Monday, May 23, 2011

1NT Direct Overcall


1.1.       1N Direct Overcall


In direct seat 1N shows 16-18 hcp (or good 15 HCP) balanced with a stopper, 15-18 hcp in 4th seat to protect against light 3rd seat openers. 1N by a passed hand shows a 2-suiter in the lower unbid suits, possibly with the lowest suit being longer (at least 4-5 in length).

 

Responses:





For 1N overcalls you’re unlikely to want to play in opener’s suit, so using transfers, a transfer to opponent’s suit is used artificially, usually as Stayman. All 2-level suit bids are transfers, with a transfer to opener’s suit being Stayman and 2♠ being a transfer to ♣ (or to ¨ over 1♣ opening with 2C then being Stayman). Overcaller completes the transfer without 4M and a minimum, bidding 2N without a 4M and a maximum.  With a maximum and a 4-card major overcaller jumps in the major, except over 1♣/1♦ opening. Over a 1♣/1♦ opening overcaller cuebids with a maximum and both 4-card majors.


2N is INV, except over a 1♣ opening where it is Minor Suit Stayman and can be passed out in 3m; bidding a major is a shortage and a game try. As 2N is otherwise engaged 2♣ Stayman over 1♣ opening is also used for balanced invites without a 4-card major.

3♣ shows both minors (except over a 1♣) and is NF. A jump cuebid (except 3♣ which is natural and preemptive) is Minor Suit Stayman. Other 3-level suit bids natural and preemptive.

Gerber is 4♣, 4♦/4♥ are Texas transfers, with a Texas transfer to opener’s suit being minor suit Stayman without slam interest or when responder is going to bid slam but needs a preference.

 

 
2♣
2♦
2♥
2♠
2N
3♣
3♦
3♥
3♠
1♣-1N
Stayman
MSS
Wk ♣
Wk ♦
Wk ♥
Wk ♠
1♦-1N
Stayman
INV
Minors NF
MSS
Wk ♥
Wk ♠
1♥-1N
Stayman
INV
Minors NF
Wk ♦
MSS
Wk ♠
1♠-1N
Stayman
INV
Minors NF
Wk ♦
Wk ♥
MSS

 

Opponents double 1N:

Pass – suggested place to play, overcaller may bid 5-card suit, pass or redouble with doubt, then responder can leave 1NXX in or bid 4-card suits up the line till at least a 4-3 fit found, possibly playing in opener’s suit.

Redouble – transfer to ♣ even after a 1♣ opening. If responder next bids 3♣ it is INV.

2♣/2♦/2♥ – transfer to above suit, even if it is opener’s suit. If responder’s next bid is a raise or 2N is INV

2♠ – natural and constructive, overcaller may compete to 3-level with a fit if pushed

2N – both minors, usually weak, but may investigate for game by bidding their short major

3 bids – natural and preemptive, with a jump cuebid having no meaning

3N – to play

Gerber is 4♣, 4♦/4♥ are Texas transfers (with a transfer to opener’s suit being minor suit Stayman usually with no slam interest)

 

If 1N gets doubled in balancing seat then:

Overcaller’s partner redoubles for SOS

Pass to play, other bids natural and non-forcing, including cue-bids

 

Opponents bid again at 2-level:

Doubles are negative, doubling then cuebidding is usually for the minors

2 level suit bids are natural and to play, even a cuebid

Transfer Lebensohl is used for 2N, 3N and 3-level suit bids

3-level cuebids are Stayman with a stopper (double without a stopper)

Gerber is 4♣, 4♦/4♥ are Texas transfers (with a Texas transfer to opener’s suit being minor suit Stayman usually with no slam interest)

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