Ebony & Ivory
The origin of this puzzle is not known. It is similar in strategy to nonograms.
Puzzle and Goal
An unsolved puzzle consists of a rectangular grid. Along the top and left are black clues; along the bottom are right are white clues.
The goal is to color the grid in order to satisfy the clues.
The solved grid must satisfy the following conditions:
The number in each rank indicates the maximum block of cells in that rank of that color. There must be at least one block of that length in that rank.
Each cell in the grid must be colored black or white.