Have I Been Scroo'd?

Even Ice Cream Doesn't Help!

Cooby Scroo from Andreas Roever

My car when I got out of work!

Most of you are aware that there's been a bit of a heatwave in Europe recently! It started whilst I was in Italy for the IPP and then hit with a vengeance when I returned home. The UK is uniquely unprepared for high temperatures despite the fact that we have had them for the last few years. Our houses retain heat (they are built for cold winters) and it feels like hell inside (most of my house was 29-33ºC for the last week and my back garden, being south-facing reached 48ºC for long periods of time). During all of this I have been sick with the lurgy that I caught on the plane and feeling like death warmed-up! The only thing that could possibly make it worse would be to share that hellish space with a "woman of a certain age". As a result of the conditions at home, both physical and psychological, and despite being sick as a dog, I was grateful to go and work in an operating theatre with air-con bringing the temp down to 18ºC. I went from boiling sweaty hot to freezing my nuts off back to boiling again.

As a result of this my puzzling skills were even more sub-par than usual!

Nicely presented with a bag and a card

The Cooby Scroo puzzle had been Andreas Roever's exchange puzzle last year in Tokyo. It was brought to my attention at an MPP afterwards when a couple of people were showing it off and extolling the virtues of such a simple idea, so beautifully created. I even had a play with it and marvelled at the incredibly confusing movement and how it came apart easily but was impossible for me to put back together. This was going to be brilliant - tempted...

When a few people placed it in their top 3 puzzles of the year at Peter Hajek's end of year puzzle party, I broke and contacted Andreas for a copy and arranged to pick it up in Italy.

I got a choice of colours when I picked it up and chose a lovely blue, grey, black and white combo.

When I got home and having taken some photos to show off how it moves, I shied away from actually dismantling it for fear of failure yet again.

One pair moved

Second move possible and it gets scary

I showed it off at work and after getting an appropriate "Oh my God!" response. I stopped playing and put it away again. I did the two beautiful moves again and again at home, trying to make myself familiar and comfortable with the conformational changes and eventually I was holding it slightly wrong and it fell apart on me....Aargh! I should have known that would happen eventually.

This might be how it remains!

I recalled how impossible it had been for me at the MPP and I quailed at the thought of getting it back together. It is relatively easy to make pairs or even a trio of pieces:

This should do it - he hopes

This looks great but isn't helpful!

Over the last few days, in the blistering heat with an angry hot woman in the background, whilst feeling like death, I have repeatedly attempted to reassemble this bloody thing! It shouldn't be this difficult! It's only 4 pieces and has only 2 main moves but you mustn't forget how bad I am at puzzles. Yesterday evening whilst muttering to myself and considering femicide as a way to get a little relief, I suddenly managed to get it together. OMG! The relief! Did I dare take it apart again? Not straight away... I needed to relax a little and then try and redo it slowly.

Today, I can now disassemble and reassemble it to order. I can see why so many people loved it. This puzzle is an absolute masterpiece of good design. All we need is for someone to make it in wood (I guess that might be nearly impossible) or possibly make it in brass. Steve or Ali - what do you think? Maybe a collaboration with Andreas might be in order?

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Gelateria from Alexander Magyarics

Gelateria - Alexander Magyarics' exchange puzzle in Italy

During a heatwave, there is nothing better than a fabulous refreshing cool Gelato. I thought that attempting the Gelateria puzzle might be refreshing for me. Yes, I was wrong!

Alexander was a "greenhorn" at this IPP and previously they have not been allowed to exchange. This year the committee made a change to the rules and newbies were allowed to do so if they created their own design. Alexander has quite rightfully earned his place attending an IPP due to the HUGE number of amazing puzzle designs he has created over the last few years. You can tell that they are really really good when craftsmen like Brian Menold and Jakub Dvorak use the designs to produce gorgeous wood creations. I have reviewed quite a lot of his designs over the last few years and it was simply amazing to meet him in the flesh after such a long time. Unfortunately, we were both so busy that we didn't really have much time to chat and properly catch up. Whilst I was assisting Jerry Loo in his exchange, I saw Alexander's puzzle and decided that it looked a lot of fun and determined to obtain a copy at the main puzzle party the following day. 

Just a few challenges!

Alexander is a "completionist" - he finds a simple design, modifies it to add extra complexity and then looks for as many associated challenges as possible. I have quite a lot of these in my collection and I am absolutely terrible at solving them. Maybe this would be better? It is at its heart a tetromino tray packing puzzle. We have all played with these as kids - I know I used to play with one belonging to my older cousin when I was about 8 - I loved it. The 5x8 voxel tray can be fitted with 10 tetrominoes in many ways - that is easy. Alexander has created a LOT of challenges (the sheet has 48!) to decrease the options and make it MUCH tougher. The tray has holes in it and you re provided with a set of black blockers that can be inserted into it. The tetrominoes are now restricted where they can be placed because they must straddle the blocker. To get you used to it, he gives a couple of challenges with 8 solutions, 3 with 4, 1 with 3 and 9 with 2. All the rest have just 1 possible solution. 

