A large amount of the pieces are black and all nearly the same shape. At some point it became trial and error. But, it was most definitely worth it to get such a rad end product. Probably could have finished sooner if it wasn't done in a public space where randos could come screw with it. This one is going in a frame. Doing it once is enough for a lifetime and it's way too cool to hide back in the box.
The puzzle is very difficult when it gets to a certain point. One portion is mostly black and the pieces are indistinguishable so it becomes more of a trial and error puzzle. Looks very good though.