Game · Board · vs CPU
Tic-Tac-Toe
Play Tic-Tac-Toe against the computer. Take turns marking squares; the first to get enough marks in a row wins. Choose a board size from the classic 3×3 up to 8×8 — you need 3 in a row on 3×3, 4 on 4×4, and 5 in a row on any larger board — play as X or O, and set a CPU level from 1 (gentle) to 10 (tough).
You play X by default and move first. Tap any empty square to place your mark. Get enough in a row to win — 3 on the classic 3×3, 4 on 4×4, and 5 in a row on bigger boards. On 3×3 the CPU at level 10 is unbeatable; pick a bigger board or a lower level for a more open game.
ThinkTraits— 08