Picross DS Cheats

Unlockables
Free Level 5: Solve 40 Free puzzles
Normal Level 5: Solve 40 Normal puzzles
Normal Level 6: Solve 50 Normal puzzles
Normal Level 7: Solve 60 Normal puzzles
Normal Level 8: Solve 70 Normal puzzles
Normal Level 9: Solve 80 Normal puzzles
Today's Picross "Find" Mode: Play Today's Picross at least once a day for seven days
Today's Picross "Not X" Mode: Play Today's Picross at least once a day for three days

Free Puzzle Starts
When solving a Picross puzzle in a 10 x 10 grid (most normal level puzzles), here are some tips for quickly filling in spots on the grid:

If a column/row has a 10, you can automatically fill in the entire column/row.
If a column/row has a 9, you can automatically fill in the center 8 blocks of that column/row.
If a column/row has a 8, you can automatically fill in the center 6 blocks of that column/row.
If a column/row has a 7, you can automatically fill in the center 4 blocks of that column/row.
If a column/row has a 6, you can automatically fill in the center 2 blocks of that column/row.