About puzzles, the only way I think will work 100%, is that albert0bsd told me. Mine my own block with the transaction there.
I don't see the puzzle as something that can be easily solved just like that because the puzzle was created 10 years ago (if I remember correctly) and even since then no one among the smart people in the Bitcoin space has been able to solve the puzzle.
I can remember when many tech-savvy people on this forum tried to solve it and later gave up.