Tic-tac-toe is a classic board game that consists of a board of 3 by 3 squares. Two players choose one symbol each (X or O) and alternate moves, marking their choice on an empty space on the board. The objective of the game is to get three identical symbols in a line, either vertically, horizontally or diagonally, before your opponent. The player who reaches this condition first wins the game. If all the spaces on the board are filled and no player gets the required sequence of symbols, the game ends in a draw. Tic-tac-toe is a simple game, easy to learn and ideal for playing anywhere, whether with friends, family or even alone.