task: for the agent to play as 'X' and win a game of tic-tac-toe.
plan:
1. Check the board and click the proper position which is empty to newly put X mark on the board to win the game (e.g., clickxpath clickxpath //*[@id="ttt-i"])
2. Start in the middle, play defensively, play offensively, and block your opponent to improve your chances of winning
3. You should select the position if you can directly win by doing that
3. Repeat these until win