For the more difficult puzzles you can get help like:
  • X-Wing strategy.
  • Simple colouring chaining strategy.
  • XY-Wing strategy.
  • X-Cycles strategy.
  • True-false chain strategy.
  • Forced chain strategy.
  • Swordfish strategy.
  • Let the program generate puzzles with a suitable level of difficulty.
  • Enter your own puzzles from newspapers or magazines.
  • Save and load puzzles at any time.
  • Get as much help as you want from the program.
  • Unlimited 'undo' and 'redo' puzzle moves.
  • Use "List" mode to remove cell candidates.
  • "Highlight" mode can more easily show you number/candidate patterns.