Sudoku

Sudoku — place 1 to 9 in every row, column and box. Four difficulties from easy to expert, pencil marks, mistake checking, unlimited fresh boards.

A clean, fast, single-file browser game. No account, no ads, no tracking, works offline once loaded. Keyboard and touch friendly.

Buy once for $1 to download the standalone build and support development. Made by a civil engineer who builds games and simulations on the side; more at boardgaminghub.com.