This is a packing puzzle that pursues difficulty, unexpectedness, and the beauty of the completed form.
Fit all the pieces into the frame.
Number of pieces: 4
Difficulty: 5/5
<About the Frame> This piece uses a 12-centimeter square frame, which is also used in other works. If you have already purchased other pieces or sets and do not need multiple frames, please select the "piece only" option.
