Tredoku
A Sudoku that appears to exist in three dimensions. The creator of the puzzle, Eyal Amitzur, explains:
In architecture there is a type of view called axonometric projection, where the object is viewed from all three sides (front, side and top) at the same time without the distortion of perspective.
This projection is what makes a Tredoku puzzle appear three-dimensional. The rules are the same as Sudoku, but the puzzle can appear very different. The look of the puzzle is important to Amitzur and he makes a connection between his puzzle and the work of artists M C Escher and Bridget Riley.
The puzzle appeared in The Times for the first time on Boxing Day, 2008.
