The first few moves in Gomoku set the tone for the whole game. While beginners can get away with "play near the center," intermediate and advanced players quickly discover that certain opening shapes have been analyzed, tested, and refined over decades of professional and computer play.

Why the Opening Matters

On an unrestricted 15×15 board, strong AI engines and mathematical analysis agree: with perfect play, Black (the first player) has a forced win. That does not mean Black wins every casual game — humans and even strong programs make mistakes — but it means White's realistic goal is to steer the position into complicated lines where Black is more likely to slip. The opening is where that steering begins.

How Pro Openings Are Named

Professional Gomoku openings are cataloged using numeric codes. Different countries and servers use slightly different coordinate systems, but the codes are usually based on the position of the first few stones relative to the center of the board. You will see names like Opening 26, Opening 32, or Opening 44. These are not move-by-move recipes; they are families of positions that share the same first few stones and a set of known responses.

The Three Most Important First Moves

  1. The center (H8 on a 15×15 board): The most natural first move. It maximizes flexibility because a stone in the center attacks in four directions.
  2. One step off center (e.g., H7 or G8): A common alternative that keeps central influence while slightly changing the follow-up shapes.
  3. Diagonal from center (e.g., G7 or I9): Leads into many of the standard professional openings, including Opening 26.

Opening 26

Opening 26 is the most deeply studied professional Gomoku opening. Black starts diagonally off-center; White has a small set of standard replies; and the game quickly becomes tactically complex. Entire books and databases are devoted to its branches.

Beginners should not try to memorize Opening 26 move-for-move. The tree is too deep to improvise. Instead, study it to understand the kinds of shapes strong players aim for in the opening: balanced central control, multiple threats, and lines that remain flexible.

Opening 32 and 44

Opening 32 is more aggressive. Black plays slightly farther from the center, accepting a less flexible position in exchange for sharper attacking chances. Opening 44 is considered more solid and positional; it tends to produce slower, maneuvering games. Both are common in high-level freestyle tournaments.

The Swap Rule

Because Black has a theoretical advantage, most serious Gomoku tournaments use a swap rule to balance the game. The most common form is Swap2:

  1. Player A places three stones on the board: two Black and one White.
  2. Player B then chooses one of three options:
    • Play as Black.
    • Play as White and add one more White stone.
    • Add one Black and one White stone, then let Player A choose sides.

The swap rule forces Player A to offer a balanced starting position, because Player B can always take the side that looks stronger. Swap2 is the standard protocol at world championship events.

Beginner Opening Guidelines

If you are not ready to study named openings, follow these rules instead:

  • Play within two intersections of the center for your first move.
  • Stay close to your opponent's stones. Letting your opponent build unchallenged in the center wastes tempo.
  • Avoid corners in the first five moves. Corners have too few directions of attack.
  • Keep your own stones connected. Disconnected stones are hard to turn into real threats.

How to Study Openings

Once you can consistently beat the Medium AI on GomokuHub, you are ready to study openings seriously:

  • Analyze your games. Use a strong engine to find where your first mistake happened. Most losses in intermediate play occur in the first 10–12 moves.
  • Pick one opening to learn deeply. Opening 26 is the standard choice for aggressive players; Opening 44 suits more positional players.
  • Drill common responses. Replay professional or engine games from your chosen opening until the patterns feel familiar.

From Opening to Middlegame

The opening phase usually ends around move 8–12, once the basic shape of the position is set. At that point, the principles from our strategy guide take over: build open threes, watch for double threats, defend in priority order, and fight for the center.

Final Thoughts

You do not need to memorize Opening 26 to enjoy Gomoku. But if you want to stop losing early and start dictating the pace of the game, the opening is the highest-leverage area to study. A few weeks of focused opening work can move you from "losing to the Hard AI" to "winning most of your games."