FORTNITE de Minesweeper

Minesweeper-like puzzle game for one person.
You will open 64 present boxes one after another, but sometimes there will be dangerous guardians lurking, and if you open them, you will be in trouble.
The number that appears when you open the box is the number of guards hiding in the surrounding 8 squares.
The game is cleared if you open all the boxes that don't contain guards.