Main     Bidding Guide 2Z12 by Richard Pavlicek    

Coping with Interference

When your side opens with any one-bid and
an opponent overcalls or doubles

After a Suit Opening and a Suit Overcall

West
1 D
North
1 S
East
 ? 
South

With 5+ cards in enemy suit
any strengthpass 1
After a major opening with 3+ trumps
6-10 pointsraise to 2N
11-12 pointsraise to 3I
13+ pointsbid unbid suit 2F
With a balanced hand and a stopper 3
7-10 HCPbid 1 NT (if possible)N
10-12 HCPbid 2 NTI
13-16 HCPbid 3 NTN
With a 4+ card unbid suit
7+ pointsdouble (if appropriate)
6-10 pointsbid suit at 1 level 4F
11+ pointsbid suit at cheapest levelF
After a minor with 5+ trumps or at least Q-x-x-x
6-10 pointsraise to 2N
11-12 pointsraise to 3I
13+ pointsbid unbid minor 2F

1 Commonly called a “trap pass,” this assumes you are playing negative doubles (topic follows). At the 2 level or higher you may trap pass with 4 good cards in the enemy suit.

2 This usually shows 4+ cards, but it may be bid with 3 cards as a waiting bid. Alternatively you may cue-bid the enemy suit, after which all bids below game are forcing.

3 Usually no unbid 4 card major.

4 With 9 or 10 points and a good 5+ card suit you may bid your suit at the 2 level rather than pass.

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Requirements for a Negative Double

West
1 C
North
1 S
East
 ? 
South

An aid to finding a major-suit fit
After partner opens one of a suit, and an opponent overcalls in a suit (through 4 D), a double is not for penalty but shows 7+ points and 4+ cards in an unbid major suit.
If both majors are unbid
Double promises only one major except on the specific sequence, 1 C 1 D, double shows both (at least 4-4) since you can bid 1 H or 1 S with just one.
If both majors are bid
Double shows both minor suits (at least 4-4).

Rebids by Opener after a Negative Double

West
1 C
 ? 
North
1 S
East
Dbl
South
P

Choose the best contract
Opener should try to choose the best trump suit or notrump, similar to normal rebidding style, based on the information revealed by the double.
Indicate your strength as follows
13-15 pointsminimum bidN
16-18 pointsjump bidI
19+ pointscue-bid enemy suit 5F

Rebids by Responder after a Negative Double

West
1 C
2 C
North
1 S
P
East
Dbl
 ? 
South
P

No need to bid
Responder is not required to bid unless forced by a cue-bid. Assuming opener has indicated a hand in the minimum range (13-15):
Indicate your strength as follows
7-10 pointspass or bid 2 of suitN
11-12 points2 NT or raise to 3I
13+ pointscue-bid enemy suit 5F

5 Optionally, bid game directly if sure of the best contract.

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After a Suit Opening and a Takeout Double

West
1 D
North
Dbl
East
 ? 
South

With 10+ HCP or 11+ points
any handredouble
After a major opening with 3+ trumps
6-10 pointsraise to 2 6N
With a balanced hand 3
6-9 HCPbid 1 NTN
With a 4+ card unbid suit
6-10 pointsbid suit at cheapest level 7N
After a minor with 5+ trumps or at least Q-x-x-x
6-10 pointsraise to 2 6N

6 With 8-10 points you may instead raise to 3 if your trump support is exceptionally good.

7 Suit must be 6+ or a good 5 cards to bid at the 2 level.

After a Suit Opening and a One-Notrump Overcall

West
1 S
North
1 NT
East
 ? 
South

With 10+ HCP or 11+ points
any handdouble (penalty)
After a major opening with 3+ trumps
6-10 pointsraise to 2 6N
With a 6+ or good 5 card unbid suit
6-10 pointsbid suit at 2 levelN
After a minor with 5+ trumps or at least Q-x-x-x
6-10 pointsraise to 2 6N

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Rebids by Opener after Interference

West
1 C
 ? 
North
P
East
1 S
South
2 D

General guidelines
If your right-hand opponent bids over partner’s bid, make the same rebid you would have made without interference if possible. If the bidding is too high, or if unhappy with your hand, just pass; partner has another turn. Also, be alert to double (penalty) with 4 good cards in the enemy suit.

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After a One-Notrump Opening and a Suit Overcall

West
1 NT
North
2 H
East
 ? 
South

With 4+ cards in enemy suit
7+ pointsdouble (penalty)
With an unbid 4 card major
9+ pointscue-bid enemy suit 8F
With a 5+ card unbid suit
5-8 pointsbid suit at cheapest levelN
9+ pointsjump in suit 9F
With any other hand
7-8 HCPbid 2 NTN
9-14 HCPbid 3 NTS

8 This replaces the Stayman 2 C bid. Opener must bid an unbid 4 card major if he has one; else 3 NT.

9 Jump bids to the 4 level are unique: 4 C is Gerber, 4 D requires 7+ cards, and 4 H or 4 S requires 6+ cards (sign-off). If a jump bid is inappropriate, you may instead cue-bid the enemy suit or gamble on 3 NT.

After a One-Notrump Opening and a Double

West
1 NT
North
Dbl
East
 ? 
South

With 7+ HCP or 8+ points
any handredouble
With any 5+ card suit
1-7 pointsbid 2 of that suit 0S

0 The Stayman 2 C bid does not apply over a double.

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© 2013 Richard Pavlicek