Tic Tac Toe
Play X against an AI opponent on a board that starts at 3x3 and expands up to 6x6 as you win. Build win streaks for higher scores and bigger challenges.
Play NowAbout
A strategic twist on the classic game. You play as X against an AI opponent. Win a round and the board grows — from 3x3 to 4x4, then 5x5, and eventually 6x6. Larger boards require longer lines to win (three on small boards, up to five on 6x6).
The AI adapts to each board size. On 3x3, it plays loosely and makes occasional mistakes, giving you a fair chance. On larger boards, it tightens up significantly, using deeper analysis. Building consecutive win streaks multiplies your score, but one loss resets your streak.
How to Play
Desktop Controls
- •Click on any empty cell to place your X
- •Get three (or more, on larger boards) in a row to win
- •The AI plays O after each of your moves
- •Win to grow the board; lose or draw to keep the current size
Mobile Controls
- •Tap on any empty cell to place your X
- •Get three (or more, on larger boards) in a row to win
- •The AI plays O after each of your moves
- •Win to grow the board; lose or draw to keep the current size
Pause Controls
- •Press P or Esc to pause the game
- •On mobile, tap the pause button in the top-right corner
- •Resume, restart, or switch games from the pause menu
Difficulty
The board grows from 3x3 (connect 3) up to 6x6 (connect 5) as you win rounds. The AI blunders about 40% of the time on 3x3 but only 8% on 6x6. Larger boards also require longer lines, making wins harder to achieve.
Scoring
Each win earns 500 points plus 200 for each consecutive win in your streak. A loss resets the streak counter. Draws do not break your streak but award no points. Your personal best and last five scores are stored locally in your browser.
Pro Tips
- 1On 3x3, take a corner first — it gives you the most winning paths
- 2Watch for double threats where you can win in two places at once
- 3On larger boards, build lines along edges where the AI has fewer blocking options
- 4A draw keeps your streak alive — don't take unnecessary risks
- 5The AI thinks harder on bigger boards, so plan further ahead
Accessibility
Click or tap to place your mark — no keyboard controls needed. The board, cells, and marks scale to any screen size. Win lines are animated for clear feedback.