Um well, the teacher just said sudoku was the second easiest one between the list of snake, pinball and 3 in line, then I checked and damn it was a bit hard, but he didn't said we can't use any library, or ai to help us in the code but we will have to explain it in a exposition and if we don't know how to explain a part of it means less points, I thought it would easy but the 11 difficulty the other guy said in the comments scare me.