Nonogram
EasyAbout easy nonograms
A5×5 grid with 50–70% of cells filled is about as gentle as nonograms get. Small grid, short clues, and enough filled cells that overlap logic alone handles most of the work. You'll often see clues like [3] or [4] on a 5-cell line, which immediately give you several guaranteed cells.
What you need at this level: overlap logic. Take each clue, slide it to its leftmost and rightmost valid positions, and fill any cells that overlap. On 5×5 grids with high fill percentages, this technique resolves most cells without help from other rows or columns.
These puzzles are sometimes called picross puzzles (the name Nintendo uses), griddlers, or hanjie. The rules are the same regardless of what you call them. Some people also search for "nanogram" or "nonagram" — same thing, just a misspelling.
Once you can clear 5×5 grids consistently, step up to medium where the grid doubles in size and edge logic starts mattering. The jump from 5×5 to 10×10 is where the puzzle gets interesting.