Puzzle which should accept new answer!

There is no other solution that works for it. What other solution do you think it should have?

If there is two solutions, it is not puzzles anymore.

All recent lichess puzzles are checked by 40 million nodes per move of Stockfish. (Possibly the highest quality in any chess websites)

Almost impossible to see errors.

Still, some of them aren't really too well-suited for training purposes (the ones where a 3-move rep is involved, for example); I think all such should be discarded.

You must take with the b1 Rook, otherwise you end up down material. The puzzle is fine.