Reksarych's Sudoku (ex Sudoku)

It's classical Sudoku.

Update 08.12.2018.

Peculiar properties:
1. The game supports two languages: Russian and English;
2. The game has 5 levels of difficulty that will allow you to adjust the puzzle for yourself;
3. Each time you start a new game and select the level of difficulty, there is a procedural generation of " Sudoku";
4. For cells that need to pick up a value, you can write comments that allow you to mark the numbers that are likely to be correct;
5. The color highlights the cells in which you can write values;
6. The solution verification algorithm is designed in such a way that any correct solution will be counted.