DeFTI - by Eitan (Now on eBay!)

pirsquared · **Posted:** Tue Sep 21, 2010 3:45 pm

Hello Twisty Puzzlers,

I am proud to present my newest puzzle creation, the DeFTI. (Short for "Deeper Face-Turning Icosahedron")

VIDEO!

AUCTION!

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File comment: DeFTI

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The DeFTI is a slightly deeper-cut FTI. All of the FT Icosahedra so far have had cuts that go through the center of the adjacent faces. The cuts on the DeFTI go through the midpoints of the adjacent edges. It's kind of hard to describe, but it's pretty clear in the pictures.

Just like the other FT Icosahedra, the DeFTI jumbles. I am not entirely sure what the angle is, but it's probably the same as the other FT Icosahedra.

I designed this puzzle on SolidWorks, printed it in WSF from Shapeways, dyed it with RIT dye, and stickered it with cubesmith vinyl material cut with my university's laser-cutter. There are 10 colors, with opposite sides stickered the same color.

I'd like to give a big thank you to Eric (gingervergo) for his help getting the tolerances right.

I will be uploading a video as soon as I make it.
The DeFTI will go up on eBay sometime later this week.

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File comment: 120 degree turn

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File comment: Prepared for a Jumble Turn

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File comment: More jumbling!

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-pi (Eitan)

ENCuber · **Joined:** Thu Dec 24, 2009 6:56 am

Awesome! That is so sweet.
Although I prefer white plastic :lol:

SHomer9 · **Posted:** Tue Sep 21, 2010 3:50 pm

Will you be offering these for sale on Shapeways, or no, because if so, I might just have to save up money to buy one.

pirsquared · **Posted:** Tue Sep 21, 2010 3:52 pm

SHomer9 wrote:

Will you be offering these for sale on Shapeways, or no, because if so, I might just have to save up money to buy one.

Same answer as on the Master Helicopter. I'm not quite ready to start selling full prints yet. For now I'm sticking to eBay.

-pi (Eitan)

Sharon · **Joined:** Fri Jul 16, 2010 8:25 pm **Location:** Israel

Great job !
this is my favorite shape (icosahedron) =P

can you show it next to a 3x3 cube? or maybe a dogic?

MonkeyZ · **Joined:** Tue Aug 11, 2009 3:59 pm **Location:** NJ

I love this! I was always a fan of FTI's and this one looks great (plus it jumbles

)

Frank Tiex · **Posted:** Tue Sep 21, 2010 3:57 pm

Absolutely amazing!
Really a wanna-have

Thaalan469 · **Joined:** Sat Jan 09, 2010 9:38 pm

Incredible!
Yes, can you show a size comparison?
...And I think that would be pretty tough to solve!

Luke · **Posted:** Tue Sep 21, 2010 4:01 pm

Wow! That's incredible. I'd love to have one!

pirsquared · **Posted:** Tue Sep 21, 2010 4:10 pm

Oops! Forgot to do a size comparison!

Here it is next to a V7. It's much smaller than you would think.

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File comment: DeFTI - Size Comparison V7

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-pi (Eitan)

DLitwin · **Posted:** Tue Sep 21, 2010 4:14 pm

Very nice! How is the movement?

Dave

Luke · **Posted:** Tue Sep 21, 2010 4:15 pm

Wow! That's tiny! How well does it move, considering the size and the amount of pieces?

Sharon · **Joined:** Fri Jul 16, 2010 8:25 pm **Location:** Israel

what is the edge length of it?

pirsquared · **Posted:** Tue Sep 21, 2010 4:24 pm

The turning is wonderful! It only rarely locks up, and when it does, it's really easy to get past it.

Sharon Avidor wrote:

what is the edge length of it?

The edges are ~42mm long. Opposite sides are ~65mm apart. It's actually so small that I wasn't able to fit my logo onto the largest sticker!

Also, remember how my FTRD's corners were able to turn in place? I was a little worried that the DeFTI's corners would turn in place as well, but they don't! I'm still not sure what to do to fix that on the FTRD, but I'm happy that it didn't happen here!

-pi (Eitan)

kastellorizo · **Posted:** Tue Sep 21, 2010 4:37 pm

It should really be named as MaFTI (Masterpiece FTI)

Pantazis

Zhewei · **Joined:** Thu Jul 01, 2010 8:38 pm

Wow, wonderful puzzle! And it's tiny!

