The 9 × 9 board is where most people learn Go, but its opening is quite different from the big board. The famous rule "corners, then sides, then centre" still explains where territory ends up, yet on 9 × 9 the very first move often goes straight to the centre. This article explains why, and gives a simple plan for the first ten moves.
The small board changes the geometry
On 19 × 19, the four corners are far apart; a stone in one corner hardly affects the others. On 9 × 9, everything is close. The centre point, e5, is only four lines from every edge. A stone there touches every part of the board: it supports your future corners, it restricts your opponent's, and it makes the stones around it safer.
That is why many strong players open with e5 on the small board. It is not a rule, but it is a very strong default for beginners.
Typical first moves
- Black e5 (the centre): flexible and powerful. White usually answers by approaching it from a side or by taking a point near a corner.
- 3-3 points (c3, g3, c7, g7): secure, low, territorial. On 9 × 9 they are quite low.
- 3-4 points (for example c4, d3): a middle ground between security and influence.
On 9 × 9 the star points and the 3-3 points are the same distance from the edges — the 3-3 points are the star points. That is another way the small board is different: there is no room for separate "influence" and "territory" lines as on 19 × 19.
Contact comes early
On the big board, the first dozen moves may never touch. On 9 × 9, stones touch within the first few moves. That means the opening is really a series of small fights. The key questions become:
- Which of my stones is weakest right now?
- Can I cut my opponent's stones apart?
- Where can I make a group that is sure to live?
Opening knowledge on 9 × 9 is mostly fighting knowledge: good shape, connections and knowing when a group is safe.
A simple plan for Black
- Play e5.
- When White approaches, answer from the side that keeps your stones connected and pushes White toward the edge.
- Build a wall facing the side where White is weak, and then turn that wall into territory by extending to the edge.
- Keep your groups connected. On 9 × 9, a single cut often decides the game.
A simple plan for White
White is moving second and receives 7.5 komi on this site. White does not need to win every fight — only to keep up.
- Take a corner-side point away from Black's centre stone, where you can make a living group easily.
- Make one group clearly alive early.
- Reduce Black's area rather than trying to kill everything.
- Count. With komi, a small but safe position is often enough.
Common 9 × 9 opening mistakes
- Playing too low. Several second-line stones early leave the centre to your opponent.
- Making two weak groups. On such a small board, two weak groups usually means one dies.
- Ignoring cuts. A cutting point on 9 × 9 is almost always important.
- Playing too slowly. Solid moves are good, but three stones next to each other in one corner give the rest of the board away.
Practising the 9 × 9 opening
Play many games against the computer on the home page and try both e5 and a corner opening as Black. Notice how the games differ. Then try the same against friends on the online page. If you sign in on your account, your games are saved: replay the first ten moves of your losses and ask which group became weak first.
Moving on
Once 9 × 9 openings feel natural, the next step is opening on 13 × 13, where corners and sides start to behave like the full board. The general ideas are in Go opening principles.
A sample sequence to try
Here is a simple way to explore the centre opening against the computer. As Black, play e5. If White approaches from one side — for example near the lower right — answer by placing a stone that keeps your centre stone connected toward the opposite side, so that White's approaching stone has to make life near the edge. As White tries to live, keep your stones connected and build a wall facing the other side of the board. When White's group is settled, turn around and use your wall to claim the side White is not on.
You will not always succeed, and the computer will sometimes invade the area you were building. But after a few games you will notice a pattern: when your centre stone and your wall stay connected, you usually win; when White manages to cut through the middle, you usually lose. That single observation is most of 9 × 9 opening strategy.
When the centre opening goes wrong
The centre stone is strong only while it stays connected to your other stones. If White manages to place stones on both sides of it and cut it off from the edges, it can become a floating weak stone. Beginners sometimes play e5 and then scatter their next moves in different corners, leaving the centre stone alone. The fix is simple: after e5, make your next moves work with it — extend from it toward a side, or answer approaches in a way that keeps it linked to your future territory.
Counting on 9 × 9
Because the board is small, you can often count the game roughly after the opening. With 81 points and 7.5 komi, Black needs about 45 points of area to win. Knowing this helps you decide whether to play safely or take risks: if you are clearly ahead, keep your groups solid; if behind, look for a fight.
Frequently asked questions
Is e5 always the best first move on 9 × 9?
It is a very strong and popular move, but not the only good one. Corner openings are also played.
Why does White get 7.5 points on 9 × 9?
Komi compensates for Black moving first. On this site it is 7.5 on every board size.
Do joseki apply on 9 × 9?
Rarely. The board is too small for most corner sequences to play out as on 19 × 19.
Should I try to kill every white group as Black?
No. Keep your own groups safe and make sure your area is larger than White's plus komi.
How long is the opening on 9 × 9?
Often only five to ten moves before the middle-game fights begin.
