Online since 2002. Over 3300 puzzles, 2600 worldwide members, and 270,000 messages.

TwistyPuzzles.com Forum
 It is currently Thu Apr 17, 2014 5:16 pm

 All times are UTC - 5 hours

 Page 1 of 1 [ 9 posts ]
 Print view Previous topic | Next topic
Author Message
 Post subject: Cubic Hourglasses by BRAM & OSKARPosted: Sat Jan 12, 2013 4:07 am

Joined: Mon Nov 30, 2009 1:03 pm
Hi Non-Twisty Puzzles fans,

Cubic Hourglasses is a concept by Bram Cohen. The puzzle has four hourglass-shaped pieces, and a three-quarter-circle piece. The object is to get the latter piece from the top to the bottom. The pieces do not only slide like in a sliding block puzzle. They also turn, pivot and skew.

Buy the puzzle at my Shapeways Shop.
Read more at the Shapeways Forum.
Check out the photos below.

Enjoy!

Oskar
Attachment:

Cubic-Hourglasses---view-1.jpg [ 43.58 KiB | Viewed 1871 times ]

Attachment:

Cubic-Hourglasses---view-2.jpg [ 42.06 KiB | Viewed 1871 times ]

Attachment:

Cubic-Hourglasses---view-3.jpg [ 46.76 KiB | Viewed 1871 times ]

Attachment:

Cubic-Hourglasses---view-4.jpg [ 42.73 KiB | Viewed 1871 times ]

Attachment:

Cubic-Hourglasses---view-5.jpg [ 42.73 KiB | Viewed 1871 times ]

Attachment:

Cubic-Hourglasses---view-6.jpg [ 43.72 KiB | Viewed 1871 times ]

_________________
.

Top

 Post subject: Re: Cubic Hourglasses by BRAM & OSKARPosted: Sat Jan 12, 2013 7:07 am

Joined: Mon Mar 30, 2009 5:13 pm
Interesting idea, though I imagine trying to manipulate the parts through the cage could be quite frustrating. Solving puzzles should be limited by speed of thought rather than physical manipulation, and one of the reasons why Rubik's Cube became so popular is all the constraints were internalized. Still, I'm sure this puzzle will seed lots of new ideas in this direction.

_________________
If you want something you’ve never had, you’ve got to do something you’ve never done - Thomas Jefferson

Top

 Post subject: Re: Cubic Hourglasses by BRAM & OSKARPosted: Sat Jan 12, 2013 4:11 pm

Joined: Mon Jan 01, 2007 5:28 pm
Location: somewhere in the universe
I love the idea. Glad to see that it's in a more finished state.
Could some very small spaces inside of the cage be filled so it's a bit less wiggly?

_________________
...
3x3 29.95(lucky 28.05)
1.92 rubik's magic
My favorite animal is the Pfargtl.

Top

 Post subject: Re: Cubic Hourglasses by BRAM & OSKARPosted: Sat Jan 12, 2013 4:27 pm

Joined: Thu Dec 02, 2004 12:09 pm
Location: Missouri
Interesting puzzle and interesting shapes. Very original 3D sliding block idea. As for the question asked in the video... I would think the proof would entail counting the number of states of the puzzle and then checking rather the three-quarter-circle piece was upside down in any of them. Surely as this puzzle basically only has 5 pieces and you might even be able to treat the 4 hourglass-shaped pieces as identical I would think it must have a rather small (less then a 1000 if not less then 100) number of states.

Carl

_________________
-

Top

 Post subject: Re: Cubic Hourglasses by BRAM & OSKARPosted: Sat Jan 12, 2013 7:18 pm

Joined: Tue Jul 13, 2010 12:50 pm
VIDEO

Top

 Post subject: Re: Cubic Hourglasses by BRAM & OSKARPosted: Sat Jan 12, 2013 8:50 pm

Joined: Sat Mar 22, 2003 9:11 am
Location: Marin, CA
KelvinS wrote:
I imagine trying to manipulate the parts through the cage could be quite frustrating.

Surprisingly it isn't. Even the first prototype surprised me by being very easy to manipulate and engaging for many people despite the complexity of the movement. People find all the motions intuitive and easy to do, even though there are four of them.

I should point out that the question Oskar is asking isn't whether the corkscrew can be flipped upside down, but whether it can be flipped upside down with everything else in a solved state. The other question he didn't ask is what's the smallest number of moves which can be used to get the corkscrew to the opposite side and the faces all re-solved.

Top

 Post subject: Re: Cubic Hourglasses by BRAM & OSKARPosted: Sat Jan 12, 2013 9:53 pm

Joined: Tue Jul 13, 2010 12:50 pm
Bram, what sequence of moves can you do to flip the corkscrew piece over in the top layer? as i understand the puzzle, i don't see the piece being flipped at all.

Top

 Post subject: Re: Cubic Hourglasses by BRAM & OSKARPosted: Sun Jan 13, 2013 3:20 pm

Joined: Sat Mar 22, 2003 9:11 am
Location: Marin, CA
Arkanoid0 wrote:
Bram, what sequence of moves can you do to flip the corkscrew piece over in the top layer? as i understand the puzzle, i don't see the piece being flipped at all.

First you do a screw move, to make it so that there are two voxels of the screw on the top. Then you rotate it, so there's one. Then you do a screw the opposite way, so there are two again. Then you do a rotation to the other position where there are two, and do a final screw, and it will be back on the top but upside-down.

Top

 Post subject: Re: Cubic Hourglasses by BRAM & OSKARPosted: Wed Feb 27, 2013 3:14 am

Joined: Sat Mar 22, 2003 9:11 am
Location: Marin, CA
I posted a video demonstrating how to flip over the corkscrew and talking about the puzzle generally -

I tried to make it a reply to the original vido, but youtube appears to be borked.

Top

 Display posts from previous: All posts1 day7 days2 weeks1 month3 months6 months1 year Sort by AuthorPost timeSubject AscendingDescending
 Page 1 of 1 [ 9 posts ]

 All times are UTC - 5 hours