By Alexane Rose, Etienne Casanova, Ewen Fagon and Tristan Bourvon.
javadoc -link -cp *.java -d doc/
java Sudoku generate <size> <difficulty>
java Sudoku generate_check <size> <difficulty>
java Sudoku generate_solve <size> <difficulty>
java Sudoku solve <size>
size: any squared number, preferrably 4 or 9
difficulty: EASY, MEDIUM, HARD or EXTREME