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 Post subject: Bram's Square by OSKAR and BRAM
PostPosted: Sat Oct 23, 2010 6:40 am 
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Hi Twisty Puzzles fans,

Bram's Square is an idea by Bram Cohen. Take a 3x4 rectangle of which each of the 3x3 sub-squares can be rotated. Well, actually, Bram wanted a 5x6 rectangle, but even a 3x4 would already be extremely difficult to solve. The movement is slide-turn-slide-slide, repeat ...

Watch the YouTube video.
Buy the puzzle from my Shapeways Shop.
Read more at the Shapeways Forum.
Check out the photos below.

Enjoy!

Oskar
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Last edited by Oskar on Sat Oct 23, 2010 6:51 am, edited 1 time in total.

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 Post subject: Re: Bram's Square by OSKAR and BRAM
PostPosted: Sat Oct 23, 2010 6:45 am 
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Awesome! I've been wanting to see this for a while, even if it's not a 'twisty' twisty puzzle. :)

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3x3x3 average of five: 8.92 seconds.
3x3x3 average of twelve: 9.77 seconds.

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 Post subject: Re: Bram's Square by OSKAR and BRAM
PostPosted: Sat Oct 23, 2010 6:36 pm 
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Now that's something new! I love it :D
Clearly there's a potential to build other sizes. I would like to see the 5x6 rectangle, although I believe that would be a daunting task to solve.
Congratulations on both of you for this great idea.

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 Post subject: Re: Bram's Square by OSKAR and BRAM
PostPosted: Sat Oct 23, 2010 6:39 pm 
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Very nice! :D

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PB: At home (In Competition)
2x2 1.xx (2.88)
3x3 11.xx (15.81)
4x4 1:18.26 (1:24.63)
5x5 (3:00.02)
6x6 4:26.05 (6:34.68)
7x7 6:38.74 (9:48.81)
OH (35.63)

Current Goals:
7x7 sub 6:30
4x4 sub 1:10


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 Post subject: Re: Bram's Square by OSKAR and BRAM
PostPosted: Sat Oct 23, 2010 7:53 pm 
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SEBUVER wrote:
Awesome! I've been wanting to see this for a while, even if it's not a 'twisty' twisty puzzle. :)


Well that clears it up.

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 Post subject: Re: Bram's Square by OSKAR and BRAM
PostPosted: Sat Oct 23, 2010 9:56 pm 
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Great puzzle as always. I'm going to go out on a limb here and say that this puzzle is an incredible challenge to solve.

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 Post subject: Re: Bram's Square by OSKAR and BRAM
PostPosted: Sun Oct 24, 2010 6:02 am 
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gingervergo wrote:
I'm going to go out on a limb here and say that this puzzle is an incredible challenge to solve.

It certainly looks it. :D I like this even though I normally don't like flat slidy puzzles. :D

Alex

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 Post subject: Re: Bram's Square by OSKAR and BRAM
PostPosted: Sun Oct 24, 2010 8:16 am 
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Joined: Thu Aug 26, 2010 10:54 pm
Location: GD China
Too interesting and nice! I like it
I think if here can move would be better
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 Post subject: Re: Bram's Square by OSKAR and BRAM
PostPosted: Sun Oct 24, 2010 9:32 am 
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Very interesting. How long before you design a 3D version? (and don't tell me you haven't already started thinking about this, because I wouldn't believe you! :lol: )

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 Post subject: Re: Bram's Square by OSKAR and BRAM
PostPosted: Sun Oct 24, 2010 11:07 am 
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Kelvin Stott wrote:
Very interesting. How long before you design a 3D version?


A 3d version would have the first plunge be able to rotate about a central axis, or plunge far enough to do a second plunge, which would allow rotation about a different axis. And yes, I first thought about that years ago :-P It's actually easier to solve than the 2d one.

The main notable thing about this puzzle is how ridiculously hard it is, hence my suggestion of making it be a 5x6, because if you're going to be impossibly difficult, might as well go for it.

Making it 3xN for N > 4 makes the puzzle surprisingly similar to Rubik's Cube, because you can use sequences which only affect F and U on two squares which have an overlap of one column. The interesting sequence for flipping a center on the supergroup of F and U is left as an exercise to the reader.


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 Post subject: Re: Bram's Square by OSKAR and BRAM
PostPosted: Sun Oct 24, 2010 11:57 am 
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Location: bay area, california
Bram wrote:
[The main notable thing about this puzzle is how ridiculously hard it is, ... , because if you're going to be impossibly difficult, might as well go for it.


words to live by!

:)

Derek


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 Post subject: Re: Bram's Square by OSKAR and BRAM
PostPosted: Sun Oct 24, 2010 12:28 pm 
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Kelvin Stott wrote:
Very interesting. How long before you design a 3D version? (and don't tell me you haven't already started thinking about this, because I wouldn't believe you! :lol: )



wouldn't that essentially be a sliding babyface cube? still very cool and could be a fairly simple addition to a normal babyface

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 Post subject: Re: Bram's Square by OSKAR and BRAM
PostPosted: Sun Oct 24, 2010 3:13 pm 
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ulmboy556 wrote:
Kelvin Stott wrote:
Very interesting. How long before you design a 3D version? (and don't tell me you haven't already started thinking about this, because I wouldn't believe you! :lol: )

wouldn't that essentially be a sliding babyface cube? still very cool and could be a fairly simple addition to a normal babyface


No. A 3d equivalent would be a 2x2x3 where each 2x2x2 could be reoriented across the 24 orientations of a cube.


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 Post subject: Re: Bram's Square by OSKAR and BRAM
PostPosted: Sun Oct 24, 2010 3:14 pm 
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By the way, as an example of how out of control my backlog is, this was one of the first original mechanism ideas I had, back in 2004!


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