Kuromasu, also known as "Kurodoko," is a logic puzzle originating from Japan. It's played on a rectangular grid with some cells containing numbers. The main challenge is to determine whether each cell should be colored black or left white.
- The grid consists of cells that can either be colored black or left white.
- Some cells already contain numbers, offering clues for solving.
- The numbers in the cells indicate how many white cells, including the numbered cell itself, can be seen horizontally or vertically from that cell.
- A cell is considered "seen" if it lies in the same row or column without any black cells obstructing the view.
- Cells containing numbers cannot be colored black.
- Black cells cannot be adjacent, either horizontally or vertically.
- All white cells must form a single connected group, meaning every white cell must be adjacent (horizontally or vertically) to another white cell.
Basic Solving Tips
- Starting Point: Begin with cells having high numbers. They offer clues about long stretches of connected white cells.
- Black Cell Blockers: If coloring a cell black obstructs the view of a numbered cell, preventing it from meeting its required count, then it must remain white.
- White Cell Connectors: To ensure all white cells remain connected, look for cells that, if colored black, would isolate a group of white cells. Such cells must remain white.
- Adjacency Rule: If a cell is determined to be white based on the above clues, any adjacent cells will be black, as no two black cells can touch.