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About Sudoku
Sudoku is the defining number placement puzzle of the modern era, requiring you to fill a 9x9 grid so every row, column, and 3x3 box contains the digits 1-9 exactly once. Despite using numbers, Sudoku requires zero arithmetic — it's a pure logic puzzle that rewards constraint satisfaction and methodical elimination. Expert solvers use chains of advanced techniques including X-wings, swordfish patterns, and forcing chains to crack the hardest 'evil' difficulty puzzles that simpler strategies cannot resolve. The puzzle's elegant constraint structure means that a correctly solved Sudoku has been mathematically proven to have exactly one solution for any well-formed puzzle.
🎮How to Play Sudoku
- 1The 9×9 grid is divided into nine 3×3 boxes.
- 2Some numbers are already filled in as clues.
- 3Fill in the remaining cells so that every row, column, and 3×3 box contains digits 1 through 9 — no repeats.
- 4Click a cell then tap a number to place it.
- 5Use logic and elimination — never guess!
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