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Dodecahedron coloring

Click on the faces to color them. To change the color, click on the same region again.

Dedecahedral graph is Schlegel diagram of dodecahedron. It is planar graph with chromatic number 4.
The problem of coloring a graph arises in many practical areas such as pattern matching, sports scheduling, designing seating plans, exam timetabling, the scheduling of taxis, and solving Sudoku puzzles. Updated version using Coloreando el mapa by Ignacio Larrosa Cañestro.

One of the 20 solutions

One of the 20 solutions