Sudoku the number puzzle
Fill the grid so that every row, every column and every 3 × 3 box has the digits 1 to 9, each once. Every puzzle here has one solution and can be solved by logic alone — no guessing.
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Puzzle
0:00Pick a square, then a digit. ✎ Notes writes small digits. Two equal digits in a row, column or box turn red. Keyboard: arrows, 1–9, Delete, N for notes.