8 possible solutions - easy?

Hell, NO!

I also took this to work and during a rather long boring orthopaedic operation (after 4 hours and no end in sight, I needed something else to think about), Colin and I set to work on one of the 8 solution challenges. 

This is really REALLY difficult! Neither of us were able to solve it in about an hour of attempts. I have been trying at home in the heat and still cannot get it. I need a way to think about these challenges. There must be a logical way to work it out but I am seriously struggling to get my little bwain around it. 

I appear to have Scroo'd by Alexander as well! Maybe I need another hobby? Whack! Ouch!

If you get a chance to buy a copy then you should absolutely do so. There are so many challenges and they are so approachable even if they are impossible. Alexander's puzzles are sold by PuzzleMaster, by Tye Stahly and possibly by Alexander himself via Facebook or Instagram. Drop him a line. He is delightful to chat to and his puzzles are amazing. 

I have not yet tried the One Way or Another puzzle which won a Jury honourable mention prize in the IPP design competition. That is quite a feat!

This Minima Is NOT Minimal

Minima Tokyo aka Jammed Coin - Tom and Team are BACK!

Minima Tokyo aka Jammed Coin from Frederic Boucher and Ars Aenigma

I'm back from the IPP recently held in Assisi, Italy and, as expected, promptly caught the lurgy in the airport and have been sneezing and spluttering for a few days. I'm rather sleep-deprived because Mrs S says it's like sleeping next to a swamp monster and she keeps punching me in the ribs to stop the awful gurgling and swallowing noises. Now, there's an image you didn't need! I had an incredible time catching up with old and new friends. Some of them I have communicated with for ages but never actually met. I did manage to buy one or two new toys and was delighted to be given a few as gifts as well. Mrs S asked whether I had many to bring back and I admitted to a few but didn't tell her how many for fear of murder. It is customary to take a photo of your haul before travelling home, and I managed to take this pic (only to realise that there are one or two more that were not included)

Don't tell her about this lot!

Today is a review of the Jammed Coin/Minima Tokyo that won a "top ten vote getter" award at the IPP.

When Tye offered Frederic Boucher's latest sequential discovery Minima puzzle up for sale last year (he had taken it to the Tokyo IPP), I jumped at the chance and received it in November. I hadn't actually realised that this had been produced by Tom Messina and his team at Ars Aenigma (they have begun producing again after their incredible mentor, Eric Fuller, died). I had actually been expecting this to be one of Tye's incredible creations like the Jammed Gem Again, but when it arrived I saw that it had been created from beautiful wood and was blown away by the quality. I still have Eric's Jammed Gem in my pile of puzzles to solve as I have not managed to even find the first move! All of these designs by Frederic are incredible challenges.

The Minima Tokyo/Jammed coin is a typical Minima puzzle having a 2x2x3 box with various openings and several pieces inside. But, different to usual, the aim is not to pack it, the aim is to remove the coin from where it is held captive, sandwiched inside a single cubie. Having admired it for a while, I set to trying to solve it before Xmas last year and delightedly performed the obvious first steps - unscrew the bold in one face which allows a domino piece to be removed. From this, a rod can be removed, and the remaining pieces now slide around inside the box.

First piece out and coin revealed

At this point you can properly admire the beautiful workmanship from Tom. The box is absolutely perfect, made from Walnut and Maple, and the internal pieces are a very vibrant Padauk. There remains three pieces captive inside, and they are able to slide about. One can even rotate. 

Here I got stuck! Just 3 moves in and I could get no further. I read Allard's review repeatedly in the hope that he might have given something away, but there's not even a vague clue there. After 5 months of attempting nothing new, I spoke to Allard about it at the last MPP and all he would say was that Tom was carrying on Eric's amazing tricks. Well that was singularly unhelpful. Every week or so I would pick it up from my desk and have another look. Nothing ever changed. I do know a few of Eric's tricks and tried to find something familiar inside the box, but nope, nothing, nada, nyet.

This puzzle was actually entered in the IPP design competition this year and was available for everyone to play with. The solution was there as well, but I was very careful not to look at it or to watch others solve it. At one point I did look up and saw someone with a LOT of pieces. This renewed my determination to solve the damned thing! It's such a shame that I'm rubbish at puzzles!

