GIB don't understand splinter on the evaluation hand

[lycier]

[hv=sn=lycier&s=SQ95HAT76DAKJ83C4&wn=机器人&w=S873HJ54DQ764C932&nn=机器人&n=SAKJHKQ982D9CT765&en=机器人&e=ST642H3DT52CAKQJ8&d=n&v=o&b=13&a=1H(Major%20suit%20opening%20--%205+%20H%3B%2011-21%20HCP%3B%2012-22%20total%20points)2C(Two-level%20overcall%20--%205+%20C%3B%2010+%20HCP%3B%2011-18%20total%20points)2D(Free%20bid%20--%205+%20D%3B%2011+%20total%20points%3B%20forcing)P2H(Default%20response%3B%20rebid%20suit%20--%202-%20D%3B%205+%20H%3B%2011-21%20HCP%3B%2012-22%20total%20points)P4C(1-%20C%3B%205+%20D%3B%203+%20H%3B%2013+%20total%20points)P4H(2-%20D%3B%205+%20H%3B%2011+%20HCP%3B%2012-17%20total%20points)PPP&p=CKC4C2C6S2S9S3SJH9H3HAH4HTHJHKD2C7C8H7C9S5S7SASTCTCAH6C3SQS8SKS6HQDTD8H5H8D5D3D7D9S4DAD6]499|350[/hv]

 

I can't think GIB understand how to evaluate on splinter bid,so we lost slam,very pity.

[georgi]

4♦ would show ♦A which GIB doesn't have.

 

4♣ is still 13+TP so to bid 4♠ showing the Ace GIB has it need more points then it has at the moment.

 

So over 4♥ you could show ♦A using 5♦ which as tested GIB happily will be glad to hear and bid 6♥. as 5♦ will show stronger hand by you.

[1eyedjack]

4♦ would show ♦A which GIB doesn't have.

 

4♣ is still 13+TP so to bid 4♠ showing the Ace GIB has it need more points then it has at the moment.

 

So over 4♥ you could show ♦A using 5♦ which as tested GIB happily will be glad to hear and bid 6♥. as 5♦ will show stronger hand by you.

 

I strongly disagree with most of this, and agree with the OP. It is my observation that GIB's ability to continue after a splinter is very unintelligent. It will happily make a splinter, but responding to splinters is a definite weakness.

 

When you have Txxx opposite a singleton you are almost playing with a 30 HCP deck. OK, a bit more - opposite a void it would be a 30 HCP deck.

 

The purpose of South's splinter is so that North does not evaluate

 

♠AKJ

♥KQ982

♦9

♣T765

 

as being of equivalent strength to

 

♠T765

♥KQ982

♦9

♣AKJ

 

The latter is worth a sign-off, with a reasonable expectation of already being too high

The former is worth committing to 5 level, assuming GIB does not play last train (and maybe too strong for last train anyway)

 

Opposite a splinter, you are under a lot of pressure to indicate whether your hand has improved or deteriorated in light of this information about the shortage. That pressure is intensified where the number of bids available below game are restricted, and even more so when a serious/non-serious 3N is not available (not that GIB plays that either I think)

[Antrax]

I'm with them. GIB's splinter judgment is awful. When I splinter it seemingly never moves forward on its own (it once signed off with xxxx in the splinter suit), when it splinters it almost always has a singleton ace.