Technical specifications
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61SD - Negative double - level 1
★
Responder's double after an Opp's overcall
This X (negative double) promises :
4 cards
in a non-bid major
,or minor suits if both majors have already been bid
S
W
N
E
1
1
X
A
10
9
8
A
J
9
7
7
2
9
6
5
Problem E1571
DOUBLE
a takeout double for
♥
S
W
N
E
1
2
X
K
Q
J
9
K
10
7
4
4
3
7
6
2
Problem E1574
DOUBLE
9HCP and both majors with 4 cards it's the best bid possible !
Responder's takeout double
Points necessary for a negative double raises the bidding level :
at the one level,
7-8HCP
are sufficient
at the 2 level,
8-9HCP
are necessary
at the 3 level
9-10HCP
obliged minimum
Be careful
there's no maximum point requirement for a negative double
5
J
6
3
A
Q
9
8
A
K
8
6
4
S
W
N
E
1
1
X
Q
10
8
4
A
K
9
7
7
3
9
5
2
Problem E5417
DOUBLE
Text book problem : both majors with 4 cards and 9HCP !
S
W
N
E
1
1
X
7
6
3
8
K
J
9
6
5
A
J
10
7
Problem E5143
DOUBLE
For the minor suits when the 2 majors have been bid, one by Opener and the other by the Overcaller.
Negative double is often a good defense against preempts
Think and count your points !
S
W
N
E
1
3
X
Q
J
9
7
4
4
3
A
9
3
K
10
7
Problem E4725
DOUBLE
With points to go for Game, after Opp's preempt you can bid a takeout double. (3
♠
would be Game forcing !)
The next bidding sequence
A
8
7
6
10
5
4
3
K
5
A
K
5
S
W
N
E
1
1
X
Pass
2
Pass
Pass
5
3
K
J
9
6
A
8
6
4
3
7
2
Problem E8458
PASS
After his double, South passes. Opener has shown a 1st zone hand - your team don't have the force for Game.