3D model of the puzzle "Impossible Ring"

The puzzle consists of two pentagonal plastic parts, two 25 mm ropes and a plastic ring. The task is to remove the ring without disassembling the structure.

Details:

• Pentagons (2 pcs.) - printed from plastic, have holes for threading the ropes.
   
• Ropes (2 pcs., 25 mm each) - flexible, connect the parts, forming loops.
   
• Ring (1 pc.) - plastic, moves along the ropes.

Principle of operation:
The ring seems locked, but with the correct movement it can be released through the loops of the ropes.

Printing and assembly:
The parts are printed separately.
The ropes are threaded through the holes of the pentagons.
The ring is inserted before fixing the ropes.
This puzzle develops logical thinking and coordination.

The solution process is shown in the photo.