As the cards are displayed face-up, look out for the bomb(s). When the cards turn face-down, click or tap a card to turn it over. Don’t click on the bombs!
Fill in the squares with 1 to 9 according to the following rules: 1) The numbers in each row, column, or diagonal must not be repeated. 2) The numbers in each 3×3 square (surrounded by thicker borders) must not repeat.