Sigurd · **Posted:** Wed Sep 22, 2010 1:06 am

Truly incredible! I love it!

rakaCN · **Posted:** Wed Sep 22, 2010 6:43 am

It's so crazy，how to complete this puzzle

APJ · **Joined:** Sat Jul 11, 2009 1:09 pm **Location:** My House

That looks cool; when it's solved it looks like you've drawn all over it in marker pen. :lol:

Alex

pirsquared · **Posted:** Wed Sep 22, 2010 9:55 am

Thanks everyone!

APJ wrote:

...it looks like you've drawn all over it in marker pen.

"Marker pen"? I love British people. We Americans would call it either a marker or a pen. The world is a wonderful place. 8-)

-π (Eitan)

elijah · **Joined:** Sat Mar 29, 2008 12:55 am **Location:** WA, USA

oh god, this thing gets nuts! Keeping track of the cutting planes is difficult enough, but solving it, yikes!

Andreas Nortmann · **Posted:** Wed Sep 22, 2010 11:09 am

Cool!

gingervergo · **Joined:** Fri Mar 06, 2009 9:23 pm

Cool!

merlintocs · **Posted:** Wed Sep 22, 2010 12:47 pm

Fantastic.

Derek Tolley · **Joined:** Tue Feb 26, 2008 1:22 pm

Scary as hell. Love it!

quicksolver · **Joined:** Fri Feb 20, 2009 6:38 pm

There is something about these rectangular areas that just screams "shape mod" to me...any suggestions? Making them faces perhaps (would that even be possible, with the corner areas being connecting faces)? What about making this a cube? That would be one scary cube, just like this is a slightly frightening icosahedron...

bhearn · **Joined:** Tue Aug 11, 2009 2:44 pm

Very cool! Congratulations.

So now we have 2.1.1 (twice), 2.1.2, and 2.1.3 built. Also Drew's Chopasaurus (1.2.9) is, I think, equivalent to 2.1.5. This is truly the year of icosahedral twist. And they all jumble!

GuiltyBystander · **Posted:** Wed Sep 22, 2010 2:25 pm

bhearn wrote:

Very cool! Congratulations.

So now we have 2.1.1 (twice), 2.1.2, and 2.1.3 built. Also Drew's Chopasaurus (1.2.9) is, I think, equivalent to 2.1.5. This is truly the year of icosahedral twist. And they all jumble!

Don't forget Drew's Starminx III (1.2.6). I want to say it's somewhere between 2.1.4 and 2.1.5, but I can't tell for sure. There my never be a real equivalence because the shapes are too different.

@pirsquared, I can't think of anything that hasn't been said already. Very cool puzzle. I eagerly await a video.

pirsquared · **Posted:** Wed Sep 22, 2010 5:37 pm

Here's the video!

VIDEO!

-π (Eitan)

theVDude · **Posted:** Wed Sep 22, 2010 6:28 pm

It's so tiny and cute!

grigr · **Joined:** Mon Jun 30, 2008 8:38 pm **Location:** Russia

Very-Very Interest Puzzle!!!

Luke · **Posted:** Thu Sep 23, 2010 11:19 am

Wow! I watched the video this morning, and I can't believe how well it turns! In my opinion this is the best puzzle design you've made. Incredible!

pirsquared · **Posted:** Wed Sep 29, 2010 7:09 pm

Now on eBay!

AUCTION!

Happy Bidding!

-π (Eitan)

Sharon · **Joined:** Fri Jul 16, 2010 8:25 pm **Location:** Israel

first time I see the puzzle scrambled, AMAZING =P

pirsquared · **Posted:** Wed Sep 29, 2010 7:25 pm

Oh yeah! I should probably show that scrambled picture here.

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File comment: OH NO!!!

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It's actually a picture of the half that I wasn't able to solve. Everything on the side of the puzzle away from the picture was fully solved. About an hour after taking this picture, I gave up and took it apart.

-π (Eitan)

Tony Fisher · **Joined:** Sun Mar 27, 2005 7:37 pm

Amazing work.

pirsquared · **Posted:** Sun Oct 03, 2010 1:58 pm

Thanks Tony! That totally made my day!

-π (Eitan)

PuzzleMaster6262 · **Joined:** Sun Jun 13, 2010 1:00 am **Location:** Colorado

I love the way this jumbles. Great puzzle and I hope it sells for a great price

DeFTI - by Eitan (Now on eBay!)

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