by Paul Lavings Bridge Books & Supplies The Smolen Convention was invented by US expert Mike Smolen (1940-1992). It is an accepted part of nearly every expert’s system, and was adopted as the consensus choice in Bridge World Standard 2001, with 80% approving. The starting point is that with 5-4 in the majors and game forcing values, the responder to 1NT goes via Stayman. If opener replies 2Diamond Suit, no major, then responder jumps in the four card major:
1NT 2club suit Spade Suit K 9 8 7 5 Heart Suit A Q 7 5 Diamond Suit Q 2 club suit 6 5
2Diamond Suit 3Heart Suit  
The 3Heart Suit here is Smolen, showing fi ve spades and four hearts. Now if the partnership has a 5-3 spade fi t and finishes in 4Spade Suit the strong hand will be declarer. A secondary advantage is that the following sequences are not required as forcing and are invitational:
1NT 2Diamond Suit*    1NT 2Heart Suit*
2Heart Suit 2Spade Suit 2Spade Suit 3Heart Suit
This covers those inbetween 8 or 9 HCP hands which previously you would have to treat as either weak, 0-7 HCP, or Game Forcing, 10+ HCP. Now you don’t have to choose between underbidding or overbidding. You might also be 6-4 in the majors:
1NT   2club suit
2Diamond Suit 3Heart Suit
3NT 4club suit = 6 spades, 4 hearts, slam interest
4Diamond Suit = 6 spades, 4 hearts, no slam interest
Smolen can also be used with 5-5 in the majors:
1NT    2club suit
2Diamond Suit 4club suit = 5-5 majors, slam interest
4Diamond Suit = 5-5 majors, no slam interest
You can also play Simple Stayman and Smolen after a 2NT opening (instead of Puppet Stayman) or overcall or 2club suit : 2Diamond Suit, 2NT to good effect. The arrival of Smolen has caused many other areas of 1NT to be reviewed. Expert practice after a minor suit transfer is now quite different:
1NT   2Spade Suit* transfer to clubs
2NT= non super-accept
3club suit = super-accept
The super-accept is now the opposite, the next step is the negative, and bidding the suit is the super-accept. This way the strong hand plays the contract if the final contract is fi ve of a minor, or slam in a minor. No longer does responder transfer to a minor and then bid a major with fi ve+ -minor and four-major. Now if you transfer to a minor and then bid another suit, the second suit is a shortage:
1NT 2Spade Suit* clubs
2NT** 3Heart Suit*** **non super-accept ***singleton or void heart, slam interest
This is expert standard practice nowadays – but there would be a sizable community who still play it as natural. Probably 90% of partnerships are yet to upgrade. Opener is now able to judge their holding in responder’s shortage and make a sensibly informed decision. With a four-card major and a longer minor responder now goes via Stayman:
1NT    2club suit
2Diamond Suit 3club suit/3Diamond Suit Responder has (presumably) a four-card major and the minor
Suit bid at the three level
1NT    2club suit
2Heart Suit 3club suit/3Diamond Suit Responder has (presumably) four spades and the minor suit
Bid at the three-level, probably 5+ but responder could have only four of the minor: Spade SuitKQ65 Heart Suit72 Diamond SuitA43 club suitKQJ4 as well as: Spade SuitKQ65 Heart Suit72 Diamond SuitA4 club suitKQJ65 How about jumps when the response to Stayman is a major:
1NT 2club suit
2Heart Suit 3Spade Suit = Unspecified splinter
4club suit = Quantitative heart raise, gives the room for partner to bid 4Diamond Suit to say:
 “maybe”, I am not minimum   or 4Diamond Suit = Key Card, agreeing hearts
Smolen offers greater accuracy, and should be up there on your system card.