Smolen allows responder to show 5-4 or 4-5 shape in the majors after 1/2NT opening and Stayman.

W N E S

P

1N P 2♣*1 P

2♦ P 3♥*2 P

*1 Stayman

*2 SMOLEN, 4♥5♠

No Smolen after 1N opening and RHO double:

W N E S

P

1N P 2!♣*1 P

2!♦ X 3!♠* 2

*1 Stayman

*2 Natural 5♠ and 4♥

W N E S

P 2N P 3♣*1

P 3♦ X 3♠*2

*1 Stayman

*2 SMOLEN, 5♥4♠