A puzzle to welcome 2020. This is probably not the first Double Choco puzzle you want to solve.
You can find some easier puzzles in the puzz.link db.
Rules Dissect the grid into regions. Each region consists of a dark piece and a white piece; these pieces are connected edge-wise, and they must have the same shape, up to rotation and reflection. A piece may contain any number of clues; these give the size of the piece.