board burr – Puzzle Pusher

Grooved 6 Board Burr #5 – Junichi Yananose

It was about 2 years ago (holy crap where does the time go?) When I decided to work through all the Grooved 6 Board Burr puzzles available at pluredro.com

Well, I got through 4 of them in a short amount of time and then, well, I stopped working on them and got lazy with the blog. In the ensuing 2 years, I only completed 3-4 blog posts. Life got in the way and writing blog posts wasn’t high on the list of priorities. I continued to purchase and solve dozens of puzzles, but I didn’t write a thing. Sometimes it’s nice to just do a puzzle and not worry about recording my thoughts. Whatever, I’m here today and I’ve just solved the Board Burr #5.

Somewhere along the way to solving the puzzle.

Like the previous 4 Grooved 6 Board Burrs, this one has 6 boards and utilizes grooves and pegs to make unique moves and positions. The grooves make it difficult, but they also provide clues about how to solve it. One of the things that I’ve learned is that many times, getting the peg out of the groove is the trick to progressing the puzzle.

The last post got me motivated and so I dug deep into my stash of puzzles to locate #5, determined to solve it, or at least make a dent. There was a football game on the tv and all family members were occupied with their own activity, so I sat down and got to work.

The puzzle started with 2 possible entries. One of them quickly hit a dead end, so I was left with only 1 option. I methodically worked the puzzle, stopping after each move to test all the available possibilities. I tried to work through every fork in the road to determine the correct path. Often I’d feel like I was making progress only to end up with the same shape I had 6 moves ago. This thing was tricky.

I set it down a couple of times to rest, but quickly picked it back up again and reworked through the sequence again. At about a dozen or so moves in was where I found the cycle of moves that just kept looping.

One of the configurations I found along the way. This was a dozen or more moves in. And yes I’m wearing Snoopy Christmas pajama pants.

Eventually, I discovered a secret little move that changed everything. I worked through it back and forth a couple of times, but didn’t quite understand what was happening, so I decided to push on. A lot of times when solving these puzzles, I create little bookmarks in my mind. For example, about 12 moves in, I memorized the shape of the puzzle and called this A1. I’d do a bunch of moves but would return to A1. At this point I could start with the unsolved puzzle and take it to shape A1. So then, I start looking for the next bookmark, or A2. These are just things I make up, but they help me keep track of my progress.

The A2 position was tricky and I fooled around with available moves from that position for a while. Suddenly, one of the pieces was free and it nearly fell into my lap. Once again, I worked that move back and forth for a while. I’m not sure if I memorized anything, but eventually I’d had enough and wanted to move forward.

Soon thereafter, I was able to remove the 2nd piece – though it did seem to take another 10 moves. The remaining pieces were fairly trivial and just like that, I had the puzzle separated. Whew, that wasn’t as bad as I thought it might be. I remember working on this puzzle 2 years ago and got frustrated and quit. Maybe I was just burned out from the previous 4. But this time, it seemed relatively easy. I don’t know where this ranks on the list of Grooved 6 board burrs, but to me, it seemed easier that the previous 4.

These pieces are so well made. I love how clean the grooves are.

Reassembly was straightforward. I took a couple of photos for the final 3 pieces, so was able to reference those to start the assembly. Call it cheating if you want, but when puzzles get complex, I like to use photos to help with the reassembly. After getting the first 3-4 pieces together correctly, the rest felt like familiar territory. I was able to get the final piece in and the puzzle reassembled surprisingly quick.

Overall, it’s another fantastic puzzle. I’m so happy to own all these puzzles as I really do think they will hold up over time as some of the most forward thinking grooved burrs out there.

In my opinion #5 is the easiest one so far.

I still have #6 to solve and recently purchased #7 as well. I don’t know how many of these Juno will make, but I’ll keep buying them to make sure I have the complete collection. As of this writing, there are still qty:25 board burr #7s available here. While I haven’t yet start fiddling with #7, if the previous ones are any indication, #7 will be the most challenging of them all. And I stand ready to take on the challenge.

Grooved 6 Board Burr #4 – Junichi Yananose

Yay! I’m back with another board burr – This time, it’s number 4 of the 6 burr series. Thank God it’s not number 3!

