[helene_t]

http://tinyurl.com/yb4dd2tj

Hearts is trumps and they double our 5♦ response which shows one keycard.

One KC is enough but we need a diamond control. Our options are:
pass: 2nd round control
rdbl: 1st round control
5♥: sign off, which could be either a KC short, or a missing diamond control, or both

Partner had a diamond control so we miss a cold slam.

What about:
pass: we have enough KCs but no diamond control

[The_Badger]

Your suggestion is an alternative, Helene, but I think the big problem here is that North hasn't (I assume) got the option to splinter after your 2♠ bid. Don't think you'll miss the slam if that happens, however...

...East then proceeds to find the extraordinary lead of a small ♦

[helene_t]

Just a thought:

pass: denies diamond control. Partner can redouble to ask for the queen
rdbl: shows diamond control, asks for the queen
5♥: not enough keycards

[johnu]

How do you know what GIB thinks pass shows? Usually pass has no description? Does this auction show a description for pass?

[smerriman]

 johnu, on 2018-December-07, 06:31, said:

How do you know what GIB thinks pass shows? Usually pass has no description? Does this auction show a description for pass?

You can always see a definition of your own passes when deciding what to bid. Just not what passes mean by other players.

But Helene, surely if you don't have a diamond control, you cue 4♠ rather than 4NT. I know that doesn't normally work well with robots who don't understand cuebidding, but I would say that would be the thing worth fixing, vs trying to allow you to recover when the opponents help out with a double.

[helene_t]

 smerriman, on 2018-December-07, 14:00, said:

You can always see a definition of your own passes when deciding what to bid. Just not what passes mean by other players.

But Helene, surely if you don't have a diamond control, you cue 4♠ rather than 4NT. I know that doesn't normally work well with robots who don't understand cuebidding, but I would say that would be the thing worth fixing, vs trying to allow you to recover when the opponents help out with a double.

Yes, I could have cued instead of asking keycards. But since "pass" now denies a diamond control, apparently the GIB system does not require me to wait with blackwooding until I have verified all controls.

Given that I am now in a situation where I could have enough keycards but missing a diamond control, I think the system should allow me to bid such a hand somehow.

[smerriman]

 helene_t, on 2018-December-07, 20:20, said:

Yes, I could have cued instead of asking keycards. But since "pass" now denies a diamond control, apparently the GIB system does not require me to wait with blackwooding until I have verified all controls.

Pass doesn't deny a diamond control - it promises the king or singleton (ie no two quick losers, which is when you'd want to avoid Blackwood).

So 5♥ is a normal signoff, while your other options assume you didn't have two quick losers to start with.

[helene_t]

 smerriman, on 2018-December-07, 20:39, said:

Pass doesn't deny a diamond control - it promises the king or singleton (ie no two quick losers, which is when you'd want to avoid Blackwood).

So 5♥ is a normal signoff, while your other options assume you didn't have two quick losers to start with.

Yes, you are right. My problem was that pass and rdbl both promised a diamond control so I could only sign off.

Or bid slam, I suppose, just gambling that partner has a diamond control.

[cherdano]

 helene_t, on 2018-December-07, 05:58, said:

Just a thought:

pass: denies diamond control. Partner can redouble to ask for the queen
rdbl: shows diamond control, asks for the queen
5♥: not enough keycards

I would improves this slightly to
pass: denies diamond control. Partner signs off with no diamond control, redoubles with diamond control and no queen, other bids = diamond control, queen, and showing feature as in normal queen-ask reply


Anyway, surely GIB-East would have found the diamond underlead against 6♥?

[pigpenz]

this makes me think of the blue ribbon appeal, except its gib