How can a 4 piece puzzle be so difficult??. All you have to do is insert them into the frame... It is a Stewart Coffin design (#217) originally called "Four Fit" but renamed by Stewart after Martin Gardner's week long efforts to solve it were in vain. Martin Gardner (1914-2010) is considered the Father of Recreational Math with perhaps the greatest puzzle mind of the 20th century. Martin called it "The finest dissection puzzle of all time".
The 1/4" thick pieces are precision laser cut and set unsolved into a floorboard base. The base measures 5.8" x 3.8"
Made in USA by Creative Crafthouse under license from Stewart Coffin. We also have available on a separate lisitng a larger, somwhat fancier version of this puzzle that comes with base and lid.
Note: This is our only puzzle where a solution is not provided, but can be obtained upon request at time of or after purchase.
Level of Difficulty: Level 5