Russian Minesweeper Game

The game "Russian Minesweeper" is a famous puzzle game with a minefield and mines located on it. The player has to find all the mines on the field and open all the empty squares on the playing field, which have no mines. The game has 3 modes of difficulty, namely: Beginner, Amateur, Expert. Difficulty depends only on the number of mines on the field, a beginner - 10 min, amateur - 20 min, expert - 25 min on the playing field, and the field itself always has the same size.