Several different versions of the Impossible Puzzle have been published. There are the 108 piece version, the 250 piece version, the 500 piece version, and the 1000 piece version. All of these puzzles feature similar colors on a solid background and require brain work to complete. They also have unique shapes, such as triangles and squares. They are also a great gift for kids. They come in sturdy asymmetrical-shaped storage.

The Impossible Puzzle is a jigsaw puzzle that has a lot of humorous characters. This puzzle is made from recycled cardboard and UV inks. The puzzles are also a great choice for eco-conscious consumers. The Impossible Puzzle also comes in a white version. It is part of a series of 1000-piece eco-puzzles.

The 144 piece puzzle has animals of similar colors on a solid background. The puzzle also has no interior plastic packaging. This makes it a great choice for kids who like extra challenges. It also makes a great gift for any occasion.

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The 330 piece puzzle is more difficult than the 144 piece puzzle. This puzzle has no plastic interior packaging, but it comes in a sturdy asymmetrical-shaped storage box. It also has a glow-in-the-dark message. The puzzle is also designed to be hard to complete. It will take weeks to complete this puzzle. However, it will give sheer satisfaction once it is completed.

The 1000 piece puzzle is also very difficult to complete. It has 1000 lines in different directions, but it also looks like a random symmetric doodle. It also has pieces that look like ice. If the pieces are not placed correctly, it will be difficult to solve this puzzle. It is recommended that beginners do not attempt this puzzle. It is also not for people with poor eyesight.

The MU puzzle is also a difficult puzzle. This puzzle is based on a problem that Martin Gardner devised in 1980. This puzzle requires two positive integers. The two integers must be greater than 40 and the solution must be written in the form of MU, a string with the letters MI surrounded by a circle. If the wording of the puzzle is slightly changed, the puzzle will be insoluble. The puzzle also contains 31 dominoes. It also requires that the edges of the Petersen graph be colored with three colors.

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The Kraken puzzle is also difficult to solve. The puzzle has black fields and white fields. The puzzle also has a glow-in-the-dark “Kraken” message that can be unlocked by using a code. If the puzzle is opened, it will be impossible to solve. It also includes a prize in the merch store.

The Impossible Puzzle line-up has also been revised. The 1000 piece cellular puzzle is a twist on the puzzle. This puzzle also comes with a quality board and a good fit of pieces. This puzzle is made in Italy, so it is very high quality. It measures 27″ x 19″ when the puzzle is completed.