call all problem - solvers and puzzle victor : A program library in Bloomington , Indiana , is home to the world ’s only public video display of mechanical puzzler . The Jerry Slocum Mechanical Puzzle Collection can be find at Indiana University ’s Lilly Library , which also houses rarefied Quran and manuscript , includingQueen Elizabeth I ’s Great Seal and anearly printed copyof " The Star Spangled Banner . "

The collection is name after Jerry Slocum , a Chicago - area native who started donating his personal collection ofpuzzlesto the library in 2006 . The subroutine library now has over 34,000mechanical puzzles , which , unlike fretsaw and crossword puzzles , tend to feature interconnected piece that must be physically manipulated in parliamentary law to solve the trouble . There are exceptions , though . One subset of mechanical puzzle called an “ impossible mystifier ” call for no movement at all ; rather , the player must reckon out how the puzzle was built .

An onlinedatabaseof the collection let exploiter research by the teaser ’s date of introduction , clothes designer , maker , or categorization . The one-time item is a 15th - C Khmer iron whorl from Cambodia that contain trick locks and keys . But concord toIndiana State Library , puzzler were n’t always make for their amusement note value . In the second one C BCE , for example , Romano - Gaelic puzzle padlock were used strictly for security purposes . It was n’t until the nineteenth century that the puzzle emerged as a fun pastime .

Jennifer Jameson, Flickr // CC BY-NC-ND 2.0 (cropped)

In a YouTube video upload by theIndiana Daily Student , the collecting ’s curator , Andrew Rhoda , tries his hand at the “ Gear Cube Extreme , ” which looks like a Rubik ’s Cube on steroids . “ The puzzle is complicated by the add-on of gear that move at half - turn while the rest of the puzzle motion at tail - turns , ” Rhoda say in the TV .

Unless a particular piece is being conserved , visitors are encourage to grab a puzzle and start playing inside the depository library ’s reading room . “ Mechanical puzzles are really strong to empathise if you see them behind methamphetamine , ” Rhodatoldthe student news program electric receptacle in 2017 . “ you’re able to sort of understand what is go on with a mechanically skillful puzzle if you take care at it behind chicken feed and translate an exhibit label . But to really understand the estimate behind a puzzle , you have to handle it . You have to flirt with it . You have to endeavor to solve it . ”