> If you’re expecting some really smart solution to this problem, I’m sorry to disappoint but my solution is the most un-smart of all. Each piece that needed to move was in its own grid, and all the grids were stacked on top of each other with positioning.

Yeah, definitely a weird and complicated way to solve the problem. Much simpler to just use absolute positions for the pieces and a grid or background image for the board.

It's really important to view this in Firefox otherwise you won't see what it's supposed to look like!