How to solve a jigsaw puzzle fast

“The difficulty of a jigsaw puzzle – and the time it will take to assemble it – is directly proportional to the number of pieces,” says Alvarez-Ossorio. In addition, there are two factors that account for the difficulty of a jigsaw puzzle, says Alvarez-Ossorio. First, he says is the “morphology of the pieces, which depends on the manufacturer and the die used (the more you distinguish some pieces from others, the easier),” and second is “the contrast of the puzzle image (the greater the contrast, the more diversity of colours and strokes more defined, the easier and faster the assembly).”