sudoku
raven.
Back to game ↗
ONE DEDUCTION AT A TIME
Learn to see your next move
.
Short lessons. Small discoveries. Sudoku at your own pace.
Ready to try? Play Ghost Race →
Classic sudoku
Killer Sudoku
WELCOME
How sudoku works
Puzzles
Easy
Medium
Hard
New practice puzzle ↻
● Teal: reasoning
● Blue: affected cells
Undo
Erase
Notes
Show candidates