Nary a Problem – RecTangle - A Ternary Teaser

Nary an indecision, Nary a misstep, Nary a Problem.  The way is clear, the light is good, I have no fear, nor no one should.  

RecTangle - A Ternary Teaser was designed by Koh Pit Khiam and used by Lee Yee Dian as an exchange puzzle for the 41st International Puzzle Party (IPP).  It is a 2D sliding puzzle made from laser-cut acrylic in USA IPP appropriate colors: red, white, and blue.  The frame consists of 2 layers of white acrylic and the sliding pieces are made from blue and red acrylic.  There is also a clear acrylic panel that sits on top to hold the pieces in the frame when it is in its wrapper.  Of course, since it’s a sliding puzzle, it slides into the packaging.  

The objective is to move all 4 of the red pieces vertically from the bottom of their columns to the top.  The left three columns of the puzzle are ternary (i.e., the red piece can be in one of 3 positions), and the rightmost column is binary (2 areas for the red piece).  Advancing the red pieces vertically requires moving the blue pieces horizontally back and forth.  The 12 blue pieces could have been made using only 6 pieces but my guess is that it is more efficient to cut rectangular pieces in lieu of oddly shaped pieces and it obviously fits the theme better.

When I took the puzzle out, there appeared to be a few pieces that can be moved but the first move is obvious if you are even only a little familiar with these types of puzzles.  However, when I went to make that move, it failed to work.  Turns out that the puzzle comes with a clear acrylic spacer to keep the rightmost red piece from moving in the package.  Once it was removed, I was on my way.  With N-ary puzzles, it’s OK to do the same thing over and over again and expect a different result.  And repeat I did.  And repeat I did.  Thankfully, RecTangle only has 4 columns to demonstrate the concept without becoming tedious.

This is not a difficult puzzle and only takes a couple of minutes to solve, but it is an excellent introduction to how a ternary puzzle works.  The pieces move easily within the frame and there isn’t much danger of losing track of which direction you are moving.  In fact, there is only one path and you are either moving toward or away from the solved state.  And the best part is that you can perform the reset by simply picking up the red pieces and putting them back at the starting point – or any other point that you desire.

 

Puzzle Within A Puzzle – Lone Star Burr

Steve Nicholls’ exchange puzzle for the 41st International Puzzle Party (IPP) was a plastic sphere.  After careful inspection, the sphere was determined to be comprised of 2 hemispheres, one red and the other transparent.  Further inspection revealed other clues such as a dimple in the middle of each hemisphere and some cryptic symbology on the transparent hemisphere.  After referencing my vast collection of books on hieroglyphics, I determined that it was safe to store food in this puzzle in the UK and EU - a good indication that there might by some candy inside as a reward for solving the puzzle.  The dimples turned out to be red herrings.

Having experience in opening many of these types of puzzles acquired from numerous gumball machines over the years, I quickly solved this puzzle and separated the 2 hemispheres from each other.  Secreted betwixt them were a makeup applicator and a card displaying 2 puzzle hamsters with guns drawn ablazin’.  The back of the card indicated that the 2 cuddly gun-totin’ hamsters prefer to be referred to as brass monkeys.  Although there is no indication of pronoun preferences, I can attest that at IPP41, it was required to address Steve as Your Majesty.  And yes, kneeling and groveling was encouraged.

Just when I thought that was it, I noticed that a single hunk of plastic had fallen out of the sphere as well.  For the most part, this starry object was red, white, and blue with some yellowing at the edges.  It looked a bit puzzly, so I decided to give it a whirl.  When this lone star burrst, I ended up with a small collection of colorful little pieces, kinda like caltrops but unexplainably juicy looking.

Lone Star Burr was designed and made by Steve Nicholls and used as his exchange puzzle for IPP41.  The burr consists of 5 pieces and has a red, white, and blue Texas star on each side.  Each piece is a multicolor 3D print.  It may be all gussied up with colorful starry bits but it doesn’t change the fact that it’s still a regular dodecahedron.

When viewed assembled, the burr appears intimidating.  However, when viewing the disassembled pieces, it definitely comes across as more tractable.  Spurred on by the opportunity of an easy victory, I tackled the challenge. Indeed, some trial and error, balancing pieces, a little swearing, getting things lined up exactly where they need to be, some more swearing, starting over when subassemblies fell apart, stuffing the makeup applicator in the mouth to stymie even more swearing, and then simply sliding things back in place, produces the original shape.  I was surprised about how the final glide path doesn’t look like it would work, but everything slides smoothly together in the end.  Of course, if you don’t have everything exactly lined up, it won’t go together and you may end up with some more swearing.

