PlantUML has a fun command to create a Sudoku puzzle. We must use sudoku in our PlantUML definition and a random puzzle is generated. We can even give a seed value for a given Sudoku so it is generated again. In the following example PlantUML definition we use the sudoku command:

@startuml
sudoku
@enduml

We create a PNG file with PlantUML and we get the following result:

To regenerate the same Sudoku we must use the seed value cinnld556e0o:

@startuml
sudoku cinnld556e0o
@enduml

Written with PlantUML 8048. Original blog post