Nonogram Game

How to Play Nonogram

A Nonogram is a grid solved from the number clues along its rows and columns. Each clue lists the lengths of consecutive filled blocks, in order. Separate neighboring blocks with at least one empty square. For example, 2 1 means a block of two filled squares, at least one space, then one filled square. A clue of 0 means the whole line is empty.

Select Fill to fill a square, Mark to place an × on an empty square, or Erase to return it to undecided. Tapping a square with the same tool again clears that mark. Marks help your reasoning and do not count as filled blocks. Right-click also marks a square empty. Use Undo to restore your most recent square change.

Every puzzle is checked for one solution from its row and column clues. A line’s clue is underlined when its currently filled blocks match, but the other direction may still require changes. The puzzle completes when every filled block matches both sets of clues; remaining empty squares are then marked automatically.

Solve Lines by Overlap

On a five-square row, a clue of 5 fills every square. A clue of 3 can start at the first, second or third square; the middle square is filled in every possibility. This shared overlap lets you enter part of the answer before knowing the complete block position.

On a five-square row, the clue 2 2 fills two squares, leaves one empty, then fills two more. The blocks and required gap use the whole line, leaving no alternative position. Once a row supplies new information, inspect the crossing columns for another forced fill or empty space.

Check marks entered fills or empty marks that disagree with the unique solution, while leaving undecided squares alone. Hint reveals one square as filled or empty. Hints and Undo are recorded as aids; they do not prevent a completion from being saved. The game has no penalty for correcting an ordinary entry.

Daily Picture Logic, Practice and Keyboard

Easy uses a 5×5 grid, Normal 7×7, and Hard 8×8. These compact sizes keep the square controls usable on a phone. Boards are original generated logic patterns, and are not guaranteed to depict a named object. Choose another practice board whenever you want a new challenge.

Daily uses a repeatable puzzle for the UTC date and selected level. Practice creates new boards and saves separately. Your fill marks, empty marks, last undo step and active playing time are saved in this browser. The clock pauses while the tab is hidden. Local records do not transfer to another browser or device.

Arrow keys move around the grid. Enter or Space uses the selected tool; F fills a square, X marks it empty, and Backspace, Delete or 0 erases. Tab reaches Check, Hint and the tool controls. A completed daily game adds a streak day and updates the shared practice calendar. Best times use completions without aids.

Frequently Asked Questions

Do I have to mark every empty square?

No. Correctly fill every required block; the game marks the remaining empty squares automatically when both sets of clues match.

Does an underlined clue prove the whole line is final?

It means its current filled blocks match that clue. A crossing row or column can still expose a mistake, so continue checking both directions.

What does Undo change?

It restores the most recent square change, including a hint. Only one step is kept, and Undo marks the result as assisted.