[david_c]

You open 1♣ playing Polish Club or some similar multi-club system. LHO makes a natural suit overcall. This is passed back round to you, and you make a reopening double.

How high does their overcall have to be before your double denies the weak variant of 1♣?

For me, 2♥ feels about right (i.e. a double of 2♦ could still be weak, but a double of 2♥ should promise at least the "medium" variant). But I'd be interested to hear your opinions. It seems like this is something which is very important to agree with partner.

[david_c]

It was ages ago that I asked this question, and I'm still not sure. Anyone fancy having a go this time?

You're playing WJ05, or something like that.

(i) 1♣ : (1♠) : pass : (pass) , Dbl - can this be a minimum balanced hand?

(ii) 1♣ : (2♦) : pass : (pass) , Dbl - can this be a minimum balanced hand?

(iii) 1♣ : (2♠) : pass : (pass) , Dbl - can this be a minimum balanced hand?