Lone Star Burr can be purchased on the Two Brass Monkeys website.

What’s The Bu? – Caching Zzzzzz

News flash!  There’s a new puzzle maker in the community!

You’re not going to catch Stefan Garcia sleeping on the job.  Stefan decided that for the 41st International Puzzle Party (IPP), he was going to make his exchange puzzles himself.  Having secured a nice design from László Molnár, he embarked on the journey of 100 puzzles.  With no experience in 3D printing, Stefan bought a 3D printer, learned how to create and slice model files, and produced a fine batch of puzzles for the exchange.  And he didn’t just knock it out of the park, he launched it into space.  

To say that for a first time 3D printing effort that Caching Zzzzzz was nicely printed would be an understatement.  The ZZZZZZs are what you would expect from a 3D printed puzzle, but Stefan put in extra effort to make the frame with color changing filament and deboss the design and puzzle information on the top and bottom.  Extra touches included debossing the IPP41 logo information on one of the pillows and 3D printing the puzzle directions.

Caching Zzzzzz was designed by László Molnár and has 2 challenges.  The first is to fit all 6 Z pieces within the frame so that it makes an apparent cube.  The second challenge is to pack 4 of the Zs along with the 2 pillows within the frame to also make an apparent cube.  The frame has 4 double-voxel openings and 2 single-voxel openings, which makes it seem like there would be ample opportunity to insert the pieces within the frame.  Of course, when all the pieces are packed, these spaces need to be filled.

For the first challenge, you quickly realize that the last piece can’t simply be inserted without apparently leaving an apparent hole in the cube, which is no then longer apparent.  So apparently, there must be at least one more apparent move to complete the apparent cube.  And this is the thread that I pulled to work my way to the solution.  I found that accomplishing this exercise put me in an apparently solving frame of mind that made completing the second challenge easier than if I had simply attacked it cold as a single challenge puzzle.
 
Athough I didn’t find the puzzle extremely difficult, I wouldn’t say it ZZZZZ Z.  I’m looking forward to seeing what Stefan and László cook up for future puzzle exchanges.

 

Minima Meets Flop – Minima Flop

What happens when the Minima series crashes into the Flop series.  You get Minima Flop of course.

Minima Flop is the third puzzle in the Minima Series that I’ve solved after Minima Nest and Minima Ludique.  It was developed by Dr. Volker Latussek and make by Nothing Yet Designs.  The puzzle consists of 4 Mahogany V shaped pieces that have to be packed within a highly fenestrated frosted acrylic box.  And the windows are numerous and large enough to allow a school of red fish to flop through them.  The packaging for the puzzle is well-thought out and holds the box with 3 pieces trivially packed inside with enough space leftover to place the 4th piece on top of the box.

Minima Flop merges Dr. Latussek’s Flop series of puzzles with the Minima series started and mostly populated by Frederic Boucher.  Never having previously done a Flop puzzle, I’m assuming that it refers to how the some pieces can’t simply drop in but need to flop in.  Sorry for all these technical terms,

My experience with restricted opening packing puzzles is that the boxes are designed to add openings where needed.  Minima Flop seems to take an alternate additive approach and provides material where required to hold the pieces.  We’re accustomed to holes used to poke pieces out and offset holes to allow rotations.  Now we have extended holes that allow pieces to be flopped through them.  Before you get worked up and think that this is a spoiler, I can assure you that this is not a great revelation as the pieces you start adding to the box start flopping out within the first couple of minutes.

Solving the puzzle is simply a matter of applying drop, flop, and shift maneuvers with the four pieces to be packed in the box.  And technically, you just plop that last piece in when solving it.  If this is your first Flop puzzle like it was for me, it doesn’t take long to embrace the 1.5 voxel flop maneuver required to solve it.

I thoroughly enjoyed leveling up on the flopping skill and look forward to tackling some of the more maxima puzzles in the Flop series.

Looks Easy, There’s Just One – Hitch

Every once in a while, you run across an enticing puzzle while surfing the internet.  Ok,  maybe a little more often than every once in a while.  Maybe once a week – that I don’t run into an enticing puzzle.

This is the story of one particular puzzle called Hitch designed by Émil Áskerli.  I spied this one on the Pelikan Puzzles website and alas dear readers, it is no longer available.  It was a lovely looking puzzle in an interesting compact form.  I’m sure that you can tell from my choices of filament that the version made by Pelikan used Purpleheart and Zebrano.  

Having printed it myself, I obviously solved it as an assembly puzzle.  The pieces didn’t look that complicated and they were obviously divided by color into 2 sets of 4 pieces.  The tan pieces are identical and the purple pieces are 2 pairs of pieces that are mirror images of each other.

