Kuromasu

What is Kuromasu?

Kuromasu is a logic puzzle where you fill a grid with black and teal squares based on numbered clues. The goal is to find the correct black squares so that all teal squares form a single connected group. It's a pure deduction game with no time pressure.

How to play Kuromasu

Each numbered cell indicates how many teal squares are connected to it, including itself. You decide which cells are teal or black, using the clues to deduce the layout. The game flags moves that make the puzzle impossible, and you can use a limited reveal feature if stuck.

Tips & strategy

• Start with cells showing small numbers, as they restrict the possible teal area.
• Remember that all teal squares must be connected, so avoid creating isolated teal cells.
• Black squares cannot touch each other, so use that rule to eliminate candidates.
• Watch for cells that would trap a teal square and turn it red—those moves are wrong.
• Use the reveal feature sparingly; solving without it gives a better sense of the logic.

Frequently asked questions

Where to play

Play Kuromasunibble.games · free, new puzzle daily

Play here