Nonogram is a browser picture-logic puzzle where the picture appears only after the clues make sense. Each row and column has numbers. Those numbers tell you how many filled cells belong in that line, and separated numbers need at least one clear cell between them.
Start by finding the biggest clues. A large run has fewer possible positions, so it often tells you safe cells before small clues do. If a row has a run that almost fills the row, imagine the run pushed all the way left, then all the way right. Any cells covered in both positions are safe to fill.
Do the same check in columns. A row can make one cell look likely, but a column can confirm it. The strongest fills are the ones that have a reason from both directions. When you are unsure, stop before filling and see whether the crossing column agrees with the move.
Marks are as important as fills. Use Mark for cells that must be blank or that you want to rule out while reading a line. A marked blank keeps you from accidentally extending a run through a space that should separate two clue numbers. In a small puzzle, one clean blank can be as useful as one filled square.
Read separated clues as groups. A clue like two runs is not one long block. There has to be at least one clear cell between the groups. If the first group can only fit in the first half of the row and the second group can only fit near the end, mark the gap once you know it cannot belong to either run.
Avoid guessing when a line still has several shapes. Guessing can create a picture that looks plausible but breaks a column later. Instead, switch to a line with more information. A row with two confirmed fills and one marked blank is usually easier than a totally empty row with a small clue.
Use Clear when a cell was tested too early. If a fill no longer makes sense after checking the crossing clue, remove it rather than building around it. A single wrong fill can make several later decisions look reasonable, so it is cleaner to correct the board as soon as the conflict appears.
Keyboard play can help when you want precision. Move with the arrow keys, then use the Fill, Mark, Clear, and Space controls to act on the current cell. Touch and pointer play are faster for broad areas, but keyboard movement is useful when you are checking a tight crossing one square at a time.
Restart clears the current picture, while New puzzle rotates through original local picture grids. Your best move count saves on this device after a completed picture, so a second solve can be a cleaner logic pass. A better count usually comes from fewer uncertain fills, not from rushing the first move.
Try one puzzle with this rule: every filled cell must answer a sentence. For example, “this cell is filled because every possible position for this row’s run covers it.” If you cannot explain the fill, mark what you know instead or move to another line.
For another clue-reading puzzle, try Minesweeper and use each number to separate safe cells from mines. If you want a word-grid version of crossing logic, open Crossword and let confirmed letters unlock harder clues.