Fill the 9×9 grid so that each row, column, and 3×3 box contains the digits 1-9 without repetition. Click a cell to select it, then use the number pad to fill in a digit.
Notes mode lets you mark candidate numbers in empty cells. This is a common solving technique for harder puzzles, helping you eliminate impossible options through logical deduction.
Sudoku effectively trains logical reasoning, concentration, and working memory. Studies show regular Sudoku play helps keep the brain active and improves problem-solving skills.
