ACBL02R – Double: Redoubles Ward Trumbull
Apr 19, 2011
Page 1 of 2
Original Purpose
If a contract is doubled and made, the declarer’s contracted score is doubled and overtricks are scored in the 100s. If the contract is redoubled and made, the contract points are quadrupled and overtricks are scored in the multi-hundreds. Example:
Contract Made Score Overtricks
--------------------------------------------- --------------------------------------------
Contract Regular Doubled Redbled Regular DNV DVL RNV RVL
-------------- ---------- ------------- ------------ ----------- -------------- ------------
1 club/diam 20 40 80 20 100 200 200 400
300 500 600 1000
500 800 1000 1600
800 1100 1600 2200
etc. etc. etc. etc.
1 hrt/spade 30 60 120 * 30 same same
1 notrump 40 80 160 * 30 same same
* Game DNV = Doubled Not Vulnerable DVL = Doubled Vulnerable
RNV = Redoubled Not Vulnerable RVL = Redoubled Vulnerable
There are many reasons to redouble. Here are a few.
1. Sure Thing Redouble
Redouble when you’re in a game or slam contract with:
1. Super high card strength and suit length, and
2. Weird distribution with singletons and/or voids
The opponents have probably doubled on HCPs in your short suits.
2. Bluff Redouble
In a competitive auction, if you get doubled, a frequently used bluff is to redouble.
At non-vulnerable, you are only gambling 100 points on going set one trick.
Usually, the opponents will pull the redouble back to their suit.
ACBL02R – Double: Redoubles April 19, 2011
Page 2 of 2
3. S O S Redouble
If you are doubled by your LHO at the one level in a poor/short minor suit and the
bid has been passed around to you, redouble for partner to bail you out. Note that
RHO is probably loaded in your suit. The same is true for a doubled one notrump
when the bid is dying out.
4. Responder’s 10/11Redouble
A standard bidding technique (which I admit I don’t use enough) is for the responder
to redouble when partner’s opening bid has been doubled.
The redouble indicates:
1. 10 or 11 HCP (with 12 – 15 HCP bid 2 notrump)
2. No 4 cards in any unbid major
3. Can’t support partner’s opening suit
This is much better than responding at the 2 level with a minor suit.
5. Kock-Werner Redouble
Redouble when your partner’s overcall has been doubled, and you have a singleton
or void in his/her suit. This redouble has three advantages:
1. The bidding level remains the same.
2. Partner is informed of the possible misfit and can bid a secondary suit.
3. It keeps you from offering another suit in which partner may have a
singleton or void.
Redouble when partner’s opening weak 2 bid is doubled, and you have a singleton
or void in his/her suit. For the same three reasons above.