Showing posts with label Pentahedron. Show all posts
Showing posts with label Pentahedron. Show all posts

Sunday, May 24, 2020

Last Two Scrambled Puzzles

The one on the right is another Pentahedron. Uranus, to be exact. I followed the instructions in my Solution Guides Pre Fall 2013 and it was super easy. Here they are:
Anti-clockwise Algorithm
RU'RU L RDRD' L cycles the bottom corners anti-clockwise.

Explanation of Algorithm
RU'RU is an EPS from DR to UR to UL. It also cycles 5 corners.
RDRD' is an EPS from UR to UD to DL. It also cycles 5 corners.
In other words the second EPS puts the edges back.
It also puts some of the corners back, resulting in a corner 3-cycle.

Clockwise Algorithm
LULU' R LD'LD R to cycle corners clockwise around the bottom.

Solution Strategy

  1. Yellow and Purple Circle Edges. At most 3 twists.
  2. Blue, White, Orange Circle Edges. At most 2 twists.
  3. Yellow and Purple Outer Edges. Use The Move.
  4. Middle Layer Outer Edges. Use The Move.
  5. Corners. Use the 10-move 3-cycles built from The Move. (The algorithms above)
The puzzle on the left above is called Rubik's Rings. I remember that I mastered it a couple summers ago when we were in Czechia. But now? I'm still trying to figure it out. When I Google Rubik's Rings I do not get this puzzle. Instead Rubik's Magic comes up. Dumb.

I finally solved it. But have I mastered it again? Far from it! I just fiddled and fiddled. Tried this and that. Finally I tried moving a ball to the other end. It messed up something else. I fixed the top and bam! It fixed the bottom as well.

Monday, July 6, 2015

Playing at the Old Park

.Kiddos running, I am sitting at an elevated triangular picnic table in the shade with a nice breeze blowing. Ahhh, this is the good life. Thank You Jesus.

On the way here Annie found a snail shell. She called it a "schnek"—at least that is what it sounded like to me. Then we saw some kind of bird in a tree. I think it is some sort of jay. Similar but different from the jays at home.

One more 3-cycle and the puzzle is solved.


We saw an interesting bird while sitting at the table. It looked like a blackbird but hopped around like a robin. 

On the way home we saw lots of little bugs crawling around. 

Both coming and going we were greeted by friendly people in the neighborhood.

Earlier... When Annie saw this puzzle below she informed me it wasn't solved yet and showed me the two pairs of edges that needed swapped. I told her I could swap them both with one twist, and then did so. She wasn't impressed. She pointed out that now the corners were messed up. :)

Eventually I got it down to one 3-cycle (pictured above) and then solved it. Then she was impressed. :)



Sunday, July 5, 2015

Saturn Pentahedron

Of the two Pentahedrons that I have this is my favorite to twist, so it got to come with me to CZ this summer. It has been a long time since I solved it, so I was surprised how quickly bits and pieces came back to me as I fiddled with it. Memories of working out a couple algorithms crept in as I looked up the solution guide I had made long ago. I am not content to be able to solve it using my guides—I want to be able to solve it without notes again.