Problem has Problem

Puzzle : #1069840

This puzzle is terrible...

I'm not seeing any problems with this one.  In fact, I think it's a pretty cool puzzle!

I'm not seeing any errors with it... the puzzle goes through exploiting Black's weak back rank in order to win material.

We don't know black can castle or not.

If he can, the position is equal.

Ah, I missed that idea!  A very good point.  It's impossible to know if Black has castling rights unless they show us the FEN.  Thanks for the clarification.

Black has castling right simply because that is the convention for chess problems. If not, it should be indicated with the posting of the puzzle. FENs don't matter because not everyone knows how to read them.

Btw, the problem would have been correct had it been posted in this way: