Published July 16, 2026 · Beginner Guide · 6 min read

Standard Gomoku Rules: The Complete Beginner's Guide

Gomoku five-in-a-row winning pattern diagram
The three winning line directions: horizontal, vertical and diagonal

The Board and Stones

Competitive Gomoku is played on a standard 15×15 grid board, marked with intersecting horizontal and vertical lines. Stones are placed on the intersections, not inside the squares — just like Go. The board traditionally features a wooden surface with dark grid lines, and a marked center point called the "star point" where the first move is usually played.

Two players compete: one plays with black stones, the other with white. A full set contains enough stones to fill every intersection on the board, though most games end long before the board is full.

Basic Gameplay

The rules of play are famously simple, which is why Gomoku is one of the most accessible strategy games in the world.

Core Rules:
  • Black always moves first
  • Players take turns placing one stone per turn on any empty intersection
  • Once placed, stones are never moved or removed from the board
  • The first player to form an unbroken line of five stones wins

That is the entire basic rule set. You can teach someone to play in under 30 seconds. Yet beneath this simplicity lies enormous strategic depth — masters spend decades refining their understanding of openings, threats, and defensive patterns.

Winning Conditions

A winning line of five can run in any of four directions: horizontally, vertically, or along either diagonal. The line must be exactly five consecutive stones of the same color with no gaps and no opponent stones breaking the sequence.

Importantly, six or more stones in a row (called an "overline") does not count as a win in standard competitive rules. This is a critical difference between casual Gomoku and tournament play, and one of the most common sources of confusion for new players.

Draws and Special Cases

A game ends in a draw if the entire board is filled with stones and neither player has achieved five in a row. In practice, draws are rare at high levels because players usually resign when the position is clearly lost.

In tournament Renju (the regulated competitive form of Gomoku), additional rules restrict Black's first few moves to balance the inherent first-player advantage. These opening rules vary by tournament format, but they all aim to ensure fair competition between equally skilled players.

Common Beginner Mistakes

New players typically make three predictable errors. First, they focus entirely on building their own lines while ignoring their opponent's threats. Second, they play stones too far apart, creating weak positions that are easy to defend. Third, they underestimate diagonal threats, which are harder to spot visually.

The fastest way to improve as a beginner is to train yourself to scan all four directions after every move — both your own threats and your opponent's. This one habit will immediately raise your game above most casual players.

Ready to learn openings? Continue to → 15 Classic Opening Formations Explained