If you try to tile with this puzzle game, you won't be able to find a pattern that repeat itself.
Any time you open the box, the game is always different.
This is the first Aperiodic Monotile discovered (Einstein = One Stone)
Yellow tiles are mirrored blue ones, so you can detect where you need to reflect one tile.
With the box you will be able to carry these stones everywhere.
Suggestion: print a color much more than the other, since you need reflected tiles once in a while.
Enjoy, try to use as many reflected tiles you can, you'll see it's not that easy.