A pyramid of hexagonal cells is to be colored red, white, and/or green. There’s just one rule: Each cell taken together with the two cells directly below it must be either (1) all three the same color, or (2) all three different colors.
The example on the left is correctly solved. The one on the right is nearly correct, but has a problem at the marked cells.
Deduce the unique solution from the given clues! There are more than 130 puzzles here to be solved, of various sizes and difficulties.