In a 2d, rectangular puzzle, with boring die-cut pieces, you have only 4 corner pieces. :-) Puzzles at higher difficulties are not rectangular, don't have stra

In a 2d, rectangular puzzle, with boring die-cut pieces, you have only 4 corner pieces. :-) Puzzles at higher difficulties are not rectangular, don't have straight sides, or have straight & corner-looking pieces in the middle. My favorite difficult puzzles are Stumpcraft -- this small business makes wooden, beautiful smelling puzzles with a laser-cutting technique. They're very difficult with intricate and intentionally misleading pieces and geometries. https://www.stumpcraft.com/ https://www.stumpcraft.com/