Finding Major Suit Fits - Support X

Support Doubles are a useful tool for clarifying openers hand when the opponents interfere with your auction. A Support Double is a double made by the opening bidder when responder bids a suit and the opponents interfere with a simple overcall.

Examples of Support Doubles
1D-P-1H-1S--X*
1C-P-1S-2H--X*

This double shows exactly 3-card support for partners suit. It is not for penalty!
Note: If you and your partner agree to play this convention you must alert this double.

This double tells partner that you have 3-card support for him. If you have 4-card support for partner's suit you will raise directly. If you do not have support then you will pass or bid notrump. Partner will have another chance to bid if they have more to say.

Also, if you want to make a penalty double of the opponents (which you don't often want to do at such a low level) you must pass and hope that partner will reopen with a double.

Brd: 2 S A 6 5
Dlr: S H A Q 8 6 2
Vul: None D J 10 7 3

C 10
S J 9 4
S K Q 7 3 2
H J 9 5
H 7 4
D K 6
D 9 5
C Q J 9 7 4
C K 8 6 2

S 10 8

H K 10 3

D A Q 8 4 2

C A 5 3

South West North East
You
Partner
1D Pass 1H 1S
X (1) 2S 4H All pass
(1) Support Double

Contract: 4H by N