Question: The tag [computer-chess](https://chess.stackexchange.com/questions/tagged/computer-chess "show questions tagged 'computer-chess'") has at the moment 4 followers and 29 questions.

It seems to me as it could be easily replaced using [engines](https://chess.stackexchange.com/questions/tagged/engines "show questions tagged 'engines'") (12 followers, 280 questions). Furthermore, [engines](https://chess.stackexchange.com/questions/tagged/engines "show questions tagged 'engines'") has [chess-computers](https://chess.stackexchange.com/questions/tagged/chess-computers "show questions tagged 'chess-computers'") as a synonym, which seems to me quite similar to [computer-chess](https://chess.stackexchange.com/questions/tagged/computer-chess "show questions tagged 'computer-chess'").

Should [computer-chess](https://chess.stackexchange.com/questions/tagged/computer-chess "show questions tagged 'computer-chess'") be deleted / marked as synonym?

Answer: 
To my mind, `computer-chess` refers to the chess games played by computers (or rather `engines` or `chess-computers` as you noted), so they are referring to slightly different things. So probably the questions should be re-tagged because one of the tags has been misused.
I noticed [computer-chess](https://chess.stackexchange.com/questions/tagged/computer-chess "show questions tagged 'computer-chess'") is frequently misused on questions about programming engines. I do not see why we need the slight distinction between games between engines and discussion about engines, as how an engine plays is an integral part of discussion about engines. I believe the tag should just be a synonym for [engines](https://chess.stackexchange.com/questions/tagged/engines "show questions tagged 'engines'") as noted in the question.