Chapter 47: Clusters
You are given a grid containing some colored squares with dots. Fill every remaining cell with one of two colors while obeying these rules:
- Every dotted tile is adjacent to exactly one tile of the same color. All such tiles are given from the start.
- Every other tile must be adjacent to two or more tiles of the same color.
This puzzle type was invented by Inaba Naoki under the Japanese name Kurasuta and is documented here from x-sheep/puzzles-unreleased.
Original puzzle page: inabapuzzle.com/honkaku/kura.html
47.1 Clusters controls
Left-click to place blue squares and right-click to place red squares. Dragging applies the same action to multiple cells.
With the keyboard, use the arrow keys to move the cursor. Press Enter to place blue and Space to place red.
47.2 Clusters parameters
These parameters are available from the Custom... option on the Type menu.
Width, Height: Grid dimensions.
Status: playable in the unreleased collection. No difficulty settings are currently available.