The 5 L Puzzle (or 5 L-Box) is a classic geometric packing challenge that looks deceptively simple but is famously difficult.

Here is a short description:

• Components: It consists of a small square wooden frame and 5 identical L-shaped pieces. Each piece is made of three connected square segments.
• The Goal: You must fit all five "L" pieces into the square frame so they lie completely flat.
• The Difficulty: It is rated as a high-level difficulty puzzle. The challenge lies in the fact that the pieces take up most of the area, leaving very little "empty" space, which forces a very specific and non-obvious orientation.
• Puzzle Type: It is a packing puzzle designed to test your spatial reasoning and patience.