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Product Information

Objectopen the lock
DifficultyLevel 10 - Mind Boggling
BrandJean Claude Constantin
TypesEuropean Wood Puzzles, Jean Claude Constantin
Dimensions10.5 cm x 7 cm x 3 cm / 4.13 in x 2.76 in x 1.18 in

Product Description

A fascinating lock made from two contrasting wood colors. This lock doesn’t need a key to open. Instead, your task is to move the slider horizontally and pull the platform so you can open it. Over 300 moves are needed to open this sequential movement puzzle designed by the German Jean Claude Constantin.

Please note that wood colors may vary.

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Customer Reviews |

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3.8 rating

5 Reviews

Disclaimer: These reviews are written by our customers. Puzzle Master makes every attempt to keep these posts informative and relevant. If you find a post objectionable or inappropriate, please let us know by sending an email to [email protected]

    On Tuesday June 8th Max wrote,
Well constructed, fun to play with, just the kind of puzzle I enjoy. Not a level 10 though, but still a worthy addition to my collection.
    On Monday September 9th Derek wrote,
Was disappointed with this. This definitely isn't a difficulty of 10. I had it solved before the end of my car ride downtown.
    On Wednesday June 26th steve vice wrote,
the pure definition of procedural , but I wont rate it as a lvl 10 , I got it at first try in less than 5 minutes , lvl 8 or 9 would be more accurate I think.
    On Wednesday June 26th Curtis wrote,
Amazing, good but took 4 days
    On Wednesday May 23rd AJ wrote,
Fairly well constructed, though my puzzle did come assembled incorrectly. One of the layers was flipped which made the puzzle unsolvable. Luckily I was able to unscrew the pin and flip the layer around. I'd say this isn't an 8 difficulty. I'd say 5, maybe 6 if you've never done an incremental puzzle like this. There's not really a chance you'll make the wrong move, it's fairly straight forward. Still enjoyable.