[Vampyr]

Zelandakh, on 2016-February-09, 17:03, said:

In addition to what CY writes about void-showing responses and singleton/void splinters, the hand with a void is too strong for a 4♥ splinter. The "one-under" splinter needs to have a fairly tight range and if you allow this hand as well as a minimum game force with a singleton, it makes for impossible problems for Opener. This is where another concept, sometimes known as maxi-splinters, comes in; but there I suspect we are getting into areas of system probably best left out of an N/B discussion.

Yes, you need a very tight range if you are going to be taking up so much room.

My preferred method is to define a splinter as having 3 or 4 controls (where an Ace is two and a King is one) and not very much in Queens and Jacks (maybe one). OR a monster that isn't going to respect a sign-off.

[Liversidge]

helene_t, on 2016-February-10, 00:59, said:

Mixed controls will get you there - a splinter followed by 5♥ shows first round control. More generally, cuein a suit twice shows first round control.

Thanks!

[Liversidge]

Vampyr, on 2016-February-10, 02:00, said:

Yes, you need a very tight range if you are going to be taking up so much room.

My preferred method is to define a splinter as having 3 or 4 controls (where an Ace is two and a King is one) and not very much in Queens and Jacks (maybe one). OR a monster that isn't going to respect a sign-off.

Made a note of this!

[billw55]

helene_t, on 2016-February-10, 00:59, said:

Mixed controls will get you there - a splinter followed by 5♥ shows first round control.

That plan won't work if opener uses keycard, which you recommended upthread.

[hrothgar]

Liversidge, on 2016-February-10, 04:03, said:

Made a note of this!

Please note, many people (myself included) prefer a style in which the splinter bidder can has to discrete ranges.

There is a weak range where it is assumed that opener will take control if slam is going to be found.
There is also a strong range where responder is willing to seize captaincy after a signoff. (As I play it, if the splinter bidder uses Blackwood, the responses are Exclusion for captain's short suit)

[helene_t]

billw55, on 2016-February-10, 13:54, said:

That plan won't work if opener uses keycard, which you recommended upthread.

True.

I didn't say it because I recommend using mixed controls on this hand, but just in reply to Liversidge who thought that mixed-controls wouldn't work on this hand.

Cyberyeti already mentioned that RKC would also get you there if you play void-showing responses.

However, both are risky. Showing a void in addition to just a single keycard can get you too high sometimes.