I expected the solution to be easy and I was moving along just fine when I developed a hitch in my gitty up.  I couldn’t see the magic.  I say magic because even when I accomplished it, I didn’t see the magic, it just happened - magically of course.  I find that as I get older, it becomes more difficult to see further down the path and I just hope that any unnoticed gaping holes in front of my feet lead to the destination.

Early on in the solving process, I figured out where all the pieces HAD to go, which is always a bittersweet moment because it is usually followed by a long tortuous period of time that is terminated with the realization that the pieces don’t really go that way.

It’s not that difficult to get 7 pieces where they need to go, but getting that last piece in eluded me for a long time.  Being noticeably more afflicted by nearsightedness as I age, I kept changing the orientation of the pieces, trying to get a configuration that could be morphed into an assembly that would accept that last piece.  And of course that last piece was not the piece that I expected.

After some time, I gave up trying to figure out how it would happen and just decided to move forward without expectations and low and behold, the path opened up and swallowed that last piece.  Whereupon, I quickly closed it up and claimed victory.  

It may be small but Hitch has nice moves and solving it is very satisfying.  Or would have been satisfying if I were able to project hypothetical movements better, or recurse multiple solution path branches faster, or maybe just simply curse better with more gusto.  Then again, maybe the pieces that I printed were just a little too tight.  Yeah that ‘s it.  The pieces were malformed, not my brain.  That’s the story that I’ll be sticking to!  

Hitch is a great puzzle.  Just make sure you get a good copy!

Panefull Puzzle – Window Packing

You will go through great panes to solve this puzzle.  Four of them to be exact.

Window Packing was designed by Koichi Miura and exchanged in this year’s International Puzzle Party (IPP) by Meiko Kimura.  The puzzle is made from laser-cut acrylic and consists of a window frame and 4 blue tetromino pieces (1-I, 1-Z, 2-L) that need to be packed into the frame.  The 2 outer layers of the frame are made with gray frosted acrylic and have 4 large openings that come in handy to manipulate the pieces within the frame.  The center layer is clear and made from 2 pieces, but I have to confess that I don’t know why it isn’t a single piece.  

You will immediately notice that the O-penings on the front of the puzzle are not the same shape as the pieces to be packed inside.  Hint -  One corner of the middle layer has a single voxel opening (2 sides) to allow the pieces to be inserted within the frame.

This puzzle is not difficult, but it’s not trivial either.  It does require the rotation of pieces within the frame.  However, it should be obvious which piece needs to go in last and that doesn’t leave too many assemblies to check.  The rotations required to get the pieces in position are not difficult and the large openings help accomplish this.
 
I found packing this window frame much more enjoyable than packing the window frame in my old storm door for the winter.  Window Packing is a good entry puzzle for 2D packing.

Octadecahedron by Another Name – Pinwheel Crystal

What was the last octadecahedron puzzle you played with?  I thought so.  You’ve never heard of one.  That’s because of the lack of publicity that octadecahedron receives.  Now if I asked you about a truncated rhombic dodecahedron puzzle, you’d all be jumping up and down shouting that you have one in your collection.  Maybe even the Pinwheel Crystal made by Dave Rossetti.  It’s all in the naming.

I’ve always wanted a puzzle made by Dave Rossetti and I finally got my wish at this year’s International Puzzle Party (IPP).  Dave’s entry in the IPP Puzzle Exchange was Pinwheel Crystal designed by Stewart Coffin.  This is a geometric shaped puzzle in the form of a rhombic dodecahedron with truncated tips.  And the interior is hollow in the shape of a rhombic dodecahedron.

The puzzle is made from Granadillo and Maple and gets its name from the nice pattern made by the contrasting colors of the woods.  The puzzle consists of 6 pieces that are used to construct the truncated rhombic dodecahedron (just roles off the tongue, not like octadecahedron at all).

I’m always amazed at the complexity of these types of geometric pieces.  My woodworking skills top out at cubic dissection constructions.  The jigs and setup up required to make the angled cuts for geometric puzzles like Pinwheel Crystal is a whole other game.

So Dave used his amazing geometrical angly cutting skills to make 24 identical pieces (12 each of Granadillo and Maple) which he separated into 6 piles of 4, sprinkled them with glue, and shook them in a bag until he had the 6 puzzly pieces with a nice finish.  A little more shaking and he had the assembled Pinwheel Crystal.  Repeat 99 times and you’re ready for the puzzle exchange.  Sounds like magic, but everything seems like magic until you know how to do it.

Pinwheel isn’t a difficult puzzle to solve but it is a very attractive puzzle and beautifully made by Dave.