No reasonable bid

[smerriman]

[hv=http://www.bridgebase.com/tools/handviewer.html?sn=smerriman&s=SAK32HA975DQ3CJ87&wn=Robot&w=S985HK82DK6CAQ943&nn=Robot&n=SQJT7HQJDAJT542CT&en=Robot&e=S64HT643D987CK652&d=n&v=n&b=5&a=1D(Minor%20suit%20opening%20--%203+%20%21D%3B%2011-21%20HCP%3B%2012-22%20total%20points)P1H(One%20over%20one%20--%204+%20%21H%3B%206+%20total%20points)2C(Two-level%20overcall%20--%205+%20%21C%3B%2010+%20HCP%3B%2018-%20total%20points)2D(Opener%20rebids%20his%20D%20--%202-%20%21H%3B%203-%20%21S%3B%2011-15%20HCP%3B%20twice%20rebiddable%20%21D%3B%2012-16%20total%20points)P3C(2+%20%21D%3B%204+%20%21H%3B%2012+%20HCP%3B%2013+%20total%20points%3B%20forcing%20to%203N)P3S(2-%20%21H%3B%203%20%21S%3B%2011-15%20HCP%3B%20twice%20rebiddable%20%21D%3B%2012-16%20total%20points%3B%20partial%20stop%20in%20%21S%3B%20forcing)P4D(2+%20%21D%3B%204+%20%21H%3B%2032-%20HCP%3B%2017+%20total%20points)P5D(2-%20%21H%3B%203%20%21S%3B%2011+%20HCP%3B%20twice%20rebiddable%20%21D%3B%2012-13%20total%20points%3B%20partial%20stop%20in%20%21S)PPP&p=C2C7CACTC4D2C5C8S7S4SKS5DQDKDAD7DJD9D3D6DTD8CJH2HQH4H5HKC3D4C6H7&c=11]400|300[/hv]

 

Something went very wrong with the descriptions here.

 

Firstly, Gib's 2♦ apparently denies 4 spades. The bid itself seems fine.

 

The main problem arises after Gib's 3♠. My 4♦ shows 17+ points. Yet there wasn't any alternative bid - the one I really wanted to make was a natural 4♠. Gib described that as.. a cuebid in spades.

 

Incidentally, somehow 5♦ by Gib then shows less points (12-13) than its previous bid (12-16).

[iandayre]

Agreed there is no reason that 2D should deny 4 Spades after the 2C interference. I suspect you would have done better to bid 2S - certainly natural and forcing - yourself next. If GIB doesn't support Spades after that, we have a bigger problem.

[lycier]

I think this is a Gib bidding system problem.

 

First step

With 2♣ interference, opener's rebid-2♦ should deny 3-card ♥ or 4-card ♥ support, and it shouldn't deny 4-card ♠. Here if opener wants to rebid 2♠, it is really a unreasonable bid because 2♠ should show " opener reverse -- 5+♦,4♠,2-♥,21-hcp,18-22TPs".

Here, no problem.

 

Second step

After 2♦, responder can't rebid 2♠ to force to game because 2♠ should show 5-card ♥ + 4-card ♠. So it is only way for south seat to rebid 3♣. Unfortunately opener's rebid 3♠ only shows 3-card♠. There is no way for Gib to find another major fit in such case.

 

Third

See 4♦ and 4♠, their explanations are absurb.

