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 Post subject: Simple idea for a 3x3x4Posted: Fri Jun 22, 2007 6:19 pm

Joined: Tue Sep 26, 2006 6:00 am
Location: Shanghai, China
With some plastic sheet (epoxy, etc.) and a 4x4x4 (Eastsheen or Rubik's), I believe it is possible to make a simple 3x3x4. Unfortunately, the same cannot be applied to make a 3x4x4. Each cubie is eight times the size of a cubie from the 4x4 you're using.

Now, if your plastic sheet is thin enough (depending on which size 4x4x4 you use, this thickness changes), you don't need to truncate the original 4x4x4 at all. Unless your sheet is a block, the most you'll need to cut is a bit off the corners. The second and third layers are made by extending out one cubie and putting plastic sheet around the outside. The extension is hollow so it allows the corner piece to slide behind it. My explanation is so awfully unclear, I'll just post a diagram.

The solid red part is to strengthen the bond.

Will this be stable enough?

 Attachments: 3x3x4.PNG [ 5.9 KiB | Viewed 2168 times ]

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[02:25] <fusion> does look ahead on a 3x3 make someone faster?
[02:25] <Swordsman_Kirby> Yes.
[02:25] <fusion> maybe i should try that
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 Post subject: Posted: Fri Jun 22, 2007 7:45 pm

Joined: Tue Jun 13, 2006 1:38 pm
Location: So. California
I've this exact idea for a long time now. In fact, I'm in the middle of building one. I've delayed it for a long time. I'll attach my version, with rounded layers and solid pieces.

I'll probably make a guide for this puzzle, like I do for all my puzzles.

Caleb Lau

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 Post subject: Posted: Fri Jun 22, 2007 9:06 pm

Joined: Tue Sep 26, 2006 6:00 am
Location: Shanghai, China
Ah, nice!

Having solid pieces, from what I see, would call for fragile corners, as you'd have to round them off. I'd like to see the final product, though.

Imagine if someone made a 3x3x5 with a similar, but slightly more complex variant of this method.

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[02:25] <fusion> does look ahead on a 3x3 make someone faster?
[02:25] <Swordsman_Kirby> Yes.
[02:25] <fusion> maybe i should try that

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 Post subject: Posted: Fri Jun 22, 2007 9:17 pm

Joined: Sat Jan 22, 2005 12:12 pm
Location: NY, USA
You mean, from a 5x5x5? I don't think that would work very well. The upper layer corners would be very fragile.

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 Post subject: Posted: Fri Jun 22, 2007 10:03 pm

Joined: Tue Oct 09, 2001 6:14 am
Location: Orange County, CA, USA
http://puzzle-shop.de/tony-335.html

See the link for Tony Fisher's 3x3x5 from 2004. It's an Eastsheen 5x5x5 with prosthetics.

Come to think of it, the term "prosthetics" isn't particularly pleasant sounding.

It's an Eastsheen 5x5x5 with extensions.

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 Post subject: Posted: Fri Jun 22, 2007 10:25 pm

Joined: Tue Oct 09, 2001 6:14 am
Location: Orange County, CA, USA
Hmmm... Well now, that would be a bug...

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 Post subject: Posted: Thu Jul 05, 2007 11:36 am

Joined: Thu Jan 24, 2002 1:10 am
Fixed! I've updated the account for the above post for you, Jin.

Sandy

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 Post subject: Posted: Thu Jul 05, 2007 9:55 pm

Joined: Tue Sep 26, 2006 6:00 am
Location: Shanghai, China
Jin, how big is the puzzle?

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[02:25] <fusion> does look ahead on a 3x3 make someone faster?
[02:25] <Swordsman_Kirby> Yes.
[02:25] <fusion> maybe i should try that

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 Post subject: Posted: Tue Jul 10, 2007 4:24 pm

Joined: Tue Oct 09, 2001 6:14 am
Location: Orange County, CA, USA
Tony Fisher's 3x3x5 has to be fit around a 60mm Eastsheen 5x5x5, so unless you want to heavily cut down the internal mechanisim and compromise alignment, the minimum dimensions of the puzzle must be 60x60x100. If you use sheets of plastic to cover up the internal puzzle and present equal sized cubies without gaps, then the external dimensions will be greater, maybe 66x66x110.

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