Interactive Sudoku
Difficulty Level: Tough 39 [39 cells to fill]
Looking for a real challenge? Interactive Sudoku – Tough 39 is designed for seasoned solvers who love logic, focus, and mental finesse. With only 39 cells to fill in per puzzle, every move counts. No fluff, no distractions — just pure logic, clean interface, and offline play.
- Minimalist 9x9 grid interface
- Keyboard or mouse input
- Offline — no internet needed
- Works on Windows 10/11 (macOS not supported)