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Winning Tic-Tac-Toe Every Time

Tic-tac-toe looks like a lucky game. It is not!

It is a solved game. That means if you know the plan, you will never lose — you win or you draw. Today you learn the plan.

Your promise by the end:

🛡️
Never lose
🪤
Set traps
🏆
Win more
Quick reminder: you win by getting three of your marks in a row — across, down, or slanted. Tap Next to see every way that can happen.

Step 1: Know your 8 roads

There are exactly 8 ways to make three in a row: 3 across, 3 down, 2 slanted. Champions see all 8 at once.

Tap each faint line to light it up. Find all 8!

Found 0 of 8

Notice: the middle dot sits on 4 of those roads. Remember that — it is the secret of Step 2!

Step 2: Grab the centre

Every square is on a different number of winning lines. More lines = more power.

Tap a square to see how many winning lines pass through it.

4
Centre 💪
3
Corner 👍
2
Edge 😐
Golden rule 1: If you go first, always take the centre. If your friend takes the centre first, take a corner.

Step 3: Win first, block second

Before every move, ask two questions in this order:

  1. Can I win right now? → Play it. Game over. 🎉
  2. Can my friend win next? → Block that square. 🛡️

Never block when you can win — winning ends the game immediately!

You are X. Puzzle 1 of 3 — what is your move?

X = you O = your friend

Step 4: The fork — the trap that wins

A fork is one move that makes two threats at the same time. Your friend can only block one… so you win with the other!

Watch a fork being built. Tap the button to step through it.

Start: X has the centre and a corner. O is on an edge.

Golden rule 2: two threats beat one blocker. Always hunt for the move that makes two lines of two.

Step 5: Your turn to fork

You are X. Nobody can win this turn. Find the one empty square that gives you two ways to win next turn.

Hint: think about the corners.

Careful: if your friend is about to fork you, don't just block one side — make a threat of your own so they must answer you instead.

Step 6: Try it for real

Play against Robo-O 🤖. It follows the same rules you just learned, so the best you can get is a draw — and that is a win for your brain!

You are X — you go first

Wins 0 · Draws 0 · Losses 0

🎉 You did it!

You now know the whole plan. Follow it in order, every single move:

1. Win. Two of yours in a line with a gap? Fill it. Game over.
2. Block. Two of theirs in a line with a gap? Block it now.
3. Fork. Play a square that makes two threats at once.
4. Stop their fork. Make your own threat so they must block you.
5. Centre. Take it if it is free — it sits on 4 winning lines.
6. Opposite corner, then any corner, then an edge.

Remember the champion's whisper:

“Win, block, fork, centre, corner.”

Two clever players will always draw — so if the game ends in a tie, you both played perfectly. Now go and teach a friend! 👑