Daily Nonogram

How to play here

1. Choose a size: 10 × 10 or 15 × 15. Each size is its own puzzle with its own saved progress.
2. Choose a tool. Fill paints a cell; Cross marks a cell that you know is empty.
3. Tap or click a cell to use the tool. Using the same tool on the cell again removes the mark.
4. Clear cell removes the mark of the selected cell. Undo takes back one change at a time. Restart empties the board and resets the time; on a solved puzzle it also removes the solved mark.

A clue is struck through when the filled groups of its line have exactly the lengths of the clue. The puzzle is solved when the filled cells form the picture. Crosses are notes for yourself and are not required.

Check compares your marks with the picture and marks filled cells that should be empty and crossed cells that should be filled.

When the puzzle is solved, Share result passes one line to the share menu of your device, or copies it: the game, the size, the day or practice number and your time, never the picture, with a link to the same puzzle.

Keyboard and mouse

Printing

The Print button below the board prints the puzzle in its start position, without your entries. Answer on page 2 is on at the start: the solution then follows on its own page. Switch it off to print the puzzle alone. Large print makes the grid as big as the page width allows; this helps most on 10 × 10 puzzles. The printed puzzle is the one shown, so only today’s puzzle and earlier ones can be printed.

Small screens and large text

A board of 15 × 15 cells does not fit a phone screen with cells that a finger can hit. With Large cells on a narrow screen the board scrolls sideways inside its frame while the row clues stay in view. The site switches this on by itself when the cells would otherwise be too small for your text size.

Move buttons adds four arrow buttons and a Use tool on cell button below the board. They move the selection and use the chosen tool, so every cell can be reached without touching the board.

How the puzzles are made

A generator draws a picture that is the same on its left and right half. A solver then works through the clues the way a careful person does: it looks at one row or column, marks every cell that is the same in all arrangements that still fit, and moves on to the next line.

The picture is published only if this finishes the whole grid. That is why no puzzle here needs a guess, and why each has only one solution. Pictures with an empty line, a completely filled line, or with less than 35 % or more than 75 % of the cells filled are discarded.

The pictures are abstract patterns. They are not drawn by hand and do not show objects.

• Nonogram rules
• Nonogram solving techniques

Example: the first moves

Start with the largest clues. In a row of 10 cells, the group of 7 covers cells 1 to 7 at one extreme and cells 4 to 10 at the other. Wherever it lies, cells 4 to 7 are filled, so fill them.

A clue that fills its line is even better: in a row of 10 cells, the clue 4 5 needs 4 cells, one empty cell and 5 cells, which is exactly 10. The whole row is decided.

Common mistakes

• Filling a cell because it looks likely. Fill only what every possible arrangement has in common.
• Forgetting the gap. Two groups in the same line are separated by at least one empty cell.
• Not using crosses. Marking known empty cells shortens the space that is left for the other groups, and that produces the next certain cells.
• Trusting a struck-through clue too much. It says that the line fits its own clue now, not that every cell of it is in the right place.