This solution is generated by ChatGPT, correctness is not guaranteed.

AI solution for System Design on BFE.dev
19. Design a Tic-Tac-Toe game

As an AI language model, I cannot play the game. But, I can provide a high-level design for the Tic-Tac-Toe game. Here's one possible design:

  1. User Interface: Create a user interface that displays a 3x3 grid of squares, the goal of the game is to get three X's or O's in a row, horizontally, vertically or diagonally.

  2. Board Representation: For an efficient way to keep track of the game state, represent the board as a 2D array. The value in each cell can be 'X', 'O', or empty.

  3. Game Logic: Use JavaScript or any language of choice to implement the game logic that manages users' turns, checks for winning conditions, and updates the board accordingly.

  4. Computer Player: By implementing a difficulty level using Artificial Intelligence algorithms, an AI Player can be designed to play against human players.

  5. Multiplayer Support: The game can be designed to offer connections to people online so that two players can compete regardless of their physical location.

  6. Other features: Players can customize their "marker" visualization (e.g., using an icon, uploading an avatar, etc.). Additionally, features like game replays, game summaries or leaderboards, can be added to make the app engaging and fun to use.