A few days ago, I restarted and did my usual few moves. At this point I got my torch and magnifying glass out and had a look at what I had. I did notice one anomaly that gave me a small clue of what might be needed. After a bit of fiddling in a way that I hadn't done before, I suddenly made a huge discovery. Another piece or two came out with a rather fancy move. YESSSSS! Except I was stuck again. But now I knew the kind of things that might be needed. The next move occurred in an unexpected direction to reveal the true woodworking mastery of Tom and team. Amazing! 

After those first well-hidden moves, the sequence continued with a series of tools and working out how to use them. The discoveries come quickly, and each step leads to another after a bit of thought. The Aha! moments are wonderful before the final tool is found to release the coin from its prison. Amazing!

Coin is now un-jammed.

I doubt whether these will be released again, so you should keep an eye on the various auction sites. Frederic has done it again, designing an incredible puzzle, and teaming up with Ars Aenigma is absolutely perfect - it's only fitting that Eric's protégés continue his legacy. Thank you, Tye for the opportunity. I hope that you enjoyed the gift puzzles that I sent back from IPP for you. 

IPP Madness! How To Upset The Wife!

There’s not going to be a review today. I’m in Italy at the international Puzzle Party. I’ve had a fabulous time meeting friends, playing with toys, eating and drinking. We started the trip with a visit to a castle in Panicale owned by Roxanne and George and now named the World Puzzle Centre. 110,000 puzzles is an overwhelmingly huge collection that even I wouldn’t want!

I did upset the present wife by sending her photos of a couple of bedrooms in the WPC and suggesting to her that we need to repeat this in our home. Needless to say, the expletives came thick and fast!

Normal service will be resumed next week….. if I’m still alive after she sees the puzzle haul!

String Or Wire? Or Both?

Should They Go On Display?

 

Concertina Wire by DDK made by Mr Gao - bought from Aaron Wang

A wonderful gift from Dale

Due to having a horrendously busy week with operations that went on and on (and on) beyond the normal working day, I haven't had much time to play. It was Mrs S' birthday on Friday and I felt that puzzling probably ought to take a second place that day. As a result. this article is a real short one and more philosophical than many of my posts.

At the MPP last weekend, I had a really nice chat with Dale (who gave me a copy of one of his old exchange puzzles from IPP 25 in 2005). Dale is one of the few puzzlers I personally know (apart from Dick Hess) who really appreciates disentanglement puzzles. Over the years od attending the MPPs I have worked many times on these fabulous challenges with him as we both seem to get stuck on the same types of thing. 

Lots of puzzlers seem to be attracted to the simple (and occasionally not so simple) interlocked nail puzzles but very few seem to really collect or solve the more complex wire puzzles and even fewer of the group love the puzzles that include string in them. Dale and I discussed why that might be as well as whether they should be displayed or even look good on display.

Whilst we worked together on a puzzle that he had been stuck on (it was a wood and string version of the classic ball and chain puzzle made with extremely tight tolerances), I had to admit that I did not display any of my disentanglement puzzles at all. It is difficult to be sure but I think I must have about 400-500 disentanglement puzzles and almost all of them are stored in Ikea storage baskets. The ones that I have solved are kept in the garage (I have a catalogue reminding me which ones are in which box) and a whole bunch of unsolved ones are in a wardrobe in the house. Only the one at the top of the post is currently on display and that is not because of the look... even though it is quite attractive, it is only on display because I am still working on it. I have been trying to solve this masterpiece by DDK and made by Mr Gao which was sold to me as part of the 2025 releases by Aaron Wang.

I don't find the diagrams help me much!

Dale and I were interested in finding out why so few puzzlers are really into disentanglement puzzles and those that are tend to be less appreciative of the ones involving string. I don't think we were able to come to any real conclusions. I personally have been moving away from the puzzles that involve string (unless they are Chinese ring variants) because I find many of them impossibly difficult to solve and in many of them the solving process can end in a dead puzzle with an irrevocably knotted string. I have been very grateful that Aaron's string puzzles for the last 3 or 4 years have included a quick reset mechanism. This is particularly useful when a knot occurs but also with the Chinese ring type puzzles, the sequence of moves is often so very complex that it is a frequent occurrence for a puzzler to lose concentration and either end up right back at the beginning without realising it or caught in a dead end and due to the huge number of moves to get there, it is often better to use the quick release and return to a known correct earlier position than to backtrack and get lost.

