Jump Rebid by GIB

[iandayre]

Here is an example hand of something I have seen GIB do several times in recent weeks:

 

http://tinyurl.com/pot4br6

 

GIB will open 1 of a Major in 1st seat, P, P, Double. It now leaps to 3 of the major with hands that were only slightly too strong to open a weak 2 to begin with. This is the weakest hand I've seen but all are in the 11-13 HCP range.

 

Does anyone consider this a normal bridge action? Is this what BBO expects GIB to do with such hands? For all W knows, N may have been planning to pass 1S doubled. Just wondering. I do see that the explanation is accurate. As you see I had more than enough to reopen with a double and GIB guessed well to pass - I would have pulled to 4H, which would have been much better had I held a small singleton or void in Spades.

[steve2005]

2♠ looks dangerous opposite a p who couldn't take a bid but know of people who would do it anyways at mp. 3♠ is just silly.

[1eyedjack]

3S is absurd.

 

2S would be absurd in a F2F game. It may (now) be absurd against GIB but not so long ago at least 2S had (v GIB) a tactical possibility because next hand would not double for penalties despite that it would have converted partner's earlier double for penalties. So if the protective hand does not re-open with another double, you bought the hand undoubled, a level higher but at a profit. It is possible that this bug has by now been addressed. But that does not excuse this bidding on this hand.

[cloa513]

Though it did keep you out of a making 6♥ made by South- how you bid to it is probably impossible. If it was green rather orange then it would be a goodish bid.

[uva72uva72]

The jump rebid you've reported is something that I've encountered (and benefited from) a number of times. Yesterday, at matchpoints in an ACBL robot individual for example:

 

My link

On the other extreme, however, I encountered this today in an ACBL IMP pairs robot individual:

 

My link

 

This hand is interesting several ways:

 

- Obviously, West has game in hand but only bid as high as 3♥ at 1 of 19 tables, in contrast to its jumps to 3♠ with much weaker hands (such as the original example)

- N/S have a better than 80% vulnerable game in ♠s, but it was bid at only 2 tables. As noted, that wasn't because West was upping the ante in ♥s. I suspect it's in part because some South's didn't realize that their second t/o double, which sounds strong, promises only 13 total points in BBO's system.

[iandayre]

The jump rebid you've reported is something that I've encountered (and benefited from) a number of times. Yesterday, at matchpoints in an ACBL robot individual for example:

 

My link

On the other extreme, however, I encountered this today in an ACBL IMP pairs robot individual:

 

My link

 

This hand is interesting several ways:

 

- Obviously, West has game in hand but only bid as high as 3♥ at 1 of 19 tables, in contrast to its jumps to 3♠ with much weaker hands (such as the original example)

- N/S have a better than 80% vulnerable game in ♠s, but it was bid at only 2 tables. As noted, that wasn't because West was upping the ante in ♥s. I suspect it's in part because some South's didn't realize that their second t/o double, which sounds strong, promises only 13 total points in BBO's system.

 

Good examples. It would be hard to find two better hands, when seen together, that illustrate the most severe of GIB's problems.

[iandayre]

Good examples. It would be hard to find two better hands, when seen together, that illustrate the most severe of GIB's problems. So now those of us who are regulars know for sure to be aggressive when GIB jumps, and very wary when GIB makes a simple rebid of its suit.