From StrategyWiki, the free strategy guide and walkthrough wiki
This is the main play mode in Picross DS. It consists of 4 options:
- How to Play - A set of four tutorials teaching you how to play the game. It's a good idea to go through these if you've never played a picross game before.
- Easy Mode - 15 simple puzzles to get you started and show how picross puzzles work.
- Normal Mode - 150 intermediate puzzles over 10 levels; plus 3 mini games in each level.
- Free Mode - Advanced puzzles using "Free Mode" rules (you are not told when you make a mistake).