Puzzles with no kings?

Hello -- is it possible to insert a puzzle (using the 'insert position or game' button) that does not have kings?  I'd like to do a blog series on pawn breakthoughs with puzzles with/without the king.  

For example I'd like this puzzle, but no kings present:

Try it just using the FEN notation for the start position. Like this:

...

Hmm, almost ....

Can you do that as as puzzle, instead of a static graphic?

yeah weird.  It lets you create the puzzle using the FEN string, but the puzzle doesn't work!!

That was supposed to be a puzzle

I've tried a few different iterations. I don't think the puzzle logic allows it without kings on the board.

Yeah it doesn't work.

Cool! Lets make applecake without apple!

what about having a passed pawns that blocks both kings in place ? That would make the pawn break througs efficient

Thanks James.  There are certainly workarounds..one of the best is similar to what you said...advanced connected passers on the other side of the board.

It works now on v3. Not sure it will always work though.

great news!!!  Thanks for checking that, Martin.