WebTicTacToeBest Opening Moves
in Tic Tac Toe
Center or corner? Edge or diagonal? We rank all 9 opening squares by strategic value — and give you the ideal response to every opponent opening.
Quick Answer: Best First Move in Tic Tac Toe
The center square is the best first move when playing as X. It belongs to 4 winning lines — the most of any square. If the center is taken, choose a corner (3 winning lines) over an edge (only 2 winning lines). Playing an edge first as X is the weakest opening.
Opening Square Value Map
Each square ranked by the number of winning lines it belongs to. The higher, the better your opening position.
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⭐ Best
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Detailed Opening Analysis
X plays center
Center — 4 Winning Lines
The center is part of all 4 winning line types: middle row, middle column, top-left diagonal, and top-right diagonal. No other square compares.
Best O response: Any corner
O should NOT take an edge after X takes center — it allows an easy fork for X.
X plays corner
Corner — 3 Winning Lines
Each corner belongs to 3 winning lines (one row, one column, one diagonal). A corner start is dangerous for O — X can build a fork easily if O doesn't respond correctly.
Best O response: Take the center immediately
If O doesn't take center after X takes a corner, X can almost guarantee a win with perfect play.
X plays edge
Edge — 2 Winning Lines
Edge squares (top-center, left-center, right-center, bottom-center) only belong to 2 winning lines. This severely limits fork opportunities and gives O an easy path to a draw or even a win.
Best O response: Take center, then a corner
With correct play after an edge opening, O can guarantee a draw against any X strategy.
Optimal Opening Response Guide
| X's Opening | O's Best Response | Why | O's Outcome |
|---|---|---|---|
| Center | Any corner | Prevents edge-fork traps; opens counter-threats | Draw guaranteed |
| Corner | Center (immediately) | Without center, X can force an unstoppable fork by move 3 | Draw guaranteed |
| Edge | Center, then corner | Edge is weakest; center dominance negates X's limited position | Win possible |
Common Opening Mistakes to Avoid
O taking an edge after X takes center
If X takes center and you take any edge, X can create an unstoppable fork on their third move by taking two corners. Always take a corner as your first response to a center opening.
O not taking center after X takes a corner
If X opens on a corner and you don't immediately take center, X will take an opposite corner and threaten a diagonal while setting up a fork. The center is mandatory after a corner opening.
X starting on an edge
Edge openings have only 2 winning lines and are very hard to convert into wins. A skilled O can guarantee a draw from almost any X edge opening. Never start with an edge if you're trying to win.
Frequently Asked Questions
What is the best first move in Tic Tac Toe?
The center square is the best first move as X. It controls 4 winning lines — the most of any position. If the center is taken, go to a corner (3 lines), never an edge (only 2 lines).
Is center or corner better in Tic Tac Toe?
Center is better as a first move for X — it has more winning lines and more fork possibilities. However, when playing as O responding to X's corner opening, taking center is your priority, not the corner.
Why is the edge the worst opening move?
Edge squares only belong to 2 winning lines — far less than the center (4) or corners (3). This severely limits fork creation and leaves X with very few ways to create winning pressure. Skilled opponents will easily draw against any edge opening.
What should O do if X opens in the center?
O should take any corner — not an edge. Taking an edge after X's center move allows X to set up an unstoppable fork by taking two corners on move 3. A corner response by O is the only way to guarantee a draw.
More Strategy Guides
Apply These Openings Now
Practice the center and corner openings against our AI — try to build a fork within 3 moves.