Tricky chess puzzle (part 1)

Yes, guys! Here's an another challange for you! 

Just look at that picture! Can you find a mate in 1 for white?

Yes? Is it really a mate in 1?

Did you play pawn to d6?

No, that's not a mate in one becouse:

You see, the black can block with its pawn so that's not a mate in one move.

But checking with the knight is just a sacrifice, isn't it?

Yeah, the opponent just simly captures it.

Then what can we do?

Are there any more check for white?

Yes. And that's not just a check. Mate in one. Do you even know what was the last move of black? Just think about it...  How we can give mate in one move for the black?

Here's the answer:

Yes. The black's previous move was with its pawn. So we can take it this way. 

Did you see it? Tell me in the comments!