[hv=http://www.bridgebase.com/tools/handviewer.html?sn=lycier&s=SAK32HA975DQ3CJ87&wn=Robot&w=S985HK82DK6CAQ943&nn=Robot&n=SQJT7HQJDAJT542CT&en=Robot&e=S64HT643D987CK652&d=n&v=o&b=1&a=1D(Minor%20suit%20opening%20--%203+%20%21D%3B%2011-21%20HCP%3B%2012-22%20total%20points)P1H(One%20over%20one%20--%204+%20%21H%3B%206+%20total%20points)2C(Two-level%20overcall%20--%205+%20%21C%3B%2010+%20HCP%3B%2018-%20total%20points)2D(Opener%20rebids%20his%20D%20--%202-%20%21H%3B%203-%20%21S%3B%2011-15%20HCP%3B%20twice%20rebiddable%20%21D%3B%2012-16%20total%20points)P3C(2+%20%21D%3B%204+%20%21H%3B%2012+%20HCP%3B%2013+%20total%20points%3B%20forcing%20to%203N)P3S(2-%20%21H%3B%203%20%21S%3B%2011-15%20HCP%3B%20twice%20rebiddable%20%21D%3B%2012-16%20total%20points%3B%20partial%20stop%20in%20%21S%3B%20forcing)P4S(Cue%20bid%20--%201+%20%21C%3B%202+%20%21D%3B%204+%20%21H%3B%20no%20%21CA%3B%20no%20%21HA%3B%20%21SA%3B%2019+%20total%20points)P4N(Blackwood%20%5BD%5D%20--%202-%20%21H%3B%203%20%21S%3B%2015-%20HCP%3B%20twice%20rebiddable%20%21D%3B%2013-16%20total%20points%3B%20partial%20stop%20in%20%21S)P5S(Two%20or%20five%20key%20cards%3B%20queen%20--%201+%20%21C%3B%202+%20%21D%3B%204+%20%21H%3B%20no%20%21CA%3B%20%21DQ%3B%20no%20%21HA%3B%20%21SA%3B%2019+%20total%20points)P6D(2-%20%21H%3B%203%20%21S%3B%2015-%20HCP%3B%20twice%20rebiddable%20%21D%3B%2013-16%20total%20points%3B%20partial%20stop%20in%20%21S)PPP&p=C2C8CACTC4D2C5C7HQH4H5HKH8HJH6H9S7S6SAS8DQDKDAD8DJD9D3D6DTD7S2C3D5C6H7C9D4HTCJS9SQS4S3S5SJH3SKH2HACQSTCK]400|300[/hv]

 

Even if responder really rebids 2♠, opener's 3♠ raise only shows 3 cards ♠.

 

[hv=http://www.bridgebase.com/tools/handviewer.html?sn=lycier&s=SAK32HA975DQ3CJ87&wn=Robot&w=S985HK82DK6CAQ943&nn=Robot&n=SQJT7HQJDAJT542CT&en=Robot&e=S64HT643D987CK652&d=n&v=o&b=1&a=1D(Minor%20suit%20opening%20--%203+%20%21D%3B%2011-21%20HCP%3B%2012-22%20total%20points)P1H(One%20over%20one%20--%204+%20%21H%3B%206+%20total%20points)2C(Two-level%20overcall%20--%205+%20%21C%3B%2010+%20HCP%3B%2018-%20total%20points)2D(Opener%20rebids%20his%20D%20--%202-%20%21H%3B%203-%20%21S%3B%2011-15%20HCP%3B%20twice%20rebiddable%20%21D%3B%2012-16%20total%20points)P2S(Responder%20reverse%20--%205+%20%21H%3B%20biddable%20%21S%3B%2013+%20total%20points%3B%20forcing%20to%203N)P3S(2-%20%21H%3B%203%20%21S%3B%2011-15%20HCP%3B%20twice%20rebiddable%20%21D%3B%2012-16%20total%20points%3B%20likely%20stop%20in%20%21S%3B%20forcing)P4S(5+%20%21H%3B%205+%20%21S%3B%2012+%20HCP%3B%2013-16%20total%20points)PPP&p=CACTC6C7S5S7S6S2STS4S3S8SJD7SKS9DQD6D2D8D3DKDAD9DJH4C8C9DTH3H5H2D4C5H7C4D5H6H9C3HJHTHAH8CJCQSQCKHQC2SAHK]400|300[/hv]

[jdonn]

Yes obviously the problem is that normally a 2D rebid after 1D 1H denies four spades, but a change should be made to account for this auction where 1S is no longer available.