This is another beautiful puzzle that utilizes Hickory and Rose Alder with pins of Bamboo. The two wood varieties achieve a nice contrast and while not exotic looking, this puzzle has a subtle beauty that is very pleasing.

This puzzle was a joy to play with. The moves are fun and satisfying. It was a bit tricky at first, although the start is very limited, the puzzle soon hits a dead end and it’s a bit difficult to figure out.

The key with this puzzle, in my opinion, is to really try to accomplish specific moves and positions. With the previous 3 board burr puzzles, I would mostly just explore every possibility with no other intention in mind. It felt impossible to actually try to solve the puzzle. Instead I was left wandering around, moving back and forth until something new opened up. With #4, I was able to determine which piece needed to come out first and was then able to strategically figure out moves to make that happen. This made it more rewarding to solve. There were even a couple of a-ha moments that really stood out.

There is one pin and groove in particular that was hidden the entire puzzle. This made things challenging, yet fun. I kept wondering why the heck certain pieces wouldn’t move as expected – turns out they were held in place by this hidden pin and groove.

I found myself a bit stuck toward the end of this puzzle – I had in fact solved it, and all I had to do was slide the piece free, but I kept searching for more. When I finally slid the piece off, I felt silly for not trying it sooner. After removing the first piece, there is still a challenge left to remove the remaining pieces.

Some interesting channels, notches and two types of pins make for some fun moves.

To me, this is a classic board burr puzzle. It’s approachable and would likely take a novice a long time to solve, but the solution isn’t terribly difficult – just keep at it and you’ll get there. Where #3 had endless pathways, dead ends and was difficult to keep track of, #4 was far more straightforward. There were some hidden moves, and a few tricks to unlock a certain piece, but overall this was a great puzzle that has given me motivation to continue with the series.

Bring on #5!

Final thought – This series is criminally underrated. There are only a few reviews online and further, a couple example have sold on the Cubicdissection marketplace for ~$60-$80 each. Perhaps board burrs are not that desirable to collectors, but these 6 Burrs stand at the top of my collection. I’ve gotten dozens of hours of very challenging puzzling out of them and they are large, heavy and well-made. What’s not to love?

Grooved 6 Board Burr #3 – Junichi Yananose

Oh boy, this one is going to be tough. I’ve been manipulating it for a casual 15 minutes and can already tell that I’m going to struggle. There are multiple paths to start with and they all seem to get complicated real quick. I’m attempting to map this thing out, but it’s going to be exceedingly difficult to keep track of the moves. It’s not simple board moves, it’s block changing multi-piece moves straight out of the gate and unless I take a photo of each move, or draw it out on paper, I’m not sure my brain can handle it. It takes something like 33 moves to get the first piece out, so I’m going to need all the luck I can get.

Ok. I think I’m making some progress. Out of the 3 beginning options, I think I’ve narrowed it down to only one path. The other 2 has multiple forks, but all came to an end within a handful of moves. That only leaves one option. Time to explore further.

Hmm. Thought I was on the right track, made it about 10 moves in, but then found another dead end, so I must have missed something. Time for bed. I’ll live to fight another day.

Day two. Stuck again after about 14 moves. This thing is tricky!

Day three, Day Four, Day Five. I’m losing a little hope here. I find myself in the familiar position of trying the same thing over and over hoping for a different result. But, as you can imagine, nothing different happens. No progress. What did I miss where is the move?

Day Six and I’ve found a new move that shifts things slightly. It seems to dead end though. The promising new move isn’t so promising after all. But it is something different, so there’s that.

One of the many complicated configurations found in this puzzle

After more tinkering, I found yet another move which allowed piece to be moved to their furtherst extend. But, maddeningly, they would not release! More tinkering and I found a way to remove the first piece! But, it requires a rotation. Juno mentions a shortcut using a rotation to remove the second piece, but I haven’t read anything about the rotation I found. Should I use this rotation or should I continue my search for the correct move. Well, I’d like to do it correctly, so no rotation for me.

OK. Officially frustrated. My careful, controlled approach is failing me. I’ve now resorted to uncontrolled fidgeting and manipulation. I’m now attempting to change the orientation of the puzzle in order to get my brain to think about different moves. I’ve traced the same moves over and over so many times that I’m now conditioned to solving the puzzle wrongly. Hopefully flipping the puzzle over, will allow me to see moves I hadn’t seen before because clearly I’m missing something.

