Interesting little puzzle game based on a mathematic theorem of the same name[en.wikipedia.org].

The puzzle are a lot more difficult when you go for the star: that imply that you have to maximize the number of time you use the yellow colour (10 points), then the blue colour (6 points), then the red colour (3 points) and finally the green colour (1 point).

The first few puzzles make the game look easy but it is a deception, it get harder later...

Interesting little puzzle game based on a mathematic theorem of the [url=https://en.wikipedia.org/wiki/Four_color_theorem] same name[/url]. The puzzle are a lot more difficult when you go for the star: that imply that you have to maximize the number of time you use the yellow colour (10 points), then the blue colour (6 points), then the red colour (3 points) and finally the green colour (1 point). The first few puzzles make the game look easy but it is a deception, it get harder later...