Cross Puzzle – The Game Pieces
Just like in the Tangram puzzle, each piece of the Cross puzzle can be assembled from right isosceles triangles. The puzzle pieces belong to the family of polyabolos.

The Cross Puzzle
How do you turn a rectangle into a cross?
This is the starting puzzle of the Cross Puzzle.
However, the seven pieces allow for much more – numerous additional shapes can be formed from them.
In contrast to Tangram shapes, which mostly reproduce representational silhouettes, the Cross puzzle shapes consist primarily of abstract, geometrically symmetrical forms. Many of them fit exactly into a grid of right isosceles triangles and are therefore suitable for automated solution searching with a solving program.
A selection of Cross Puzzle shapes












Resources & Downloads
3D Print Templates
The 3D-print templates consist of the seven Cross puzzle pieces and a slider box.


Solver program

The Cross Puzzle solver is part of a program collection available for download on Itch.io. It is for Windows only.
IMPORTANT: For a correct installation, please read the Instructions before unpacking!
Crafting Templates
Download multi-colored crafting templates for a cardboard Cross puzzle


