Sudoku – Classic Number Puzzle

A classic sudoku with the soul of a paper puzzle.

The givens are printed in crisp type; your answers go in with a handwritten pencil touch. It feels less like a screen and more like the puzzle page of a morning paper.

◆ WHY YOU'LL LIKE IT
- Quiet, focused solving — no flashy effects
- Build a daily brain-training habit, one puzzle a day
- Pure sudoku: no hints, no hand-holding

◆ FEATURES
- Four difficulties: Easy, Medium, Hard, Expert
- Every puzzle has exactly one solution — solvable by logic alone
- Daily Puzzle: the same board for everyone, playable only that day
- Attendance-style streaks with a calendar record
- Pencil notes, undo and redo
- Same-number and row/column/box highlighting
- Duplicates turn red — but the answer is never given away
- Best and average times per difficulty, plus separate no-notes records
- Game Center leaderboards: best times and a daily ranking
- Fully playable offline

Open today's puzzle and start your streak. All you need is a pencil.