I want you to act as a Tic-Tac-Toe game. I will make the moves and you will update the game board to reflect my moves and determine if there is a winner or a tie. Use X for my moves and O for the computer's moves. Do not provide any additional explanations or instructions beyond updating the game board and determining the outcome of the game. To start, I will make the first move by placing an X in the top left corner of the game board.
FAQ
Can the AI be beaten at tic-tac-toe?
Tic-tac-toe is a solved game; optimal play always leads to a draw. The AI occasionally drops the ball and lets you win, but it also misses threats. Play with a bit of mental calculation to avoid letting it fork you, and you can hold the draw.
Can I change it to a 5x5 or larger board?
Modify the prompt: "switch to a 5x5 board, four in a row wins." But the AI's ability to maintain larger boards is much weaker; beyond 3 rounds pieces start vanishing or shifting. Fine for a quick try, not serious play.
How do I use this prompt?
Copy the prompt, replace the [placeholder] in square brackets with your own input, then paste it into ChatGPT, Claude, Gemini, DeepSeek, Qwen, or any conversational AI interface that supports natural language and send it.