Could we add "opposition" in the puzzle themes?

I think it could be useful to specifically train this kind of positions.

good idea, would be a nice theme to have.

+1

Already there. I have had several where opposition was the key.

There are opposition puzzles indeed but there is no "opposition" tag, that's what I mean @sparowe14.

Why introduce a subcategory for pawn endgames? Just practice pawn endgames?

opposition is one of the most important things in pawn endgames. @Cedur216

What is opposition?

@S3026156 except there's also breakthroughs, remote pawns, square rule ... just practice all at once.

I agree with Cedur216, oppositions are really a subcategory, there should really not be a category for oppositions!