Sudoku 1.1

Sudoku is a computer version of a popular puzzle. You are offered the opportunity to solve an unlimited number of classic Sudoku of varying complexity. You can manually specify the number of open digits. If you are not sure of the correctness of the decision, you can first make a note with a pencil, and only then write everything with a pen. You can save or load a previously saved game at any time. Sudoku is considered solved if all the cells are correctly filled with a pen.