
The magnetic edition
Magnetic pieces and printed challenges invite you to solve and play on a board. The magnetic game is a current product, priced at €20 including VAT.
Discover the magnetic editionHISTORY AND EDITIONS
Julien Selz created UNITED SQUARE in 2011. After meeting at a fair, mathematics teacher and trainer Stéphane Robert proposed developing its educational side together.
2011 · THE BEGINNING
UNITED SQUARE began in 2011. One square, four coloured triangles and the desire to connect them: Julien Selz imagined a game that invites people to handle, explore and play with the same shapes. The idea then took different forms.
A MEETING · EDUCATION
Stéphane Robert discovered UNITED SQUARE at a fair. A mathematics teacher and trainer introducing mathematics through board games, he proposed working with Julien on its educational development.
He wrote the educational worksheets and enabled UNITED SQUARE’s presence on Éduscol. The box also credits his contribution to the challenges.
DIFFERENT FORMATS · DIFFERENT EXPERIENCES
UNITED SQUARE begins with a box of 49 pieces, played on a virtual grid of 25 or 49 spaces. From the outset, one principle guides the game: assemble the pieces by matching their colours.
This visual language then takes shape in three dimensions with the UNITED SQUARE puzzle cube. Its patterns extend from one face to the next through shared colours. Once the faces are scrambled, however, restoring that continuity becomes an unexpected challenge for expert puzzle enthusiasts. Cube² comes next: a version with 25 tiles, without a board, in a cubic box that is easy to take along.
Each version offers another way to play. Plateau Puzzle adds a board to organise the game. The magnetic edition combines hands-on play with numerous challenges. Mini-cubes to assemble explore constructions in three dimensions in turn. With POSTER, the game also becomes an object to display, on a wall, on its easel or around a table.

After the 49-piece box and the invention of the puzzle cube, Cube² brings together 25 tiles without a board in a portable cubic box. Plateau Puzzle offers a version with a board. These editions share the colour-matching principle.
The 2011 Cube² is distinct from the turning puzzle cube presented in today’s collection.


Choose an experience, then its rules. The contents of one box do not define every edition.

Magnetic pieces and printed challenges invite you to solve and play on a board. The magnetic game is a current product, priced at €20 including VAT.
Discover the magnetic edition
A board, 25 tiles and an easel sleeve. Rebuild the image or match the colours on your own, then play strategy with 2–4 players. After playing, return the POSTER to its sleeve.
Explore the POSTER
The UNITED SQUARE puzzle cube is part of the collection. Restoring colour continuity from one face to the next after scrambling them is a challenge for expert players.
Discover the puzzle cube
Explore the existing digital experiences: puzzles, strategy and families of challenges. Choose an activity in PLAY and follow its on-screen instructions.
Explore PLAY