A hybrid of Minesweeper and Sudoku. Fill every cell as either blue or grey so that every row, every column, and every block (if there are any) holds the same amount of blue and grey cells.
Each numbered cell indicates how many of the surrounding cells, including itself, are blue.
Click/tap on a cell to cycle it through blank, blue, and grey. Right click a cell to clear it.
Every puzzle has exactly one solution.
There are several variants.
Load a specific puzzle or enter a date in YYYY-MM-DD format to play that day's puzzle: