Sudoku
Simple Sudoku matrix. This whole application was born to actually integrate yet another library I wrote to check the correctness of the sudoku, then I added a sudoku generator. First by generating the matrix where I found that with a high probability the 6th row would never complete, adding a reset switch that would completely restart the generation in that case, and second by adding some masks I copied from the Settimana Enigmistica. With a little bit of good will I'll add other masks as I have plenty of those. (It's kind of boring as you have to copy 81 values from a piece of paper).
I really don't know if the masks are enough to provide solvability to the Sudoku, I didn't do any research on the Sudoku theoretics, I just pieced together things I already knew by completing dozens and dozens of them.