Once several numbers are revealed, you can deduce where the bombs are, and can mark squares accordingly. You can mark a square with a question mark if you are not sure and want to come back later. This ancient Chinese board game has been popularly marketed as Othello. You take turns surrounding the opponent's pieces in a line. When surrounded, the color changes, and they temporarily become yours.
Colors change back and forth often as the game progresses.
At the end, the side with the most pieces when the board is full wins. The computer can play from four levels of difficulty on an 8 x 8 board. Sink the Ships. Start by placing five various-sized linear ships on a 11 x 11 grid. Then hunt down your opponent's ships while he tries to guess the location of yours.