|Object||Open the Lock|
|Difficulty||Level 8 - Demanding|
|Brand||Jean Claude Constantin|
|Types||European Wood Puzzles, Sliding Pieces Puzzles, Jean Claude Constantin|
An intriguing wooden lock that needs no key to open. There are four sliders that move horizontally, but they can’t move freely. You’ll need to move them in a sequential order and, as the name suggests, you need to do a minimum of 250 moves to open the lock. Invented by the prolific puzzle designer Jean Claude Constantin.
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