Hello, one puzzle.

Ra1 Ka1 Qa6 Kb1 Qd3 Ka1 ??

you can also try to solve my favourite puzzle:
lichess.org/editor/3B1B1B/p7/7B/8/7B/8/k1K5/8_b_-_-
white to move.
(white has forced mate in "x" moves).

...it was difficult to find solution.

@orionchess White can't possibly win that one. I think you made the puzzle wrong

puzzle is absolutely right, but too difficult.
I've found solution after 2 hours of thinking

Ah I see, you force him to move his pawn and block the king! That's a great one :D

Just turn on your chess engine and solve it :D

Mikhail04, even Stockfish Al Level 8 can't solve it. :D

Cool puzzles. If you have more of them, I am interested :)

#17 Stockfish AI 8 is limited depth 12.

It has to be less then 17 moves to mate?
Or maybe I did something wrong :S