Breakthrough!!!

This is one epic puzzle. My god. This thing is complex. I’ve finally taken the first piece out and it was completely unintentional. I had a breakthrough moment where I found a completely new path that I had never explored. I was certain that I was finally getting close, but again I found a dead end. I decided to retrace the steps to take it back to the beginning and search for a missing path. But somehow, on the path back to the beginning, I apparently found the correct path and though I thought I was going back to the start, pieces just kept moving and moves just kept appearing where they hadn’t before and I just decided to forge ahead, getting completely lost in the process. I was in awe as the puzzle moved further and further apart but still held together. My god, how can a single puzzle have so many paths?

So here I sit, with one piece out and once again, I’m stuck and can’t get any more pieces out. This puzzle is relentless!

Omg. I’m ready to break out the saw or hammer on this puzzle. I’m going to have to come back another day to try to remove the next piece. I’m just frantically moving pieces around hoping and praying that something will release. But NOOOOO. This puzzle has other ideas. Dammit Juno. How the hell did you design this diabolical thing?

I have finally done it. This has to be one of the most difficult puzzles I’ve ever disassembled. This thing is unreal. Taking out the second and even the third piece took me over an hour. It seems you have to backtrack a crazy amount of moves – pretty much back to the beginning to take yet another path to release that 2nd piece. It’s the puzzle that never ends.

In the end, I didn’t feel joy at solving this, I just felt relief.

The pieces don’t look so intimidating, but trust me, this thing is very challenging.

There is absolutely no way I would ever be able to reassemble this thing. I’ll have to resort to the burr file – which will be a first for me. But I just can’t imagine even attempting to put this back together.

In the end, I did contact Pluredro and they quickly sent out the Burr Tools file. I loaded it up and managed to put this thing back together. Even that was not easy. I’m not well versed in Burr Tools and had to spend a good amount of time going through step by step, rotating the puzzle around on the screen to make sure I had everything correct. The process confirmed, once again, that this is a very difficult puzzle.

The thoughts of solving 4,5 and 6 doesn’t sound very appealing at the moment. But, I’ve set out with a goal, so I’m going to give it the best I’ve got. Hopefully the next ones aren’t as ruthless.

Grooved 6 Board Burr #2 – Junichi Yananose

Here we go again! This time with Grooved 6 Board Burr #2

This one is supposed to be much easier than the first. We shall see!

Before we begin, I have to talk about the beauty of this thing. It’s incredible. Constructed of Bubinga and European Beech, it is much heavier than the first and in my opinion, is even better looking. The Bubinga has a wonderful wood grain throughout and it is nicely contrasted by the lighter, yellowish Beech. Also of note is the lack of visible grooves and pins. They are still in there, you just can’t see them without moving pieces around. I love this concept – the idea of creating a simple looking puzzle that hides all the intricacies internally that are only revealed through manipulation. There’s no way to plan ahead with this puzzle, you have to start solving in order to learn how to solve it. Very cool.

The description includes “..but we believe that many burr puzzle lovers can assemble the puzzle without any clue.” Challenge accepted! With the previous puzzle, I utilized stickers and photos for reassembly. This time, I’m going to give it a shot without those aids. Wish me luck!

As with the first puzzle in the series, this one is a joy to hold and manipulate. The pieces slide easily and the heavy nature of the wood makes for solid sounding “thunks” and “claps” as the pieces are pushed and pulled.

Wow. First impressions – I’m stunned. This puzzle isn’t what I expected. There seem to be numerous ‘half-moves’ involved and the puzzle quickly becomes a little loosey goosey and that makes it hard to keep track of what the heck I’m doing. I like to backtrack often in order to keep an idea of where I’m at with a puzzle, but I’m having a hard time doing that here, so I have just pushed forward.

I soon found a move where I thought that pieces would come out, but at the last second, they stopped and I wasn’t able to remove them after all. Super fun and exciting, but slightly intimidating.