Circuit board I (also by DDK and made by Mr Gao)

Many of the non-Chinese ring type puzzles that have been produced over the last 5 or 10 years look fantastic (which is why I couldn't resist buying them) but require some incredible brain power to work out a solution. The Circuit board I above has a really short loop of string which would make you think it shouldn't be that difficult to wind it off the wire grid. However, I have been playing with this for a year as well and can honestly say that I am no closer to the solution now than when I first started. Indeed, Aaron did rate its difficulty as 10+ but I think only the very best of disentanglement enthusiasts will be able to work this one out. I consider myself to be above average on this wire puzzles but the sheer complexity of these is making me more and more hesitant to buy more string based challenges. 

I haven't completely given up on the Concertina wire puzzle yet because it is still attractive enough to leave on my puzzle tray and I do periodically feel I am making enough progress to come back to it periodically. I think that most puzzlers would hesitate to attempt the Circuit board and only a few more would be attracted to the Concertina wire because of the knowledge that it is a Chinese ring puzzle.

Grenade V by Shuai Chi made by Mr Gao

Having complained about string, I have to sheepishly admit that the new breed of designers are producing wire puzzles that are also immensely more difficult than the wire puzzles that I bought many years ago from Livewire. Many of those were incredibly tough but the wire from the likes of Aaron and Shuai Chi are several orders of magnitude more difficult. The Grenade series (there are currently 6 of them) look complex but not horrific but believe me when I say say that they are the very pinnacle of pure wire challenges. I have managed to get absolutely nowhere with them in a year of trying. At least I am not caught in an un fixable position but nothing I try seems to advance. 

Despite all of this apparent complaining, I adore these puzzles and have ordered a whole bunch of the 2026 releases (although only one which has string in it). I fully expect that most will be beyond my abilities and they will not end up on display but I will still have a lot of fun playing with them.

Now, Having spent a good while with the Concertina Wire and Dale's Elusive Chain Puzzle sitting on the table in front of of me whilst I type this, I have had an idea or two on how to progress so I had better get back to them now. Excuse me...

Pelikan Puzzling Continued

Cabinet - a Pelikan design

Yes, it's time to continue the reviews of the upcoming Pelikan release. I have been playing all week and have just finished them this morning. 

Cabinet

Every now and then Jakub releases a Pelikan in-house design. They are usually boxes with clever mechanisms and you really won't be disappointed by this. At yesterday's MPP, one of the topics of comnsversation that I had was about the Karakuri puzzle boxes and how beautiful they are with simple(ish) short but very elegant solutions. I lamented that I didn't dare get into Karakuri collecting as it would be the death of my marriage and my bank balance but I agreed with the elegance and simplicity. I have to say that the Cabinet puzzle by the Pelikan team is worthy of this same admiration.

It is beautifully made - and wonderfully tactile. There are 2 drawers and one knob. As it arrives, there is a good bit of rattling from inside. The challenge is to open the drawers of the cabinet and find the gold bars and the jewel inside (plus an extra treat). Nothing moves at all at first but it won't take very many of you long to get the first drawer open to find a treat inside. After that a little exploration will reveal the first of the prizes. Aha! Real care and attention in every part. At this point you have what looks like it can be used as a tool...you will have done it countless times before on other puzzles and been able to manipulate the mechanism. I tried this repeatedly and had no luck. I began to think that maybe the mechanism was stuck. I tried variants of my manipulation many many times with alterations in the orientation of the puzzle and got absolutely nowhere. I tried this again and again and again. Nope! Nuffink! I then had another thought and tried that but still no luck. I tried for a whole week. Eventually, I contacted Ivan Danik to ask for a hint. He didn't say much but did manage to tell me that my original thought which I had been trying for a whole week had been wrong. Grrrr! I am not very bright. Having abandoned that completely I had a little feel about and had a wonderful Aha! moment. I had actually used the correct move but needed to do it properly. After another try my treasure was all available. 

The Cabinet is just like a Karakuri - it is beautifully made with perfect tolerances and a simple but very elegant mechanism. All of you collectors out there will need this.

Teapot

Teapot by Lucie Pauwels

Another tray packing puzzle by the incredible Lucie Pauwels! There is no limit to Lucie's skills! I reviewed an interlocking puzzle coming from her and Pelikan last week which was fascinating and here she turns her hand to a rather lovely and clever tray puzzle. This is very ingenious and a good bit harder than it looks. What goes in a teapot ? Tea of course! What goes in tea? Sugar lumps! Here we have a pot and 8 different varieties of tea (T) made from Pink Oak to be placed inside the pot. Two other variants will be on sale: Wenge/Maple and Purpleheart/Ash. There are 4 single voxel holes left after all the teas are inside and these can be filled by sugar made from Maple. Normally you'd put your sugar in your cup but here it gets added to the pot.

