Analysis board

please make an analysis board page for four chess so I can move the pieces and look at variations. I would like to start making videos on strats

I tryed to analyse on hellochess.com with Martin0 but was not that easy (you can't take back moves)

Can you give me the link to an analysis board where I can freely move the pieces or do I have to find a partner

yeah,  analysis board is something that  is needed