Super Tic-Tac-Toe Strategy: Sending, Free Moves and Win Streaks

Updated October 2026

Super Tic-Tac-Toe looks like a toy until you lose your first match to it. On the surface you are just drawing crosses, but each cross also acts as a set of directions for your opponent, and the computer reads those directions very carefully. Your score here is not a points total but a run of consecutive wins, so a single loss or even a draw wipes it out. This guide walks through what the code actually checks on every move, how the computer opponent decides, and the habits that turn a fragile run into a long one.

What the game checks on every move

The playing field is 81 cells: nine small grids, each three by three, arranged in a large three by three. You always play crosses and always move first, in every match. When you tap a cell, the game records it, then looks at the small grid you played in. If you have three in a line there, that grid becomes yours. If the grid is now completely full with no line, it is marked as dead and belongs to nobody for the rest of the match.

Next comes the part everything depends on. The position of your cell inside its little grid is translated directly into a position on the big grid. Playing the lower-left cell of any small grid sends the computer to the lower-left small grid. If that destination is still open, it is the only grid the computer may use. If it has already been won by either side or has died full, the computer may instead pick any open cell in any open grid. The same rule then applies to you on the reply. The grids you are allowed to use are tinted green on your turn.

A match ends the moment someone owns three small grids in a straight line on the big grid. If no legal move remains first, the match is a draw. There is no tiebreak by counting captured grids: owning five grids and losing nothing still counts as a draw if none of them line up.

How your score and the opponent are linked

Each win adds one to your streak and offers a Start button for the next match, keeping the streak. A loss or a draw ends the run; the final card shows the streak you reached and, if it is above zero, lets you send it to the Hall of Fame. Your best streak is stored on your device as soon as it is beaten, even mid-run. Pressing New at the top during a run resets the streak to zero, so treat it as resignation.

The computer looks ahead a fixed number of moves, and that number depends on two things. The first is how many options it has: with more than 18 legal moves it searches four moves deep, with 10 to 18 it searches five, and with nine or fewer it searches six. The second is your streak. In your first match it subtracts two from that depth, after one or two wins it subtracts one, and from three wins onward it plays at full depth. It never searches fewer than two moves. In practice the early matches are a warm-up, and the opponent you face from the fourth match on is the real test. It does not get any stronger after that, so the difficulty is set by the moment you reach a streak of three.

Its judgement of a position also tells you what it values. It scores captured grids by location, counting the centre grid three times as heavily as an edge grid and corners twice as heavily. It strongly rewards two captured grids in a line with the third still open, and it gives a small bonus for holding the centre cell of an unfinished grid. Expect it to fight for exactly those things.

Thinking in destinations, not cells

The single most useful habit is to read each candidate cell as an address. Before tapping, look at the grid the cell points to and ask what the computer can do there. Can it complete a line in that grid? Can it set up two in a row that you will be forced to answer? Does that grid sit on a big-grid line where the computer already owns a square? If any answer is yes, check the other empty cells in your current grid, because each one points somewhere different.

A related idea is the return trip. If you send the computer to the top-middle grid, wherever it plays there sends you back to a grid of its choosing. A strong move often sends the opponent into a grid where every one of its replies points you towards a grid that is good for you. You cannot always find such a move, but asking the question each turn makes the game far more readable.

Notice also that a cell in a grid can point back to the same grid. Playing the centre cell of the centre grid sends the computer straight back to the centre grid. Repeatedly playing such self-pointing cells keeps the action on one board, which is useful when you are ahead there and dangerous when you are not.

The free move is the most valuable thing in the game

When you send the computer to a grid that is already decided, it gets to play anywhere. A free choice lets it attack whichever grid helps it most, so giving one away is usually the worst error available to you. As the board fills, more grids are finished and more of your cells point at them, so the danger grows in the middle and late game. Keep a mental list of which positions are now poison: if the top-right grid is decided, every top-right cell in every grid now hands out a free move.

The reverse is just as important. When you earn a free move, do not spend it on the first thing you see. Good uses are completing a grid that also gives you two in a line on the big grid, blocking a grid the computer is about to win, or playing a quiet cell whose destination traps the opponent. A free move that sends the computer back into another free move wastes your advantage immediately.

Which grids to fight for

The centre grid belongs to four winning lines on the big grid, each corner grid to three, and each edge grid to two. Owning the centre therefore keeps the most plans alive, and the computer's own scoring shows it knows this. Corners come next. Edge grids are worth winning when they complete or block a line, but they rarely justify a long fight on their own.

Sometimes the right decision is to let a small grid go. If the computer is clearly going to win a grid, playing there again only helps it if your cell sends it somewhere bad. You can often gain more by using those moves to point the opponent at harmless destinations while you build elsewhere. A dead grid is also a weapon: once a grid is full with no winner, it blocks every big-grid line through it for both sides, which can be exactly what you need to kill a computer threat.

Common mistakes

• Winning a grid and losing the war. The cell that completes your line also sends the opponent somewhere. Check that destination before celebrating, especially if it is a free move.
• Ignoring big-grid twos. When the computer owns two grids in a line with the third undecided, every move that sends it to that third grid is a potential loss.
• Accepting a draw as safe. A draw ends your streak exactly like a loss. Late in a match, push for a line rather than shuffling cells.
• Rushing. There is no clock. The computer takes a short moment to answer, and you can take as long as you like.

A plan for longer streaks

1. Use the first three matches, where the computer searches less deeply, to practise reading every move as an address. Say the destination grid to yourself before tapping.
2. From the fourth match, slow down. Before each move, list which grids are finished and therefore which cell positions give away a free move.
3. Prioritise the centre grid and corners, and treat any computer pair on the big grid as an emergency.
4. After a loss, replay the last few moves in your head. Most losses trace back to one cell that pointed the opponent at a grid it could win, or to a free move given away.

Long runs come from patience rather than clever traps. If you avoid handing out free moves and always check the address of your cell, the computer has far fewer chances to punish you.