Sudoku
Fill the 9×9 board with numbers from 1 to 9. Each row, column and 3×3 box must contain every number exactly once. Given numbers cannot be changed. Use notes to mark possible numbers. Keyboard: 1–9 enters a number, Delete erases, arrows select cells, N toggles notes, U undoes a move. A hint reveals one cell. Your best time is recorded when solving without hints or checks. Every puzzle has exactly one solution.
How to play
Fill the 9×9 board with numbers from 1 to 9. Each row, column and 3×3 box must contain every number exactly once. Given numbers cannot be changed. Use notes to mark possible numbers. Keyboard: 1–9 enters a number, Delete erases, arrows select cells, N toggles notes, U undoes a move. A hint reveals one cell. Your best time is recorded when solving without hints or checks. Every puzzle has exactly one solution.
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