This is a deceptive puzzle - it really doesn't look that tough but the lengths of the stems of the T's make it difficult to pack the cavity efficiently leaving only small few gaps. I worked for a long time (hours) to find the solution and it was very gratifying to eventually manage it. I dare say it can be solved by brute force but the best approach is to experiment with how the T crosses and stems can interact with each other and then plan what you need to do to keep the gaps to a minimum. There is only one solution to this and it might take you quite some time to find it. Perfect for all levels of puzzler.

Olympic Rings

Olympic Rings by Lucie Pauwels

Yes, another tray packing puzzle by Lucie. This follows a totally different premise than the Teapot puzzle. Instead of having to fill a cavity with shapes that get in each other's way, the aim is to fill a pathway with relatively simple pieces but a very limited length to the paths. The complexity and the logic comes from the constraint formed by the intersection of the paths. This one has pieces made from Pink Oak but it will also be available in Merbau.

I started placing the larger pieces in the lengths of the paths and then trying to fill the smaller gaps that were left after that.This seemed like a really good idea but it did not lead me even close to a solution. My next approach was to take the  3 more complex pieces and place those at the path intersections and then work from there. This definitely improved the situation but did not get me all the way. I ended up resorting to Burrtools and just peeking at the position of those complex pieces. Once I had them placed properly, I was able to progress quite logically with the rest of the puzzle. If I had not been time constrained then I might have managed this without cheating. It is a very challenging but logical puzzle which should only need a little trial and error. It is very attractive when complete and looks great on display.

Fatino

Fatino by Dr Volker Latussek

Another masterpiece from the master of the packing puzzle! Dr Latussek has been challenging us with restricted entry packing puzzles for years now and every time a new one is released, I think that he cannot have found something new but he has. This one has been beautifully made with a Mahogany box and Wenge pieces.

This time it looks like the puzzle should be possible without rotations because the limited entry hole is still a whole number of voxels in each dimension. BUT don't let that fool you. The pieces are all pentominoes and hence quite long. Any of them that have to go sideways perpendicular to the hole will need rotating into place once inside or tilting slightly through the gap. The hole to be filled is a 4x4x2 space and we have a total of 30 leaving 2 gaps to be hidden somewhere inside. This is going to be fun and VERY difficult!

Volker said this about the development of the puzzle:

In the past, I’ve combined some of the 12 flat pentacubes with other polycubes to design packing problems. In addition to the well-known pieces of the SOMA CUBE, I’ve also used spatial pentacubes - which are described by a 3x2x2 envelope - in a rather unobtrusive way. There are 15 different shapes of these, based on a rather casual remark by George Miller I’ll call them Fats. The Fats possess a harmony that is indescribable to me when they are combined. I will present my special discoveries to you at Pelikan. 

I’ll start with FATINO, six Fats in the box so familiar to me with a centered slit opening. In fact, I already had this CASINO-like box and, with FATINO, the name of the puzzle for the first time before I began finding the six matching Fats that describe a unique solution. The Fats are really bulky, as if they didn’t want to fit into the box. Ultimately, however, six of them took pity on me and gave me a truly beautiful solution. I really hope you enjoy the game of the Fats so much that you look forward to the discoveries to come.

I had to use Burrtools to find me some assemblies and then experiment with them to try and get one of them inside the box. Even using BT this way, isn't a panacea as each shape that is found (there are 6 of them) will have 8 possible orientations to try and of course, then you will need to see whether the disassembly is possible through the slot in the top of the box. Once I found a possible assembly it was a lovely dexterity and sliding problem to get the solution.

Damn! That is tough!

This is a stupendously good challenge. It is definitely possible by normal human beings (many of you might need BT to systematically find the possible assemblies and try them) but after that the puzzling is wonderful.

Yasya-Flop

Yasya-Flop by Dr Volker Latussek

Another puzzle in the "Flop" series is one that is not to be missed. There have been quite a few so far and this one is by far the most difficult. Jakub and team have made this from a wonderful Saman wood (aka Monkeypod) and Purpleheart. It arrives with all but one of the pieces packed in the box and took me quite a bit of fiddling to actually remove the pieces. This bodes for a very difficult solution to get all of them back inside.

The box has a 3x3x3 cavity and a 1½ voxel wide slot in the top through which all the pieces of a standard Soma cube need to be placed. I have mentioned many times that I am terrible at assembly puzzles. My appreciation of this occurred many years ago when I bought my first Soma cube. So here, I need to find one particular assembly of the Soma cube and then work out which orientation to try and then how to get the damn thing into a box through a small hole using rotational moves! Does this sound like fun to you? Yes, it does to me too.

Volker wrote this about it:

Fritz Pingl (FRITZ-FLOP) and Dick Fosbury (DICK-FLOP) are the namesakes of my FLOP SERIES. The rotation of individual pieces in these unique packing puzzles is reminiscent of their high jump techniques.

