Daily Nonogram

How it works

The numbers beside a row say how many squares are filled, in order, with at least one gap between each block. A row reading 4 2 has a block of four, then a gap, then a block of two.

Fill squares by clicking and dragging. To mark a square as definitely empty, press Mark X and then click, or hold shift, or right-click. Crossing off what you have ruled out is most of the work in a nonogram.

A clue turns turquoise when that line matches, though matching does not always mean it is in the right place.

Finish it and you get a picture. Every one is drawn by hand rather than generated, because a nonogram that resolves into a shapeless blob is not worth the half hour.

Where to start

Look for the big numbers. In a row of fifteen, a block of twelve can only sit four ways, so the middle nine squares are filled whichever way it goes. That overlap is the whole technique, and it cascades.

Progress saves in this browser as you go.

Every One Can Be Solved Line by Line

A nonogram goes wrong when it forces you to guess, try a branch, and backtrack. That is not solving, it is searching, and it is no fun on paper.

So each puzzle here was tested by a solver that works the way a person does: take one line at a time, list every arrangement that still fits the clue and what is already known, and keep only the squares that agree in all of them. Repeat across rows and columns until nothing changes. If that process did not finish the grid, the puzzle was thrown away.

That also makes the answer unique, since every square it fills was forced.

More to Play

There is a daily killer sudoku and a daily thermo sudoku, plus 2048. They live on the games page. If you would rather solve something you can hold, the puzzle tools do that.