The puzzles are randomly generated, so you never play the same game twice. And all puzzles have a unique solution. You can quit a game at any time and continue later - the game state including undo/redo will be restored.
Features:
- 4 levels of difficulty.
- Save/Restore helps you to try alternative ways.
- Undo/Redo with virtually unlimited levels.
- Mark up candidate numbers, or
- enable automatic candidate list.
- Choose subscript or dot notation mark-up.
- Show conflicts.
- Highlight digits.
- Easy touchscreen operation with drag & drop.
- Best times table.
English
