New Tag for Learn Tactics - Gaining Tempo

There have been a few puzzles now where I felt a tag was missing, and this can best be summed up in the most recent one I have played, #41032.

Here we are playing black and we are trying to stop white from promoting the pawn on the f-file. White's bishop move to attack the king seemingly pulls that defending piece away, such that it can no longer get back to the f-file in time. Black however has a sneaky plan and can use the rook to check the king, gaining a tempo.

The problem is that the tags just don't work for this puzzle. We have:

1. Defence (well sure, but it's a little generic and we're not actually defending anything)

2. Endgame Tactics (well again a bit weak, this is not really what you'd call classic endgame tactics but it is close)

3. Hanging Piece (this is not correct, whilst the Bishop is hanging that was more of a deflection, and anyway that's what white is doing and we are playing black)

4. Vulnerable King (again sure, it is vulnerable, but again this is not really the entirety of the puzzle merely the specific way in which the tempo was gained).

The whole point of this puzzle is that Black is 1 tempo from reaching the promotion square, either from the King (which was deflected away) or the Rook. But by checking the king black gains the tempo that it needs in order to prevent the promotion. I see quite a few puzzles where the success is down to this gaining a tempo (normally from attacking a higher value piece on the way to the objective rather than a check), but there is not a "Gaining Tempo" tag. This is a key basic skill so I think that it should be added to the list.