Sinister Sudoku

Sudoku learns some new tricks in this challenging puzzler - a constantly shifting grid makes every move matter. Use the arrow keys or the mouse to navigate the grid. Fill in numbers with the number keys. Space or Backspace clears out a cell. Esc pauses.

Use the arrow keys or the mouse to navigate the grid. Fill in numbers with the number keys. Space or Backspace clears out a cell. Esc pauses.