[paulsim]

Hi,

Is there any special treatment for opener when there is interference after Drury?

What’s the opener’s approach?
Does he have to show or deny opening values somehow?

A.- They double

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Would redouble show opening values?
2♥ would deny opening values, or on the contrary, show a sixth heart and opening values?
Pass would show or deny opening values?
Any other bid should be a game trial?

B.- They overcall at the 2 level

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C.- They overcall at the 3 level

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Thank you
Kind Regards,
Paul_S

[P_Marlowe]

Dury generates a FP seq. up to 2H.

A)
Pass and XX should tell p soemthing about clubs
2H is your weakest action
2D should show more than min, showing a 6th heart is certainly
a reasonable agreement, but it depends a bit, how light you can
open 1H, ..., if you happen a 6th heart, and are min, why did you
not open 2H

B) / C)
X should be a game try with a trump trick against their
contract, a suit bid should be a game try and show values (or what
ever game try you play), 3H should be to play

I would assume the above to be fairly standard agreements, and they are
similar to agreements, if they intervene after a

1H ... 2H

sequence from our side.

And before you ask, I dont play Drury.

[helene_t]

I am not aware of any standard theory for this, but I have some random thoughts:
- If they double, you probably want a way to say you smell blood. It could be pass or redouble. Maybe redouble is best because 2♣X is not game.
- Pass generally shows a weak hand, certainly if they bid above 2 of our suit. You may as well play pass is weak in all situations for consistency.
- In general, artificial bids like the 2♦ answer to Drury should revert to natural when opps interfere so that pass and redouble become available. However, if you play like
1♠-(p)-2♣-(x)
?
pass = weak, no extra length
redbl = I smell blood
2♥ = non-minimum, hearts may be better than spades
2♠ = minimum, extra length
then the only bid available for a non-minimum that can't force to game is 2♦, so it should probably retain that meaning.

When they bid over 2♣, I think it's ok to play dbl as penalty. It may be a bit old-fashioned but we are in a non-FP, sitting over the enemy suit, and their bid may be less than responsible since they didn't open themselves. So
1♠-(p)-2♣-(2♥)
?
pass = weak, no extra length
dbl = I smell blood
2♠ = minimum, extra length
higher bid: non-minimum, maybe not necessarily gf

Then the question what extra length means. Do you regularly open on a 4-card suit with subminimal values? Then you might consider 5 extra length, after all we should compete to 2M when we actually have an 8-card fit. And when you have only 4 it is good to allow p to find a better strain at the 2-level. OTOH, if you almost never open a 4-card suit, you can afford to define "extra length" as 6, that allows partner to compete to the 3-level if relevant. Then again, maybe you would say that you can't have a subminimum with 6 since then you would have opened at the 2-level.

[DavidKok]

I agree almost entirely with what Marlowe wrote. 2♣ is a forcing raise to 2♥, and I will use our generic competitive agreements when in a force with fit situation. In particular:

• 2♥ is the weakest bid.
  
• All other calls, including pass, show extras. Here it makes sense for 'extras' to mean 'we may still have game', though you could instead use it to coordinate the upcoming 3-over-2 or 3-over-3 decisions.
  
• I like to use all new suit bids as natural, redouble as short, and pass as 'none of the above'. But other approaches exist. This one mainly has the benefit of simplicity and working across a wide range of auctions. Note that it allocates most space to hands where further interference is most likely.
  
• In particular, this is not a Drury-specific question for me.
  
• I don't have a way to go for blood. Aiming to defend 2♣X with a known major suit fit isn't that valuable anyway.

If your third seat openings are frequently on low HCP and/or four card suits your priorities may be different, but I think you're trying to catch a unicorn by building your system to punish the opponents on this auction (especially if the third seat opening can be light - you may not have the balance of strength!).

Lastly I think the considerations whether to open 2M versus 1M in third seat are seriously underexplored, and many times people need to lean on Drury because they chose the wrong opening in the first place. But this is deeply connected to partnership style questions (though not all partnership styles are equal).

[awm]

I think this is actually a very good time to have a penalty double available. While opener could be light, he's also unlimited. Opener's RHO is coming in as a passed hand in an auction where we've already found our fit and have a good idea of our combined values, with the (potentially) strong hand behind him.

Otherwise I agree with what others have said (2M is the weakest action, when available, new suits are game try or better, etc).

[helene_t]

DavidKok, on 2025-March-17, 03:31, said:

• 2♥ is the weakest bid.
  
• All other calls, including pass, show extras. Here it makes sense for 'extras' to mean 'we may still have game', though you could instead use it to coordinate the upcoming 3-over-2 or 3-over-3 decisions.
  
• I like to use all new suit bids as natural, redouble as short, and pass as 'none of the above'. But other approaches exist. This one mainly has the benefit of simplicity and working across a wide range of auctions. Note that it allocates most space to hands where further interference is most likely.

This is nice, then their double frees up 2♦ to show whatever trials bid in diamonds you would otherwise play (for example over a simple raise).