Oh I found it in chess.com/analysis 
Practice Chess board on Chess.com?
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Hello Chess.com community, I am curently studying one of my chess books, at instead of allways setting up the board, since Iam playing mostly online, I would like to have online chess board where I can just set up pieces as I want so I can analyse chess situation, but only what I found here on Chess.com was Explorer and that wont allow me to remove pieces and set them up by my choice. Is here on chess.com somewhere practice chess board where I can do that?
Thanks in advance, Marko