Now that a finished puzzle is in hand, it's time to present it to yourself and/or others. This is the best part!!



With the puzzle assembled as a square, rotate each of the four pieces 180 degrees and line them up together. They will fit perfectly inside the background frame, but there will be an open spot in the center. Rotate each piece 180 degrees again and the open spot will not be there. This is the baffling part to most people.



How is it possible for the four pieces to fill the background frame completely and then, when rotated, not fill the frame completely? Shouldn't the physical area be the same no matter how the pieces are arranged? These are questions that you and others may ask yourself/themselves. Of course the area is the same. It's just confuzzling!



Again, here's a short video showcasing the presentation and effect of the puzzle. Enjoy!:



