is this some kind of a puzzle?

a friend gave it to me ±15 years ago. He thought it was impossible to get the ring out. Maybe it's faulty and they cut the rope shorter than they should have.

We don't know what this is 🤷

a baby toy?

118 points · 20 comments · view on lemmy.world

20 Comments

TabbsTheBat@pawb.social · 78 pts · 141d

https://www.puzzlemaster.ca/solutions/1717-3d-string-puzzle-model-y

Ring and rope puzzle. Tons of models of these, though this one apparently has a pretty high difficulty rating

bjoern_tantau@swg-empire.de · 39 pts · 141d (1 reply)

Knowing these you'll probably have to thread the ring through the slit at least once.

I bet the real trouble will be once you solve it remembering how you did it and getting the ring back on.

zout@fedia.io · 3 pts · 141d

Not just the ring, also the disc.

Edit: I'm not good at visualising, but it looks like mive the ring to the left over the slit, put the disc through the slit and then move the ring back.

Second edit: probably not.

postman@literature.cafe · 28 pts · 141d

Disentanglement Puzzle

Disentanglement or Tavern Puzzle

neidu3@sh.itjust.works · 15 pts · 141d

Yes, it's a puzzle. The aim is to get the ring off. Had one very similar at home when I grew up.

Gladaed@feddit.org · 12 pts · 141d (3 replies)

The trick to knots is that only two kinds of them exist in 2D. The knot that is a knot and the one that isn't. To transform any knot into not a knot you only need to cross the rope through itself once. Ie cut and splice.

If you want I can give you abstract tips. But I think my hint was already close to telling you the solution.

albbi@piefed.ca · 8 pts · 141d (1 reply)

Cut the rope. Got it!

GreenKnight23@lemmy.world · 6 pts · 141d

1000003480

Etterra@discuss.online · 5 pts · 141d

Insanity it is then.

b34k@lemmy.world · 9 pts · 141d

Looks like a topological untangling puzzle.

sudoMakeUser@sh.itjust.works · 8 pts · 141d

I've got a similar one, maybe the same puzzle, that's on my desk. I've not figured it out yet.

JelleWho@lemmy.world · 7 pts · 141d

The rope does not go though the ring. This ring is loose, yes it's a puzzle

DarrinBrunner@lemmy.world · 6 pts · 141d (2 replies)

They're all variations on this (no spoiler)

https://www.youtube.com/watch?v=WA46rr6c3mo

merde@sh.itjust.works · 4 pts · 141d (1 reply)

you can spoil it. i'm tired of this thing

msfroh@lemmy.ca · 5 pts · 141d

Usually the "trick" is the fact that the ring fits through the hole.

A_Drusas@lemmy.world · 6 pts · 141d (2 replies)

I am jealous of your tatami mat possession.

merde@sh.itjust.works · 3 pts · 140d (1 reply)

:)

A_Drusas@lemmy.world · 2 pts · 138d

I think I will always fondly remember the first time I was living in Japan and I accidentally knocked a salt shaker over, right onto the floor. And I just had no idea how to get a bunch of salt out of a tatami mat. Fortunately, it didn't really matter, because it was salt, and I just left it there.

StillAlive@piefed.world · 5 pts · 141d

First one looks kinky 👀

glimse@lemmy.world · 3 pts · 141d

I tangled a puzzle from this line, forgot to fix it, and found it 20 years later. Still haven't untangled it