Drury

After a 3rd or 4th seat major opening, a 2Club response is used to show a limit raise (10-11) and asks partner if their opening was sound or light.

Opener responds:

Over a 2Diamond rebid, responder rebids the major to signoff.

After:

1Spade 2Club
2Diamond ?

Responder can rebid 2Heart to checkback for a better 4-4 heart fit. Without a heart fit, opener returns to 2Spade