The Dot Box

This strange and baffling puzzle came to me courtesy of James Dalgety during the IPP34 Puzzle Exchange in London last year. James owns the largest known collection of puzzles in the world!

I had played with the Dot Box on and off for several weeks now and was only just able to solve it this evening. That being said, it was solved more through trial and error with hints from James' webpage dedicated to the Dot Box (Warning; spoilers therein)

The Dot Box consists of a pentagonal box which sits into a base (called a plinth). The puzzle is 3D printed in ABS resin by Simon Bexfield and Steve Nicolls, the duo from Threedy 3D Printers. Quality is very good for a 3D creation and everything fits well together. 

There are four challenges indicated on the puzzle:-

1. Open the box
2. Close the box
3. Understand it
4. Explain it.

My early attempts without resorting to the hints was to try to decipher the rattling noises inside the box. Couldn't really tell what was going on inside but the plinth and box were attracted to each other so I knew that there had to be some magnet(s) inside. 

For the weeks that followed, I tried various means of opening but nothing work. All along I thought the magnets had something to do with the solve and tried to interact the plinth and the box but this was not to be the case. Eventually I went to the website for clues.

I somehow finally managed to solve challenge #1 (through my own unorthodox method), #2 and #3 (after looking at the hints and after the puzzle was opened). And well, sort of #4, although I still can't quite figure out the scientific basis of the solution. The "trick" used in the Dot Box is the first time I have come across. And I can't really explain it or understand fully how it works. 

James mentions on his site that the full solution (and explanation) will only appear when the IPP34 booklet is out, which is probably the end of this year or early next year, so I guess I will have to wait until then. 

For those that have solved or not solved the Dot Box, please feel free to leave your comments!

The Perplexing Palace Puzzle

Update 23 October 2017 - Dear Reader, please check out my new puzzle blog and e-store at http://mechanical-puzzles.com

The Perplexing Palace Puzzle ("PPP") was James Dalgety's competition entry for the IPP32 Puzzle Design Competition held during August in Washington, USA this year. Designed by James Dalgety, Martin & Brian Scoefield, it is what I would consider a semi-dexterity puzzle.

Measuring about 17cm x 9.8cm x 0.75cm, the puzzle is made out of acrylic. Construction fit and finish is very good. Physically, the puzzle is a flat tray containing within it 10 acrylic discs; 4 red, 3 purple, 2 black and the last one, which is smaller than the rest, a black disc representing the Queen. Covering the tray is a white cover with holes cut into it, large enough to see the discs inside (and put your finger in) but not enough to allow the discs to be removed or fall out should the puzzle be turned upside down

The object of the puzzle:-
"The Queen, surrounded by her nine attendants, starts in the centre of the palace. Take her out of the palace then return her and her attendants to their starting positions"

The discs inside the tray are packed loosely and you can slide the discs around by shaking the puzzle or you can use your fingers through the holes in the cover. The goal of course is to try to manoeuvre the Queen from her centre hole position to either the top left or bottom right holes where she can then be extracted.

Somewhat like the classic "15" puzzle, one starts by shifting the discs around to make way for the queen. This is exactly how I started but repeatedly, I found myself getting stuck at one side or the other, near the exit holes. Clearly it is not so simple; the coloured discs get in the way of the Queen and she is also hindered by other obstacles. Initially it appears there is there no way to get the Queen out. When you start playing with the PPP, you will know what I mean.

It took me a good part of the evening but eventually I managed to get the Queen to exit from the top left hole. To complete the puzzle, the Queen and her attendants (the rest of the discs) must be returned "to their starting positions". Here I also fumbled a bit before everything was finally back in place. Throughout, a fair amount of dexterity and nimble figures are required. The solution is pretty tricky but quite clever. Here's a tip; play with the PPP under bright white light or during the day if possible....warm or cozy lighting will wreck havoc with the colours of the discs.

Overall, an interesting and challenging puzzle that I think, falls outside the usual genres. True to its name, the PPP is rather "perplexing" indeed, at least for me. Nice and unusual design and worth acquiring. Contact James Dalgety directly via his site http://puzzlemuseum.com if you want to purchase one.