World's Most Difficult Jigsaw Puzzle, Kittens edition - Solving tips

The World's Most Difficult Jigsaw Puzzle series was released in the 90s, and as a huge cat fan and lover of jigsaw puzzles I was given this Kittens Edition puzzle when I was a teenager. I'm not usually one to choose very difficult puzzles, but I couldn't resist the image on this one, and I remember solving it without too much difficulty. 

I was able to solve it because I realised that there is a bit of a trick to completing it, and it's not nearly as difficult as it is made out to be. So today I thought I'd share how I completed this vintage puzzle, to show that it's not as daunting as it looks!

Why so difficult?

This 529 puzzle is double sided, depicting the same artwork on both sides, rotated 90° with respect to each other. The puzzle is then die cut once from each side so top and bottom are identical!

Why is it not so difficult?

All the pieces are the same shape and size, and they fit in a regular pattern. The cats are distinctive, with different shades, eye colours and patterns. There aren't really that many pieces, and if you have a decent sized table or puzzle board you can lay them out all at once for a clear view. If you spend time sorting the pieces using the method that I'll explain below then once you come to the assembly you are familiar with the pieces and you can put it together pretty easily. Also the description of the rotation is misleading, as that's not quite what is going on.

How to solve the World's Most Difficult Jigsaw Puzzle

The way this puzzle works is that the reverse side image is reflected along the diagonal, which runs from the bottom left to the top right corners. My son has better spatial awareness skills than me and helped me to understand, I still don't really get it but you just have to imagine a diagonal line running across it - I've included a photo lower down to illustrate it!

Start with the edges

There aren't many edge pieces. As you look through the puzzle pieces, you will notice that the majority of the pieces can be put together in pairs with an identical albeit rotated part of the image on each side.

This is the key to solving the puzzle. 

So sort out the edge pieces, then group them into their pairs. You will be left with two corner pieces which each have the same image section rotated, and two corner pieces which pair together. You need to find all the edge pieces before you can start putting them together.

Pick out one of the corner pieces that has the same image rotated front and back. In this puzzle, they will be the bottom left and top right pieces. Place the piece down, and this first piece will determine the top side of the puzzle. 

Then take all the edge pieces and separate them into their pairs. Turn one of the pieces over to show the reverse image. Keep the pairs clearly together! Now you have all the parts of the image laid out, so you can put together the edge. Start from the corner, and choose the piece from the pair that fits on one side. If it doesn't fit then use the other piece. Then the remaining piece will go the opposite side of the corner piece. It shouldn't take too long to put the edge together!

Sort the remaining pieces

I won't lie - this is a big job. But it's absolutely worth doing! You need to got through all the remaining pieces, and sort them into their pairs. Don't worry about which way up they are, just make lots of little piles of two pieces. The image on each will have the same orientation.

Not all the pieces have a pair. The pieces that run along the centre diagonal from bottom left to top right, in this puzzle nineteen pieces, will have the same part of the image on both sides, but rotated. Keep these to one side, but don't forget about them when assembling! You can place them down the middle if you like, but you won't know which way up they go until you place pieces around them.

Tips for sorting the pieces into their pairs

* When looking for pairs, remember that because the pieces are double sided, the match that you are looking for might be face down.

* Look for distinctive pieces, for example those that are all one colour or in the case of this puzzle the eyes are a good place to start.

* If you can't find a match for the piece that you are holding, turn it over and hunt for the reverse image.

* Group all the pieces with one dominant colour, and when you've established that they don't pair with each other then turn them over and look for the other side.

* Because the pieces are all the same shape you can orient them all the same way which makes it easier to find a match.

* Many pieces can be placed the correct way up because of the cat's face or ears, which helps when finding a match.

Ready for the final assembly!

That's the worst bit over with!

Take all your pairs, and like before place them together and turn one of the pieces over so that all the parts of the image are visible. Keep the pairs together! Ideally you will have enough space in your puzzle area to lay out every piece clearly.

From your pairs, one of the pieces will go one way up and one the other, but you don't know yet which is which. So I find it easiest to start from the edges. Once you have placed one piece, you know that the other piece in the pair will fit in the corresponding place on the reverse side. If the piece doesn't fit then you know that you need to use the other one from the pair. You can see the reflection in this picture:

I've tried to explain it more clearly by placing a line across the board showing where the image is reflected in the photographs below. You can see how the irregular groups of pieces that I have already placed at this point are reflected across to the other side of the puzzle. It took me a while to work this out, and even when I knew how the reflection worked I still found it tricky to work out where to put the second piece - often I had to flip the next piece over to see where to put it! You just know that if you've connected the first piece to an existing piece then the second piece will fit somewhere!

Once you've got going, you have lots of places that you can work off and it's not so difficult to spot the pieces that you need. Keep all the pieces oriented the same way to make finding them easier, and as I keep saying, don't muddle up the pairs!

Completed puzzle

All the pre-sorting really does pay off, and completing the puzzle shouldn't be too difficult. I really love this puzzle, it's a vintage reminder of childhood and I've done it lots of times now so it's easier each time as I remember all the different little cat faces.

Other puzzles in the series

There were lots of other puzzles that were a part of this series. I saw one in a charity shop not that long ago which was a repetitive pile of sweets, and decided that it wasn't for me as I was looking for easier puzzles at the time. There was a Baked Beans one too I'm sure. They do pop up quite often on eBay so they are still around in cupboards all over the country - If I spot another on my charity shop trails in the future I'll probably pick it up, just so I can see if it's solved in the same way!