Regions in drawing (ignore background) can be coloured using three or fewer colours such that no adjacent regions are coloured the same colour vs. four colours are required.

Regions in drawing (ignore background) can be coloured using three or fewer colours such that no adjacent regions are coloured the same colour with vs. four colours are required.

Regions in drawing (ignore background) can be colored using three or fewer colors such that no adjacent regions are colored the same color with vs. four colors are required.

This Problem is related to the four colour theorem.

Jago Collins

Bongard Problems with world one elongated black shape with an elongated small hole in its center vs. other Bongard Problems

Aaron David Fairbanks