The Rules of Go: A Complete Beginner's Guide

Read time: ~7 min · Updated: July 2026 · Part of: Learn Go

Go has a strange reputation: "the hardest game in the world." Yet the whole ruleset is one of the shortest in all of board gaming. This article lays out the complete rules in plain English — liberties, placing stones, capture, the no-suicide rule, the ko rule, and how a game is decided — with one summary table you can come back to any time.

【Terms used in this article】

1. The board and the stones 🎯

Go is played on a grid of lines. Stones go on the intersections, not in the squares (this is the first difference from chess or checkers).

• A standard board is 19×19 (361 points), but Go is still Go on 13×13 or 9×9, and brainGO distills it to 4×4 (16 points).
• One player uses black stones, the other white. Black always plays first.
• Every stone is identical — there are no "types" of pieces and no special movement to learn.

🧩 The whole game is about position. Because every stone is the same, the only thing that matters is where a stone sits and what's next to it.

2. Rule 1 — Place a stone, count its "liberties" 🫁

On your turn, you place one of your stones on any empty intersection. That stone now has liberties: the empty points directly touching it, up/down/left/right.

• Diagonals do not count as liberties.
• A lone center stone has 4 liberties; a corner stone has only 2.
• Same-color stones that touch orthogonally form a group, and the group's liberties are all the empty points touching any of its stones.

🫁 Life analogy: a liberty is a stone's breath. A lone stone in the middle of the board can breathe on four sides. A stone in the corner can only breathe on two. Want the deep version? → What is a "liberty" in Go?

3. Rule 2 — Capture: fill the last breath 🎯

This is the only rule that actually removes stones from the board.

When you place a stone that fills the last liberty of an enemy group, that group is captured — removed immediately. You can capture several groups at once if your single move fills the last liberty of each.

🐬 Life analogy: capture is like a slow surround in water. You don't hit the swimmer — you quietly cut off every direction they can breathe. The moment their last breath is gone, they're out.

A group with exactly one liberty left is in atari — the alarm state. On the next move, the opponent can fill that last liberty and capture it. Hearing "atari" should feel like hearing a fire bell.

4. The no-suicide rule 🚫

You cannot play a move that leaves your own stone (or group) with zero liberties — unless that same move also captures an enemy group.

• Pure suicide (your stone dies, nothing captured): illegal, you can't play it.
• "Suicide that captures": your stone looks breathless, but it also fills the enemy's last liberty — the enemy is removed first, and now your stone has liberties and lives. This is legal.

🛡️ Memory hook: capture always beats suicide. If your move captures anything, it's legal — even if your stone looked like it was suffocating. The enemy stones come off first, which may give your stone air.

5. The ko rule 🔔

Without this rule, two moves could loop forever. The ko rule forbids immediately recreating the exact board position from one move ago.

Here's the classic setup:

• You capture a single White stone.
• White can immediately recapture your stone in the same spot — restoring the board to exactly how it looked before your move.
• If that were allowed, you two could capture back and forth forever.

So Go adds one line: you may not make a move that exactly repeats the board position from your previous turn. White must play somewhere else first; only later can they come back to that spot.

🔔 Life analogy: the ko rule is like a "no-takebacks" rule in a card game. You just made a move; the opponent can't instantly undo it and put everything back. They have to do something else first.

On brainGO's 4×4 board, the ko rule matters in one specific shape (a single-stone recapture loop). The solver enforces it automatically, so you don't have to remember it — you just won't be allowed to retake illegally.

6. How a game is decided (and why brainGO skips this) 🏁

In full 19×19 Go, the game ends when both players pass. The winner is decided by territory + captured stones: whoever surrounds more empty points (plus captures) wins. There's a small "komi" bonus to White for moving second.

brainGO skips all of this — deliberately. Scoring, territory counting, and endgame math are exactly the parts that bury beginners. Instead, brainGO focuses on the part that transfers to every later stage of Go: pure capture puzzles on a 4×4 board. The goal isn't "who wins the game" — it's "can you find the move that captures within a few moves, and is your reading correct?"

7. One-table summary of the rules 📋

If you remember only one thing from this article, make it this table.

8. A worked capture, in four moves 🧩

Picture a White stone in the corner with two empty neighbors. It starts with 2 liberties.

1. Black plays next to it → White drops to 1 liberty → White is in atari.
2. White extends (adds a stone that touches the original), giving the group new air → back to a safe liberty count.
3. Or White ignores the alarm and plays elsewhere → Black fills the last liberty → White is captured, removed from the board.

The entire arithmetic of beginner Go is in those moves: liberties minus filling moves. No numbers beyond counting visible breaths.

🎯 The reflex that transfers everywhere: before you play, glance at the target group's liberties. That single habit — counting breath — is the foundation of every later skill in Go.

9. brainGO's 4×4: capture puzzles, proven correct 🎯

Here's the honest scope of what brainGO does with these rules:

• 4×4 board, 16 points. Stones touch on move one — no opening theory needed.
• Pure capture puzzles. The goal is always: find the move that captures at least one enemy stone within N moves.
• An exact solver proves every answer. Because the board is tiny, the solver can search every possible continuation — the "winning move" you're shown is provably correct, not a human guess.
• The ko and no-suicide rules are enforced automatically. You don't have to memorize them — the engine simply won't let you make an illegal move.

This is why brainGO focuses on capture alone and skips territory, scoring, openings, and endgame: those are the parts of Go that bury beginners. Capture is the skill that transfers; everything else is layers on top.

🧠 What about brain benefits? Go is a calm visual-logic exercise with zero number anxiety. Many apps claim brain games "prevent dementia" — the evidence there is still inconclusive. What we can say plainly: Go keeps your mind active, and a daily puzzle is a good habit. That's the honest claim.

Go rules FAQ

How many players does Go have?

Two — one player takes Black, the other White, and they alternate moves, Black first. On a full-size 19×19 board that means up to 300+ moves per game, but the rules themselves fit in the table above.

What is the first rule of Go?

Place a stone on an empty intersection, then remove any enemy group left with zero liberties. That single action covers most of the game: everything else (ko, no-suicide) only constrains where and when you may place.

What moves are illegal in Go?

Two: suicide — placing a stone that leaves your own group with zero liberties without capturing anything; and ko — immediately recapturing in a way that repeats the previous board position. Both are enforced automatically when you play capture puzzles on brainGO.

Is Go harder to learn than chess?

To start, no — Go has one core rule (surround to capture) while chess has six piece types with individual movements. Mastery is another matter: a 19×19 board makes Go's long-range strategy deeper. See Go vs Chess for the full comparison.

Start playing

The rules above are everything you need. The fastest way to feel them is to capture your first stone in 30 seconds — the companion handles the rest.

👉 Play brainGO — your first capture puzzle

Related guides

• Learn Go: the visual beginner's guide — the same rules, with pictures
• What is a "liberty" in Go? — the one concept behind every capture
• Capture Go training — turn these rules into a reflex