Anti-Factor Line Sudoku
The rule: On an anti-factor line of length L, no digit other than 1 is a factor or multiple of L, and the digits sum to a multiple of L. Digits may repeat if the other rules allow.
Play unlimited Anti-Factor 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