Game · Logic · 4×4–9×9
Sudoku
The classic number puzzle. Fill the grid so that every row, every column, and every box contains each digit exactly once — using logic alone, no guessing needed. Tap a cell and a number to fill it, or pencil in notes while you work it out. Choose your board size (4×4, 6×6, or 9×9) and a difficulty from easy to hard.
Pick a board from 4×4 up to the classic 9×9, and a difficulty from easy to hard. Wrong digits are flagged and counted as mistakes; use notes and hints if you get stuck.
ThinkTraits— 08