Sudoku

Classic Sudoku, developed in Qt Creator while I was taking a C++ course.

There is an option to choose the difficulty (how many cells will be empty or filled from the start). You can also save and load game sessions.

If you select the wrong number, the field in which it is located will be highlighted in red.

Another feature is that the game can solve itself if you fail it. Interestingly, the solver module does not know the answer in advance, it having the same information as the player. It real solves the puzzle using heuristics.