DanLock – Probably the best tricklock ever!
The first tricklock I got, and I struck gold! =)
It has some ingenious tricks! Opening the hatch is merely 1/4 of the solution. The really hard part is locking it again with the key in the shack (as seen in the picture)
It comes with a broken key as well which might prove useful. But that’s the only tools you are allowed to use. Not even the small ring holding the broken pieces in place are allowed.
You can solve the lock by sitting naked in a padded cell, with just the lock with the key in the shackle, and the broken key parts.