Complete Basic Rules & Core Concepts | Gomoku Strategy Guide 02

Master The Fundamentals Before Learning Tactics

All advanced attacking, defensive and tournament strategies in Guides 03–20 rely on perfect mastery of these basic rules and vocabulary. This chapter covers every core mechanic of freestyle Gomoku (the default mode on our site), defines critical line pattern terms, and clarifies common beginner misunderstandings about win states and valid stone placement.

1. Board & Stone Basics

Our platform uses a standard 15×15 grid with 225 total intersection points where stones are placed. Two players take turns; Black moves first, placing dark stones, White moves second with light stones. Each turn you place exactly one stone on any empty crossing point. Stones cannot be moved, removed, or overlapped once placed on the board.

2. Official Win Condition

Victory is awarded to the first player who connects exactly five of their own stones in an unbroken straight line. Valid lines run horizontally left-right, vertically up-down, and two diagonal directions. In casual freestyle mode, six or more connected stones also count as a win; this rule changes in competitive Renju tournaments as covered in Guide 07.

3. Core Pattern Terminology (Critical For Later Guides)

Closed line: A stone chain blocked by enemy pieces on one or both ends, no room to extend into four or five.
Open line: A chain with empty space on both ends, expandable into forcing threats.
Three: Three connected stones; split into open three and closed three subcategories.
Four: Four connected stones; open four creates an unblockable immediate winning threat.

            Common beginner mistake: Confusing closed three with open three. Closed lines carry almost no offensive value and should not be prioritized during expansion.
        

4. Draw Game Scenarios

A match ends in a draw when all 225 intersections are filled with stones, and neither player has formed a five-stone line. Draws are rare in casual freestyle play, far more common in Renju competitive matches where Black’s offensive power is restricted by forbidden move rules.

How This Chapter Connects To Future Learning

Every tactical guide after this one uses the line terminology defined above to explain attacks and defenses. If you cannot instantly distinguish an open four from a closed four, you will misjudge threat priority and lose games unnecessarily. Spend time practicing pattern recognition against Very Easy AI until you can name every line shape on the board at a glance before advancing to Guide 03’s opening theory.