I think that word means something else than what you think it means. Because it does not appear in the puzzle you linked. Also, it is spelled differently.
Zwishenzug

oh ok - it popped up with that when I got to the end of the puzzle. So, I looked it up (I thought I did - lol) and it said when you don't make the obvious move straight away - which I thought the puzzle did require you to do. thanks cerebov for replying.
ZZ even has its own wikipedia page, here:
https://en.wikipedia.org/wiki/Zwischenzug
The first few examples on the page are weird. The ones in the section "Additional examples" are much better, you should check those.

I think that word means something else than what you think it means. Because it does not appear in the puzzle you linked. Also, it is spelled differently.
I mean, spelling german words is tough though

The way I’d look at that is there’s only one move it could ever be. White is so far down on material that any ‘normal’ move (even taking the bishop) leaves White completely lost. Given that the puzzle has to ‘resolve’ the position, there’s only one check worth looking at, then the second move is mate in 1, so the exercise more or less solves itself.
Hi - I like Puzzle Rush. Zwishenzugs - how do you learn to see them? I think 'Oh yeah!' once I get them wrong and have another look - but I always go for the first move - the hanging piece or whatever. What sort of check do you run through before you move that makes sure you don't miss these? I'm looking at this puzzle for example - not sure how to insert a link but it is number #565090 https://www.chess.com/puzzles/problem/565090
They call it a mate in 2. I don't know where to start to move my chess forward a bit. Many thanks. Ali