Comments for the moves in training/opening puzzles

When I have to find the 4 best moves in an opening puzzle, I do not find everytime the solution, or I find something but I was not sure if this would be a good move.

So wouldn't it be great if good players or moderators can add comments to every move? So we can understand why this move is a good move, what the aim is etc.?

What do you think?

It functions exists on ChessTempo. I agree.

And not only the best moves should have comments, but also the wrong/bad ones. Everyone would like to know, why the choosen move is wrong. By just saying right or wrong we won't learn much. But with an explanation, why the move is good or bad will help us.

We could allow all people to make comments and then up vote or down vote the comments, so the best comments are on the top visible at first. Or just players with a certain ranking can make comments.