Dear list,

 In the following minimal example I would like to have: 
- the headings of \special in the toc, unnumbered
 - in the text, the numbers of the exercises preceded by the chapter number
 The first goal is achieved when uncommenting the two options under \setuphead,
 the latter is achieved when uncommenting only the second option. How can I realize both simultaneously ?

 Thank you in advance, 

Sytse %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% 
\definehead[special][subject]
 \setuphead[special]
 [
 % number=no, 
% incrementnumber=yes,
 ] 
\setuplist[special][]
 \definecombinedlist[content][chapter,section,special]

 \defineenumeration[exercise]
 [ text={}, way=bychapter, 
 prefix=chapter,
 ] 
 \starttext
 \placecontent
 \chapter{First chapter}
 \section{First section} 
 \special{Exercises} 
 \startexercise
 This is my first exercise
 \stopexercise
 \chapter{Second chapter}
 \special{Remaining exercises}
 \startexercise
 Second exercise
 \stopexercise
 \stoptext
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%