
Sudoku
Classic 9x9 number puzzle with three difficulty levels and pencil marks
Sudoku is the timeless logic puzzle that fits any moment. Fill the 9x9 grid so every row, column, and 3x3 box contains the digits 1 through 9 exactly once - no math, only deduction. Choose Easy, Medium, or Hard to match how sharp you feel, then use pencil marks to track candidates before committing a value. Newgame.win's Sudoku runs entirely in your browser, autosaves your progress, and supports both mouse clicks and keyboard input. Spot a hidden single, lock down a naked pair, or chase an X-wing - every solved puzzle trains a little more pattern recognition. No signup, no ads in the grid, no countdown timer; play one round on a coffee break or work through a Hard board over the evening.
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