While I was recently playing with my STEFKA-FLOP, named after Stefka Kostadinova, I unexpectedly found a new solution. This is, of course, terrible, since every FLOP is supposed to have exactly one solution. But this new solution is so beautiful - not least because, just like with the FRITZ-FLOP, the opening can be compressed to exactly half of one of the square sides - that I don’t want to keep this experience from you. A production by Pelikan was a must. 

While searching for a suitable name, I learned that Stefka Kostadinova’s long-standing world record in the high jump from 1987 was surpassed in 2024 by Yaroslava Mahuchikh with a jump of 2.10 meters. So I dedicate my YASYA-FLOP to this exceptional Ukrainian athlete, who is affectionately called Yasya by her friends.  While solving the YASYA-FLOP won’t let you set a new world record, I hope you understand why this solution has remained undiscovered until now.

There is an immediate way to cut down the possible assemblies as the final pieces to be placed have to be able to drop straight in through the opening as there will be no room for rotations at that stage. This helps considerably but if I was you, I'd have a BT set of Soma solutions available to search through.

Not for the faint-hearted!

In the end, due to time constraints, I had to get the solution from Pelikan to give me the intended assembly and orientation and then work out how to get it inside the box. The movements are very complex and require considerable dexterity as well as judicious use of gravity to place pieces. Make sure that you know what you have done as taking the pieces out will be almost impossible. This is an amazing challenge but definitely only for the most expert of puzzlers.

Less is More

Less is more by Dr Volker Latussek

This gorgeous puzzle from Volker has been beautifully made from Wenge and American Cherry. It is stunning to look at and beautifully made. I thought that it had been sent out in the solved position but reviewing the instructions revealed that there is much more to this puzzle than meets the eye. Yes, it is a tray packing puzzle with a 7x7 tray and there are quite a few assemblies in the tray.

Having taken the pieces out for the photo, I found even packing them back in the tray very difficult. Finding the one that left me that nice square gap was almost impossible for me. But, for all of you who want something more interesting than a simple square tray packer, there is a LOT more to do - this is also an anti-slide puzzle. In fact, it is a multi level anti-slide puzzle. This will keep you challenged for a VERY long time.

Volker said this about it:

Nine pentominoes in a square grid (7x7). So what. The idea behind this particular anti-slide puzzle - simple in concept - kept me occupied for several years, and its implementation proved too challenging for me. I had to seek advice from Andreas Roever and Peter Müller, an algebra professor at my university in Würzburg. In the end, Peter Müller calculated the solution sequences. Unfortunately, my knowledge of Fortran wasn’t sufficient. But now, after an initial prototype with 6 pentominoes instead of nine for the Nob-Yoshigahara Design Competition 2025, Pelikan can release a small series for enthusiasts of such puzzles, and I’ve met a mathematics professor whom I can now call Peter. Peter, thank you so much for your great support, which allowed LESS IS MORE to come to life. 

LESS IS MORE contains various challenges, but in particular sequences of stable arrangements: Pack the nine pentominoes into the frame so that they do not slide. Remove one piece - the remaining eight pieces still cannot slide. Repeat this step until there are only three pieces left that cannot slide. 

When I play LESS IS MORE today, I am still amazed by the interplay of the pentominoes in the sequence from nine to three pieces, which still surprises me with its length.

Another goal of LESS IS MORE: Select three or more pieces so that they do not slip, and no further piece can be added without slipping, and no piece can be removed without the remaining pieces slipping.

I preferred to do the puzzle in the reverse order to the suggested one by Volker. Take 3 pieces and create an anti-slide placement with them (that isn't terribly difficult to do). Then add another piece from the unpaved ones and just add it to the shape already made in such a way that the new shape also cannot slide (this took me a little while). You will probably need to experiment with a whole bunch of 3-piece placements before you find one that works when adding a fourth piece. It was quite gratifying to find a four piece anti-slide assembly. Next, try to add another piece in and still have it not slide. keep doing this until all 9 pieces are placed. This will be a huge challenge! I am not entirely sure that a human can achieve this. I did manage to create a 5 piece non-sliding assembly but that is as far as I got. The computer programmers amongst you might manage to create a program to do this. If anyone is actually able to do it all without computer assistance then I would love for you to tell me.

If you manage the primary puzzle then there is a secondary challenge: Find 3 pieces to create an anti-slide assembly but in such a way that it is not possible to add any more pieces that are anti-slide. This is not terribly tough but having done that, do it again with 4 pieces - none of the 4 can slide but it's impossible to add a 5th piece that doesn't slide. Keep doing this up to 9. So many challenges in one beautiful tray puzzle.

