- Level 5 - Easy
- Level 6 - Tricky
- Level 7 - Challenging
- Level 8 - Demanding
- Level 9 - Gruelling
- Level 10 - Mind Boggling
|Object||Open the Lock|
|Difficulty||Level 8 - Demanding|
|Brand||Jean Claude Constantin|
|Types||Jean Claude Constantin, European Wood Puzzles, Sliding Pieces Puzzles|
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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