Modular Line Sudoku
The rule: On a cyan line, every three in a row include one digit from each of 147, 258 and 369.
Play unlimited Modular Line puzzles free — every one generated with a unique solution, rated by the solving techniques it actually needs.
- Four difficulties, from gentle to expert
- Step-by-step hints that teach, not just tell
- Interactive lessons and a daily race
- Make and share your own puzzles