Twelve Puzzle - Level 9 - LegoNerdPuzzles - Andrew Parr

The Twelve Puzzle is a sliding tile puzzle, inspired by the classic 15 puzzle. This puzzle has three separate challenges. First, slide the tiles so the orange pieces form exactly seven complete circles. Next, slide the tiles so the blue pieces form seven complete 2x2 squares. Finally, find the arrangement of tiles so the green pieces form an unbroken circuit. You can ignore the other colors as you work on each challenge. The circle and square challenges have unique solutions, while the circuit challenge has two possible solutions.

Unlike classic sliding tile puzzles, this puzzle is built with tight tolerances. The pieces slide without twisting, resulting in very smooth and precise motion with just the right amount of resistance. This puzzle is very durable and the tiles will not fall out. The only rule is DON'T take any pieces apart!

Andrew Parr is the man behind the curtain at LegoNerdPuzzles. In addition to designing Lego puzzle boxes, he is a contributing editor for Games World of Puzzles magazine. Parr has written escape room puzzles that have been used in hundreds of cities around the world. His puzzles have also been published in various books, newspapers and magazines, and he has been interviewed on podcasts and Canada’s national radio and television networks.

• Measures: 6" long by 5" wide by 1" tall
• Designer: Andrew Parr
• Material: Lego Blocks
• Difficulty: 9/10
• Pieces: 353
• Objective: Arrange in appropriate order
• Solution provided
• None of Andrew Parr's products are endorsed by or affiliated with The Lego Group. Not suitable for young children - small pieces present a choking hazard