After this, I once again decided to return the puzzle to the original state. The next day, I set about again and could only get about 6 or so moves in. I couldn’t seem to find the move that I completed the previous day. I became rather frustrated as I knew this move was so close, but I just couldn’t unlock it! Gahh!

Well, eventually I found it and it was again thrilling to see the pieces slide all the way to the edge without coming out. What the heck was holding it together? I reworked this move a few times and eventually discovered what I had been doing wrong. Now that I was familiar with these moves, I decided to press on again.

Pieces sliding way out! Close, but no cigar!

This led to more interesting moves – there are a number of times with this puzzle where a series of micro-moves are required. It is great fun, but hard for my brain to comprehend. At last I came to a configuration that once again felt like pieces could fall out and sure enough a piece dropped out the bottom while I was holding it. Had I solved it? Was this the intended solution?

It’s hard to say, by my count, I was only about 19 moves in and Juno’s description says 25 to get the first piece out. Hmm. So, I put the piece back in to check for more moves. Sure enough, I found a couple more of those micro-moves that allowed me to remove the first piece in a much more elegant manner. Ta Da!

Fun, Fun Fun! What a very cool puzzle. The inner workings of this puzzle are a wonder to behold! And to my surprise, 2 of the pieces were complete rings, with no grooves or pins at all! Juno has done it again!

Now, the question remains, Can I reassemble this thing without relying on my notes or photographs? I’m going to come back in a day to let the memory of the positioning and movement fade a bit and see if I can do it!

Ok, let’s see if we can do this. How hard can it be? Looking at the pieces, it is fairly obvious as to how it should go together. There’s only 2 boards that have pins. And there’s also only 2 boards that have grooves. It’s also fairly obvious which pin board goes with which groove board, so now all I have to do is actually assemble the shape.

So far, assembly isn’t going too well. I am quite sure I know which pieces fit where, but at present, they won’t go back together. I’m going to keep at it for an hour or so and see if I can make some progress, but so far, no luck.

Holy crap I did it! With enough tinkering and guesswork, I finally figured out the arrangement necessary to put it back together. I got some strange looks from my family (and dog) as I was shouting “Yes! YES! YEEESSSS!” but it was certainly worth it. Really, it wasn’t that difficult, I already knew which piece had to go together and I was pretty sure about their orientation, it was just a matter of figuring out how to get them together. In truth, the pins and channels guided the way. I extended the board pairs to their maximum – essentially putting the pins at the end of their grooves and then tried to assemble the thing. Pretty quickly I knew I was on the right track and in fact the assembly went together rather quickly from this point.

Overall, another fantastic puzzle. Definitely way easier than #1 and I’d say this puzzle is even approachable to folks who are new to puzzles.

Two down, 4 to go!

Grooved 6 Board Burr #1 – Junichi Yananose

The time is here, the mission’s clear. Today I will attempt to solve Juno’s amazing Grooved 6 Board Burr #1.

I purchased this particular puzzle way back in 2018 and have yet to solve it. I’ve toyed with it a few times, but never really put in a good effort. As Juno has continued to release more Grooved 6 Board Burr’s (6 released so far) I thought it was time to finally tackle this one. Assuming things go well, I’m going to move on and try to solve them all (yes, I’ve continued to buy them as they are released) and they’ve all remained on the shelf taunting me. Well, no more!

Burr #1 is a gorgeous piece of work. It’s made from American Cherry wood with reinforced corners made of Jarrah. The action is smooth, it’s enjoyable to hold and it’s really a wonder to behold – as are all of Juno’s puzzles.

It’s hard to imagine that this simple looking board burr contains so many possible configurations

The description of this one is intimidating. 22 moves to take out the first piece and 4246 assembly options. The big difficulty lies in the grooves and pins. There are grooves routed into many of the boards and correlating pins that travel along the grooves while moving the pieces. This groove and pin system greatly restricts the movement and adds extreme difficulty – especially in assembly. I’m not even going to attempt a blind assembly, my plan is to track all the movements and map things out so that I can reassemble after I’m done.

Let’s get started.

The puzzle is quite fun to play with. There are two moveable boards to start with, but one of these options quickly hits a dead end. The second option quickly forks to more options and once again one path leads to dead ends, while the other seems to open up more opportunities. Things really get interesting here as the boards slide around and different moves open up even further paths and though it seems like a piece might come out at any minute, I know better than to get too optimistic. These darn grooves and pins prevent the boards from sliding all the way out.

