Pick X or O before the round starts. X always makes the first move, so the computer opens if you choose O. Then click a free square whenever it's your turn and keep building. Every move stays put, and the board slowly turns into a proper little puzzle.
- Pick X to start, or O to let the computer make the opening move.
- Place your mark in any empty square when it's your turn.
- Chase your line of five, but don't ignore the computer's plan.
- Board turned into a mess? Hit New Game and go again.
The rules, short and sweet
It's a 10 by 10 board. Put five of your marks together in one straight line and the game is yours. Six or seven in a row also work — five are hiding inside them anyway.
- Your line can run sideways, straight down, or diagonally.
- Once a square is taken, it's taken. No do-overs.
- X always opens; after that, you and the computer take turns.
- The moment somebody gets five in a row, that's game over.