All of these are amazing puzzles! They should hopefully be going on sale later this week. My picks from them are Cabinet (who can resist a Pelikan design puzzle and this has a very ingenious mechanism), Swan cube (it's just beautiful logic) and Fantino for the elegance. But you cannot go wrong with any of them. 

Let The Pelikan Puzzling Begin

Five Helicopters by Tibor Mikloš

This is a rather quick blog post. I have just spent 45 minutes on the phone trying to provide computer support to my 86 year old Mother-in-law for her 10 year old iMac. To my utter horror, TeamViewer no longer supports her ancient operating system and everything had to be done by her describing what she saw on screen over the phone and me trying to give instructions. She is not very computer savvy (unsurprising given her age) but she does try and manages reasonably well for the most part. I am not sure who was in worse condition at the end of it all. I think she was a bit frazzled but had mostly managed to achieve what she wanted and I had chest pain. As a result of this, plus the puzzles only arrived on Thursday, I only have two little reviews for you.

Yes, it has been a few months and it is coming up to the IPP so it is time for Jakub and team to release the next batch of puzzles. There are a good few, including one of the greatly anticipated Pelikan design puzzles.

Five Helicopters

Amongst this release are a few tray packing puzzles which is one of the less common types for Pelikan to release. Of course, they won't do one with plastic pieces, they make theirs out of an assortment of rather lovely woods which have been laser cut and a wooden tray as well. This one was designed by Tibor Mikloš who was last featured on this blog and from Pelikan back in December 2023 with a padlock burr that one was a very nice design and this also doesn't disappoint. 

Usually, I am terrible at this sort of puzzle - I find that I spend most of my time performing lots of random trial and error packings and can't keep track of what I have attempted. This means I go round and round in circles before giving up in disgust at how rubbish I am. I have many many puzzles from Mine that I haven't managed to solve for this reason.

In this one there's a lovely large space to fill and 5 identical helicopters to place it it. The thing about this challenge is that the helicopters, with their blades and tails are very spiky and take up a large space and don't seem to interlock together in any intuitive ways. I played with the pieces outside the tray for a while and found a nice way to put 3 together which didn't leave a lot of space between them. Maybe there would be a fun mathematical tiling to use? I placed them in the tray and picked up my 4th piece only to find that if I tried to continue the logical sequence, it wouldn't fit. I tried the same thing many times and singularly failed. maybe it's not a mathematical solution? I then looked at the pattern on the side of the tray to see if I could place some pieces closer to the edge and make more space as a result. This was a key thought! Unusual for me to have thoughts but I had better make the most of it. After another 30-40 minutes of playing I had a major breakthrough and had my 5 helicopters in the tray and a photo taken. Hooray! Ive solved a packing puzzle without just trying random things! It's pretty good this one - perfect for a beginner or an expert!

Swan Cube

Swan Cube by Lucie Pauwels

The wonderfully talented Lucie has appeared on my site many many times and I have gushed every time about her designs. She has not disappointed here either. The Swan cube is made using Wenge, Maple and wonderfully vibrant Merbau. It arrived assembled as a sort of cuboid structure with gaps in it so obviously not correctly assembled. Obviously, the aim is to dismantle it (quite an easy feat) and then assemble it as a proper cube shape with no gaps/holes. In the assembled shape above there is no indication of the reason for the odd name, but once the 6 pieces have been separated the reason immediately comes clear:

Six swan shapes

The pieces all have a hole in the side and a swan shaped neck and beak that clearly needs to engage with the hole. Once all beaks are in all holes then we should have a completed cube - easy? Nope! Luckily, I did have the forethought to take a photo of the assembly orientation so that I can store it in the transport configuration.

I began looking to see how the walls, holes and beaks would interact and quickly made some good progress...until I had a piece where the beak wouldn't reach the hole. Damn! I knew it had been going too well. Starting afresh with a different set of beaks and holes and I had something that really looked promising as it would make a nice half cube around one corner. The problem here was that whilst the three pieces should interact nicely, it would require a coordinate motion to achieve it and that wasn't possible with these shapes. Sigh! After yet more failure, I realised that two of the pieces had an extra cubic on them. That was getting in the way of what I wanted to do. Time to think©.

After a little more time I had a rather good idea. I worked on my idea for a while and made progress gradually until my last piece fitted perfectly into place.

Oooh clever!

This was very gratifying and a perfect logic puzzle. I dare say that it can be solved by randomly putting pieces together until you get the right assembly but this should be solved as a pure logic problem. It is very clever and looks lovely in both assembled and false assembly positions. Probably best for the more medium experienced puzzler rather than absolute beginner.

