with D void? Bingo. But GIB would not be able to process that, even if it were available.

 

It is sad but somewhat humorous that most of the times GIB bids a grand slam it is in reaction to an aggressive bid by partner that is described erroneously as showing the earth, moon and stars. When GIB uses 4NT then 5NT, and as a result can count 13 easy tricks in NT, it signs off in 6 anyway.

[manudude03]

I wonder what the definition of 6D is over 4NT? Even # of key cards with D void? Bingo. But GIB would not be able to process that, even if it were available.

 

6D would show an odd number of key cards and a diamond void. In the OP hand, I imagine GIB was worried about there only being 2 key cards opposite or the void not being in diamonds.

[cloa513]

[hv=pc=n&n=sq7hq85dt876ckq43&d=w&v=b&b=4&a=ppp2c(Strong%20two%20club%3A%2019%2BHCP%3B%2023%2Btotal%20pts%3B%20forcing%20to%202N)2d(11-%20HCP%3B%20twice%20rebiddable%20!D%3B%209-12%20total%20points)2n(Positive%20NT%20--%202-5!C%202-5!D%202-4!H%202-4!S%3B%208-11%20HCP%3B%2012-%20total%20pts)p3h(5%2B%20!H%3B19%2B%20HCP%3B23%2B%20total%20pts)p4n(Blackwood%20%5BH%5D%20-%202-5!C%202-5!D%203-4!H%202-4!S%3B8-11%20HCP%3B%209-12%20total%20pts)p5n(Even%20no.%20of%20keycards%20%26%20some%20void%20--%205%2B!H%3B%2019%2BHCP%3B%2023%2B%20total%20pts)p6h(Why%20not%207!H%3F)]133|200[/hv]

This is from the daily free MPs tournament. North was a Robot and chose to bid 6♥ at this time. I (South) held:

[hv=pc=n&s=sakj92hakj763dcat]133|100[/hv]

6♥+1 scored 53.8% whereas 7♥= was 90.8%

 

As an afterthought, I felt that all deals in the Robot North's sample (if it does sampling at this stage) should indicate 7♥ is the logical/correct bid. I'm asking in earnest whether sampling works at different stages of bidding and (if so) why North would not directly bid the grand slam.

Given how extreme your hand is, your response to 4NT is 7♥- partner has no aces and just strength and some support. Don't worry you aren't alone some "experts" don't allow for their hands are and subside at lower level than is sensible.

[shyams]

Given how extreme your hand is, your response to 4NT is 7♥- partner has no aces and just strength and some support. Don't worry you aren't alone some "experts" don't allow for their hands are and subside at lower level than is sensible.

This post isn't about the ideal bidding sequence for the human. I just want to focus on why North (the Robot) was unable to conclude/infer that 7♥ is the proper bid.

 

For example, manudude03 pointed out that perhaps the Robot expected two key cards and/or void not being in diamonds. It sounds possible to construct such a hand. However, the probability of it being generated in a simulation sample feels low to me.

[cloa513]

This post isn't about the ideal bidding sequence for the human. I just want to focus on why North (the Robot) was unable to conclude/infer that 7♥ is the proper bid.

 

For example, manudude03 pointed out that perhaps the Robot expected two key cards and/or void not being in diamonds. It sounds possible to construct such a hand. However, the probability of it being generated in a simulation sample feels low to me.

How can it possibly- it is beyond what an not so intelligent expert human can handle.

[Lovera]

3♦ Michaels by S could solve this situation and is managed by GIB: you don't know about support that can be 3♥ or 3♠. Luckly is 3♥ and is this way that allow you to drive GIB where you want.

[pescetom]

3♦ Michaels by S could solve this situation and is managed by GIB: you don't know about support that can be 3♥ or 3♠.

 

Are you sure Michaels is managed by GIB in this particular situation?

I wouldn't expect it even from a human partner.

But a human would know not to make the stupid 2NT response and thus allow us to find the hearts fit at 3-level where there is space to nail down a grand precisely.

[Lovera]

Are you sure Michaels is managed by GIB in this particular situation?

I wouldn't expect it even from a human partner.

But a human would know not to make the stupid 2NT response and thus allow us to find the hearts fit at 3-level where there is space to nail down a grand precisely.

 

What's happening if 3♦ is inserted in box of GIB bidding (Michaels is used by GIB)?