Dots and boxes
Dots and boxes is an easy fun game to play, it was played before using pencil and paper that how the french mathematician described it. this game is known by many other names like boxes, squares, dot to dot grid, pipopipette, Dots game.
Dots and boxes game can be played by 2 players or more, it starts with an empty grid of dots, players take turns joining 2 dots to form a line vertically or horizontally the player that completes the fourth side of the box earns the box as a point, the game ends when all lines are drawn and boxes are claimed by players. the winner is the player that has more boxes.
The most useful way to win the game is to offer the opponent a short chain of boxes, and by doing that you leave no chance for the opponent but to create a long chain for you.