SolutionsĪ good number of solutions for this puzzle exist on the internet. The Square One puzzle was sold in this shape with instructions for turning it back to a cube. Alternative versions of the Square One may have different colour schemes. In its solved (or original) state, viewing the cube from the face with the word "Square-1" printed on it, the colours are: white on top, green on the bottom, yellow in front, red on the left, orange on the right, and blue behind. For the puzzle to be solved, not only does it need to be in cube shape, but each face of the cube must also have a uniform colour. Like Rubik's Cube, the pieces are coloured. Once the puzzle has a cube shape, the upper and lower layers are cut in an Iron Cross-like fashion, or equivalently cut by two concentric (standard) crosses, that make an angle with each other. However, since only two shapes are possible for the middle layer, there is a quick sequence of twists which changes the shape of the middle layer from one to the other without touching the rest of the puzzle. ![]() This leads to bizarre shape changes within the puzzle at any point.įor the puzzle to be in cube shape, the upper and lower layers must have alternating kite and triangular pieces, with 4 kite and 4 triangular pieces on each layer, and the middle layer must have a square shape. Note that because the kite pieces are precisely twice the angular width of the triangular pieces, the two can be freely intermixed, with two triangular pieces taking the place of a single kite piece and vice versa. In this way, the pieces of the puzzle can be scrambled. The middle layer contains two trapezoid pieces, which together may form an irregular hexagon or a square.Įach layer can be rotated freely, and if the boundaries of pieces in all layers line up, the puzzle can be twisted vertically, interchanging half of the top layer with half of the bottom. The kite pieces are 60 degrees wide, while the triangular pieces are 30 degrees wide, relative to the center of the layer. There are all together 8 kite and 8 triangular pieces. They are also called corner and edge pieces, respectively. The upper and lower layers contain kite and triangular pieces. ![]() Its design was also patented on October 5, 1993, with patent number D340,093. On March 16, 1993, it was patented in the USA with patent number US5,193,809. Application for Czechoslovak patent was filed on 8 November 1990, the patent was approved on 26 October 1992 with patent number CS 277266 B6. The Square One, with the full name "Back to Square One", and alternative name "Cube 21", was invented by Karel Hršel and Vojtěch Kopský around 1990.
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