Practice
Time-based Sudoku Challenge — sample puzzles from the books
Level 2
To Mars
Puzzle #5 · multiplier ×1
Level 5
To Ceres
Puzzle #17 · multiplier ×2.5
Level 8
To Uranus
Puzzle #29 · multiplier ×5
Time-based Sudoku Challenge — sample puzzles from the books
To Mars
Puzzle #5 · multiplier ×1
To Ceres
Puzzle #17 · multiplier ×2.5
To Uranus
Puzzle #29 · multiplier ×5