[Stephen Tu]

1c-p-p-x;
What hand type does redouble by opener show? How strong, how many clubs, what suitability for other contracts if any?

[The_Badger]

In the absence of knowing the answer specifically - at least I am honest - I would hope to view the hand in the same vein as the auction 1NT - Pass - 2♣ - X - XX where opener is showing the willingness to play in a ♣ contract redoubled with good clubs and a maximum hand.

However, here where the opening ♣ suit could be 2+ redouble could have various meanings or agreements I feel. I still like the idea it shows 5♣ and a balanced hand in the range of 18-19HCPs.

I am interested as you Stephen how other players interpret it.

[shyams]

A while back, when I had a discussed agreement in place, our agreement was:
-- Pass: Promises 4+ {occasionally very strong 3} and willing to play 1♣x if responder can tolerate it.
-- Redouble: Shows 3, scared to play 1♣x, and asks partner to do something.

However, I think the situation never really came up.

[shyams]

duplicate

[mike777]

Stephen Tu, on 2017-July-23, 23:58, said:

1c-p-p-x;
What hand type does redouble by opener show? How strong, how many clubs, what suitability for other contracts if any?

Willing to play 1cxx...in other words both long clubs and extras.

A typical hand might look like:

void...Ax..AJTx....AQTxxxx

[wank]

Shortish clubs. 2 higher 4 card suits, presumably majors if you don't play unbal diamond.

[Zelandakh]

The traditional meaning is a maximum unbalanced opening, the correlary to a 1NT rebid for balanced hands. Whether that is the best option is another question entirely.