There are different strategies where you can always win in the Tic Tac Toe game. A player must make a move that will guarantee a winning end or if it doesn’t work you must know how to block your opponent to win the game.
If your opponent has the first move on the game, you must have a strategy to counter-attack their first move. The other player will either put their first mark on the center or the corners. There are different ways on how to handle each move. First, if they put a mark on any corners. If they did this move you MUST put your mark on the center otherwise you will lose the game. Once you place your mark on the center, the other player will choose to either place a mark where they will form a diagonal line or anywhere else. If they are trying to form a diagonal line, mark only the edges and never choose the corners. This game will end up in a draw or tie.
On the other hand, if the other player marks the center as their first move, you should always choose a corner space. If their next step is putting a mark on the opposite corner where you placed your mark, you must know that they are using this strategy. You must then put your next mark on any space away from your first mark. Further on the game, it will be simply blocking their move so you will have a draw or tie at the end. If in case they mark any other space not written above, you will just need to counter attack their mark by blocking them. Either way, this move will let you end in a draw.