What Is Go?
Go (囲碁, igo in Japanese, weiqi in Chinese, baduk in Korean) is a two-player abstract strategy board game that originated in ancient China more than 2,500 years ago. Despite its remarkably simple rules, Go produces a depth of play that has fascinated scholars, philosophers, and strategists for millennia — and continues to challenge even the most powerful artificial intelligence systems.
The goal is straightforward: surround more territory than your opponent. Yet within that simplicity lies an almost infinite universe of possibility.
The Board and Stones
Go is played on a grid board. Beginners typically start on a 9×9 board, then progress to a 13×13, and eventually the standard 19×19 board used in professional play. The lines on the board form intersections — and it is on these intersections, not in the squares, that stones are placed.
- Black stones are played by one player; White stones by the other.
- Black always moves first.
- Once placed, stones do not move — unless they are captured.
Core Rules Explained
1. Liberties
Every stone on the board has liberties — the empty intersections directly adjacent to it (up, down, left, right). A stone or connected group of stones is captured when all of its liberties are occupied by the opponent's stones. Captured stones are removed from the board.
2. Capture
You capture enemy stones by surrounding them completely — filling every last liberty. Captured stones count as points at the end of the game. This mechanic creates constant tension between attacking and defending.
3. The Ko Rule
The Ko rule prevents the game from looping forever. If capturing a stone would recreate the exact board position from the previous move, that capture is temporarily forbidden. The opponent must play elsewhere first.
4. Passing and Ending the Game
A player may pass their turn at any time. When both players pass consecutively, the game ends. Players then count their territory (empty intersections surrounded by their stones) and add captured stones. The player with the higher total wins.
Understanding Territory
Territory is the heart of Go. Empty intersections that are completely enclosed by one colour of stone count as that player's territory. Building large, secure territories while invading or reducing the opponent's is the central strategic challenge of the game.
Tips for Your First Games
- Start on a 9×9 board — it's much faster and teaches the same core concepts.
- Think about connections — connected stones are stronger and harder to capture.
- Don't chase every fight — sometimes building territory elsewhere is more valuable.
- Play with a friend or an app — hands-on play is the fastest way to learn.
- Review your games — even brief self-reflection after each game accelerates improvement.
Where to Play Go Online
Several free platforms let you play Go against other beginners or AI opponents:
- OGS (Online Go Server) — beginner-friendly, free, browser-based.
- KGS Go Server — a longstanding classic with a large community.
- Fox Go — popular in East Asia with a large player pool.
The most important thing is to start playing. Every game, win or lose, teaches you something new about this endlessly fascinating game.