Classic Challenging 12 Parts 3D Wooden Puzzle Burr Brain Teaser Game for Adults

• Item Size: about 7*7*7 cm

• Packaging:  plastic Shrink Wrap

• Weight: about 90G

• Recommended age:  aged 6 & UP

The Twelve Sisters Puzzle is a highly complex and advanced variant of the traditional Chinese Kongming Lock (also known as a Luban Lock or Burr puzzle). Unlike standard 6-piece burr puzzles, this one significantly raises the difficulty bar.

What Makes It Special?

• Complex Structure: The puzzle is composed of 12 interlocking wooden sticks.

• High Difficulty: It's widely regarded as a "level 2" challenge and is not recommended for beginners. With 12 pieces and countless possible orientations, solving it requires a deep understanding of spatial mapping and structural engineering, rather than simple trial and error. The first solve can easily take an entire afternoon.

• Unique Geometry: Its geometry is different from classic burrs, which are built on a standard 3D vertical grid. The "Twelve Sisters" features a more complex structure where rods intersect at oblique (slanting) angles, adding to the visual and logical challenge.

The Goal

The puzzle comes assembled and is designed to be easy to take apart but notoriously difficult to put back together. The objective is to disassemble the entire structure and then reassemble the interlocking pieces. The final assembly step is often described as the most difficult part.

Historical Context

Kongming Locks are traditional Chinese puzzles that date back centuries, with origins linked to the ancient architectural technique of "sǔn mǎo" (mortise and tenon) joinery, which does not use nails or glue. They are named after the legendary strategist Zhuge Liang (Kongming) from the Three Kingdoms period. The "Twelve Sisters" represents one of the more intricate and challenging descendants of this ancient toy.