Digizzle - Puzzles with numbers blog
The program contains many useful features to make solving process more enjoyable. This is the list with some of them:
  • Unlimited undo/redo
  • Preview window
  • Rows/columns status
  • Informative tooltips
  • Highlighting for completed rows/columns
  • Save and restore current game state (including history of all moves oops! it’s currently broken
  • Marks