Seven moves in and I’m stuck. I felt like I was on the correct path, but this feels like a dead end. I must have missed a move somewhere. Time to backup.

Ok, now twelve moves in and stuck again. This is getting quite hard to keep track of. Instead of just one board moving at a time, it is now groups of 2 or three that seem to want to move at the same time. It’s difficult to tell whether these are individual moves or not. Sometimes I think I found a new path only to discover that all I’m doing is reversing the previous move. Things are getting tricky, but I must press on.

Jeez. 15 moves in and I’m sort of back at the beginning – except I’m not. There’s one piece that is now out of place. I’m not sure if this is the correct path or if I’m just circling round and round doing the same moves.

It has just dawned on me that I have no idea what I’m doing. There are pins and grooves and I can see exit points in the grooves, but I’m not really trying to put a specific piece in a specific place, rather, I’m just blindly going down every path possible, hoping that I’ll eventually find the solution. I really don’t know any other way to solve this beast. But I’m currently about 18 moves in and so the end should be near. However, I could be way off on the 18 move thing. Doubt is creeping in as I hit another dead end and have to back up a couple of moves and try a different path.

Not easy to keep track of the moves at this point. Am I progressing forward or just circling around and around?

Aaaand. I need a break. By my count, I’ve completed 32 moves and haven’t removed a piece, so clearly I’m repeating moves and circling around. I’m having a hard time keeping track of what moves take me forward and what moves return me to a previous state. This thing is not easy. There seem to be countless dead ends and the pieces have to be positioned perfectly before moving forward. The puzzle allows you to move forward, but if the pins aren’t in the correct position it just leads to a dead end. This is very tricky indeed and after a solid hour of concentrated focus, I’m going to rest on it and give it another go tomorrow.

Next day and I’m back at it. I’ve taken the puzzle back to the start and am working my way back through the sequence very slowly and carefully, looking for every possible path forward. I’ve clearly missed something along the way and I intend to find it. I also re-read Kevin’s blog post about this puzzle where he specifically says “The true pathway was quite an early divergence from that initial path.” This helpful hint also influenced me to start over and look more carefully.

Ouch. This puzzle has spanked me again! Another fruitless half hour gone as I get more confused. I really thought I’d be able to solve this a little quicker, but I guess not.

And after another hour or so of tinkering, I finally found the move! Wow. I’ve done it. The puzzle has been disassembled. Whew, that was amazing! This truly is a devilish puzzle. I’m amazed at how many deep dead ends there are. Most puzzles that I’ve worked on have much shallower dead ends – it quickly becomes obvious that you are down the wrong path. But, not this puzzle. There are still multiple forks available within the dead end that causes you to keep tinkering, to keep believing that you are right, when in reality, you are dead wrong and the only way to find the real solution is to backtrack 10 moves almost all the way to the beginning. Wow. Just wow.

Yay! I’ve disassembled the puzzle. What an amazing feeling!

I don’t know if I stand any chance of putting this back together. I took dozens of photographs to attempt to keep track of those final moves, but I’m feeling doubtful. Even after the first piece was removed, it still took me a good amount of time to figure out the next piece and it still didn’t get much easier. The final few pieces were stubbornly difficult to remove as well.

In the end, I managed to get it back together without using burr tools. To me, that’s a success. I may have used photos and my written notes, but ultimately, it went back together. It was tricky as there were some moves that I hadn’t tracked very well, but ultimately, I had enough clues to make it work. Whew. I’m exhausted! The bolt of adrenaline from solving the puzzle coupled with the extreme focus required to hold everything together and the mental gymnastics to decipher my notes has left me ready for a nap.

Notes on the page, colored stickers and coffee are essential ingredients for a difficult solve.

Colored stickers make it easier to identify moves and keep track of what’s what.

Overall, I’m beyond thrilled with this puzzle. It may have taken me 3 years to get it done, but it was well worth it and I will display this one proudly on the shelf. This is truly a masterpiece. Now the only question that remains: Will the other 5 grooved board burrs live up to this one?