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William AntiRainbow (rare hand made SLS puzzle similar to Rubik's Cube 3x3x3 and Pyraminx)

William AntiRainbow (rare hand made SLS puzzle similar to Rubik's Cube 3x3x3 and Pyraminx)



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3D Printer, Oracal


I present William Kretschmer puzzle - AntiRainbow.
with the permission of William Kretschmer from his drawings I made the AntiRainbow. this is a very interesting and rare puzzle.
if your collection does not have this - it's a great chance to get a wonderful puzzle !!!

Description of the author:
The geometry of this puzzle is a strange one. At first, I tried creating a puzzle based on the geometry of the triangular orthobicupola, but doing so results in a multiple origin puzzle. I wanted a shape where the dihedral angle between two rectangles or between a rectangle and an equilateral triangle was 120°, as this allows edge pieces to be exchanged freely between these faces. The result is the shape you see here. One interesting property of this shape is that the length to width ratio of the rectangles is equal to the square root of 3, and the height of the puzzle is the same as the longer edge length of the rectangles.
I originally wanted to make this puzzle deeper cut than this, but I could not find a good way to do so without creating lots of tiny pieces, so I opted for these curvy cuts instead. As you can see in the pictures below, this puzzle jumbles, so I decided do a bit of unbandaging, which makes the rectangular faces appear symmetrical.
Those wondering where the name comes from: one other name for the triangular orthobicupola is the anticuboctahedron, since the shape is like a cuboctahedron that has been cut in half, rotated, and put back together. The rainbow cube is probably the best known cuboctahedron-shaped puzzle, but I also thought that this name was appropriate because the two puzzles otherwise have very little in common, but are both 14-sided.

puzzle on the photo and video-presentation may differ slightly from this puzzle
forum link -
youtube review video from Author -

my review video (turning demonstration) -

Edge size - , Height - , weight -
The puzzle measures 73mm tall, and weighs approximately 130 grams.


I can make and send you this puzzle after your order and payment within 30-60 days (term depends on the supplier of 3D printing).
Delivery to any country in the world with tracking number. Available Combined shipping - you can order several puzzles to get a small discount or Free Shipping.

You need to understand: this puzzle is hand-made.
The plastic is printed on 3D-Printer from SLS-nylon, completely polished and painted. Stickers are made of Oracal film.
This puzzle is different from the products in mass production from the store.
You can also play with it many times, but you must remember that this is a fragile product.
You get a fully assembled puzzle - this is an excellent specimen for the collection!

Ready to ship in

4–8 weeks



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Meet your seller

Evgeniy Grigoriev

Evgeniy Grigoriev

Owner of grigorusha

This seller usually responds within a few hours.

Shop rating

5 out of 5 stars

Total shop reviews



Stephen Jan 21, 2020

5 out of 5 stars
The stickers have been cut and applied very nicely, and the puzzle looks and turns great.

My only complaint is that I scrambled it a couple of weeks ago and still have made zero progress in solving it.. I forgot I suck at bandaged puzzles :D

Purchased item:

Roman Feb 25, 2020

5 out of 5 stars
I think it's better than you could expect from a printed puzzle. Perfect turning, perfect stickers, polished surfaces. Maybe a bit too big, but the shape makes it comfortable to play with.

Purchased item:

Stephen Jan 21, 2020

5 out of 5 stars
My first 3d printed puzzle from grigorusha, excellent build quality, and looks great in pink :D.

Deceptively tough puzzle, my solve method is currently way too complicated, hopefully I'll find a way to streamline it..

Purchased item: