How do you overcall in this hand?

[lycier]

This is a Gib hand. May I ask you a question ?

[hv=pc=n&s=saq5hkqt64d4ckq74&d=w&v=0&b=8&a=pp1s?]133|200[/hv]

 

If you have a south hand, what's your choice?

[nullve]

1N

[1eyedjack]

I don't understand the poll choices

(1) X (understandable)

(2) 2H (described as aggressive weak jump overcall) (not understandable)

 

Against robots I agree with the above poster: 1N

 

Next choice would be 1H (not poll option), which I find from experience with robots to be their preference

 

Last choice would be X.

 

2H would not be considered

 

[EDIT] load a rubbish - as Stephen Tu says in next post I had seen 1C opener. Still stick with 1N

[Stephen Tu]

I think you are misreading opening bid. 1 spade, not 1 club.

[The_Badger]

hi lycier,

 

Whilst I agree with nullve's 1NT overcall, that's a big hand knowing the ♠ and opening bidder are under you. Just as a hand it comes out at 18.05 on Kaplan & Rubens hand evaluator.

 

2♥ could well be passed out I feel, when partner doesn't need much to make game a possibility.

 

On this occasion, I'll go for X. It's not ideal as it could present rebid problems. 2♥ looks the sensible overcall but I feel it is an underbid, in my opinion.

[iandayre]

Only a near-maximum for an overcall. I want more than this to double and bid. 2H. 1NT?? Could work, not my style.

[lycier]

Hi , many thanks to everyone.

 

1- If your choice is 1N, how about Gib?

I have to say fairly that Gib never choose 1N on Gib CC, but......see example hand.

[hv=http://www.bridgebase.com/tools/handviewer.html?bbo=y&myhand=M-535012789-1472255674]400|300[/hv]

 

Now see its result, fortunately 3♣N+2. However I think it is only for a good day, if in a bad day,

 

[hv=http://www.bridgebase.com/tools/handviewer.html?sn=lycier&s=SAQ5HKQT64D974CKQ&wn=Robot&w=S86HJ9532DTCA7542&nn=Robot&n=SK9HA8D8653CJ9863&en=Robot&e=SJT7432H7DAKQJ2CT&d=w&v=o&b=8&a=PP1S(Major%20suit%20opening%20--%205+%20%21S%3B%2011-21%20HCP%3B%2012-22%20total%20points)1N(One%20notrump%20overcall%20--%202-5%20%21C%3B%202-5%20%21D%3B%202-5%20%21H%3B%202-5%20%21S%3B%2015+%20HCP%3B%2018-%20total%20points%3B%20stop%20in%20%21S)PP2D(4+%20%21D%3B%205+%20%21S%3B%2011-21%20HCP%3B%2012-22%20total%20points)2H(2-5%20%21C%3B%202-5%20%21D%3B%204-5%20%21H%3B%202-5%20%21S%3B%2017+%20HCP%3B%2018%20total%20points%3B%20stop%20in%20%21S)P3C(4+%20%21C%3B%203-%20%21H%3B%207-8%20total%20points)PPP&p=SJSQS8S9S5S6SKSTH8H7HKH2SAC7C9S7HACTH4H9DJD7DTD3DQD9C5D8CAC3D2CQC4CJS3CKHQH5D6S4HTHJC8S2C6DKD4C2D5DAH6H3]400|300[/hv]

 

Its result is 3♣N-1

 

2- If the choice is 2♥, you will get 50% score in MP.

[hv=http://www.bridgebase.com/tools/handviewer.html?bbo=y&myhand=M-535012786-1472255674]400|300[/hv]

The result : 2♥S+1

 

3- If the choice is double, Gib will take a rediculous auction.

 

[hv=http://www.bridgebase.com/tools/handviewer.html?sn=Robot&s=SAQ5HKQT64D4CKQ74&wn=Robot&w=S86HJ9532DT97CA52&nn=Robot&n=SK9HA8D8653CJ9863&en=Robot&e=SJT7432H7DAKQJ2CT&d=w&v=o&b=8&a=PP1S(Major%20suit%20opening%20--%205+%20%21S%3B%2011-21%20HCP%3B%2012-22%20total%20points)D(Takeout%20double%20--%203-5%20%21C%3B%203-5%20%21D%3B%203-4%20%21H%3B%202-%20%21S%3B%2012+%20total%20points)P2C(4+%20%21C%3B%209-%20total%20points)2D(5+%20%21S%3B%2021-%20HCP%3B%20biddable%20%21D%3B%2015-22%20total%20points)3H(twice%20rebiddable%20%21H%3B%2020+%20total%20points)P4H(4+%20%21C%3B%202+%20%21H%3B%209-%20total%20points)PPP&p=S8S9STSQH4H9HAH7SKS2S5S6H8D2HKH5C7C2CJCTC9SJC4CAD7D5DJD4S7SAH2D8D9D6DQHTHQH3C3S4CKC5C8S3CQDTC6DKH6HJD3DA]400|300[/hv]

Here, very difficult to understand jump 3♥.

BTW, after 2♦, if South wants to raise 3♣, it shows " 4+♣,18-20TPs " on Gib CC.

[1eyedjack]

I think that part of the problem is that after having overcalled 1N Gib allows South to back in with 2H on as few as 4 card h suit, making it hard for North to pass with only 2 card support.

 

Gib does this in a lot of situations when really you would only bid with 5.

[helene_t]

Nihao Lycier,

 

I like your analyses, looking at different GIB solutions and comparing the results. Very helpful.

 

I am not sure what I would do. I think the hand is just good enough for double but I wouldn't argue with 2♥ or 1NT.

 

Obviously, if I started with double then 2♥ on the next round is enough.

[jdonn]

With GIB you should avoid making off-shape doubles like the plague. No amount of rebidding a suit will convince him you don't have support for all the suits. From what I am told, it is a very difficult thing to program for GIB to understand double then bid might be on a wide variety of shapes.

 

With the hand given, I would overcall 2H even playing with a human, so with GIB it's easy.