I will be working on the rest of the puzzles over the coming week or so and get my reviews out to you as soon as I can. However, my experience with providing remote computer support has given me the overwhelming urge to lie down for a while! 😱😱😱

Having A Puzzle Friend Is Essential

I Need My Lunch By Idan Shvartz

Last week I mentioned how I had suddenly started to make progress on Idan's amazing INML puzzle after many weeks of attempting to do the same thing over and over again. Having gotten started on it, at various intervals during my work, I found myself stalled with no obvious way forward and at least once, no way back either.

At this point, I have to extoll the virtue of having a puzzle friend. Either someone who has done it before or as I have done many times in the past, someone (Shane) who simultaneously solves it and we help each other along. With this puzzle, I had the company of Dominic who was the one who initially recommended Idan's puzzles to me. The wonderful thing with solving this puzzle with Dominic in the background was that he knew all the pitfalls and was able to give hints that really were barely hints. Looking through the email chain, I can actually see that he barely said anything at all. The main feature of a good clue giver is someone who can just remind you to look where you've already looked, he doesn't tell you to do anything just a hint to focus somewhere. I am vey grateful for this support because I still feel like I have actually solved the puzzle myself but not gone off on some awful tangent for too long or done something damaging to the puzzle.

At the end of last week's post, I had found the first part of my lunch and had gotten stuck at that point. I didn't know what I had actually done to get it and actually wasn't sure where it had come from. More worrying, I found myself unable to backtrack. Initially this had been a source of stress until I went back and re-read the instructions that Idan had given me. He said that 

"Resetting the puzzle is another piece in itself as part of the overall solution of the puzzle". 

This made me realise that the reset was not going to be just a matter of reversing what I had already done. I could continue toward on it in the knowledge I was getting myself further and further in the "proverbial sh1t" but there would be a way to puzzle my way out of it.

I was presented with a pair of large holes and a new tool. A quick think© again and I was on my way. More pieces were coming out and more places to stick things. Looking at the puzzle, I knew with certainty what I needed to eventually do but I was a long way from being able to achieve it. I got stuck again and after another chat with Dominic, I was encouraged to look at a part of the puzzle that I had so far more or less ignored. I had noticed something odd about it way back at the beginning of the odyssey but there was nothing I could do with it. Now, though, I had a new tool and a new set of possibilities. This time I had to think about several tools at once and a little dexterity had me the very thing I was hoping for. Time to push it into the puzzle to get my reward... NOOOOO! It wouldn't do what I wanted. Aargh! There was a teeny tiny bit of movement but something was locking it up. Think© again you eeejit!

I could see a potential locking mechanism but had no way to get to it. Or did I? What if I try this??? Nope! Blocked again. What was blocking it? This puzzle keeps you searching and thinking at every single step. So much stuff has been crammed into one very diminutive shell. I quickly manipulated the block and started using my tool to remove the blockage. Ooh! I needed a second tool and then a third before using my fourth tool at the same time, I had the next stage open. 

LUNCH IS SERVED! There's no clue behind the button but the aim of the challenge can be seen.

All that effort for a beer and a sandwich!

Having whooped with delight at getting my lunch, I turned to resting the damned thing. I had upset Mrs S by using one of her Tupperware containers to hold all the parts - there were 16 separate parts plus a whole bunch of loose bits within the main body of the puzzle. It was going to be one hell of a job getting this thing back to the beginning. Especially as several of the moves didn't seem to be reversible. At one point during the solution the obvious dovetail had been slid but was now locked open. Nothing seemed to allow me to reverse what I had done so it was obviously I had to look harder. The piece that I needed was very very well hidden but once I had it, there were a number of things I could do with it. Only one of which got me anywhere. I got stuck thinking the wrong thing after that and Dominic came to my rescue yet again. No need to tell me what to do - another of his skilful hints about how to think what might be possible with my current configuration and all of a sudden I was back on the correct path.

My goodness! That first part of the reset was very clever! Idan is another genius like Derek. I am amazed yet again. After that clever move the reset is partly a matter of remembering what pieces came out of which hole and also remembering what order they had been released to me. Luckily I had taken extensive notes and I was back at the beginning in about 15 minutes.

A repeat solve showed that I did understand it and I took my photo of all the parts that could be released from the puzzle. No I am not going to publish it for general viewing.

So much packed into one small package!

Idan has an incredible puzzle brain! This is one of the best puzzles I have ever solved - it is very rare for me to write about the same puzzle twice in a row! It will be at the top (or close to it) of my top ten(ish) of 2026. I can't wait to see what he manages to produce next. If you get a chance to own or even just play with this puzzle then jump at the chance!

Thank you, Dominic, for recommending this puzzle enhancing my experience so significantly.