Fetures:
* Mutiple sizes, from 5x5 to 25x25
* Endless puzzles, you never run out of them
* Auto fill the empty blocks when you have filled all the blacks
* Smooth and convenient zoom operation
* Dark mode
* Multiple languages support


You have a grid of squares, which must all be filled in either black or cross. Beside each row of the grid are listed the lengths of the runs of black squares on that row; above each column are listed the lengths of the runs of black squares in that column. Your aim is to fill in the entire grid black or cross.

Normally, puzzles of this type turn out to be a meaningful picture of something once you've solved them. However, since this version generates the puzzles automatically, they will just look like random groupings of squares. Someone has suggested that this is actually a good thing, since it prevents you from guessing the colour of squares based on the picture, and forces you to use logic instead. The advantage, though, is that you never run out of them.