[url=http://mathworld.wolfram.com/DodecahedralGraph.html]Dedecahedral graph[/url] is [url=https://en.wikipedia.org/wiki/Schlegel_diagram]Schlegel diagram[/url] of [url=https://en.wikipedia.org/wiki/Dodecahedron]dodecahedron[/url]. It is [url=https://en.wikipedia.org/wiki/Planar_graph]planar[/url] graph with chromatic number 4.

The problem of [url=https://en.wikipedia.org/wiki/Graph_coloring]coloring a graph[/url] arises in many practical areas such as pattern matching, sports scheduling, designing seating plans, exam timetabling, the scheduling of taxis, and solving Sudoku puzzles.[br][br]Updated version using [url=https://www.geogebra.org/material/show/id/pGCXX3wW]Coloreando el mapa[/url] by [url=https://www.geogebra.org/ilarrosa]Ignacio Larrosa Cañestro.[/url]