brainGo

False Eyes in Go: Why Some Eyes Don't Count for Life

⏱ Read ~4 min · Updated July 2026 · Part of: Learn Go

A false eye is the cruelest trap in beginner Go: it looks exactly like a real eye, but it doesn't count. Build two "eyes" where one is false, and your group is still dead.

English中文Plain meaning
eye眼a surrounded empty point that counts for life
false eye假眼looks like an eye, doesn't count
two eyes兩眼the condition for being alive
alive / dead活棋／死棋can / can't be captured

1. Why two eyes matter

A group with two real eyes can never be captured — the opponent can't fill either eye without having no air themselves. That's the whole life rule. So the obvious goal: make two eyes.

🪤 The trap: some empty points look like eyes but aren't "real." If you count them as eyes, you think you're alive when you're dead.

2. What makes an eye "false"

An eye is false when the surrounding stones don't fully control it — usually because two of the stones "diagonal" to the eye can be cut, so the opponent can eventually fill the point.

👁️ Simple test: look at the diagonal points around the eye. If the opponent controls enough of them (typically 2+ in the corner, 3+ on the edge), the eye is false and won't save the group.

3. A classic beginner loss

You surround a group, see two empty points inside, and relax. But one is a false eye — the opponent plays inside, fills the real eye, and captures the whole group. You never saw it coming because the eye "looked fine."

😱 This is why tsumego training exists: to drill the difference between real and false eyes until you stop being fooled.

4. How to defend against false eyes

5. On a 4×4 board

Tiny boards make eye status easy to verify: with so few points, you can see exactly which diagonals are controlled. brainGO puzzles that touch life-and-death will reward you for spotting the false eye instantly.

Try it

Learn to see the difference by solving puzzles where a false eye is the whole trap.

👉 Play brainGO — don't be fooled

Related guides