Go rules and scoring guide

Black, white, and a world of choices. Play on 9, 13 or 19 lines.

Rules for this game

Black moves first; White gets 7.5 komi. Capture opposing groups with no liberties. Suicide and repeated board positions (positional superko) are forbidden. Two passes open dead-stone review. Score by area: live stones plus surrounded empty points.

This uses area scoring, not Japanese/Korean territory scoring. Captures are shown for reference and are not added to the final area score.

Review dead stones · score

Tap a dead group to mark it, and tap again to undo. If life and death are uncertain, resume play.

The preview below uses the dead stones you marked. Life and death are not judged automatically.

Each player confirms after agreeing on dead stones and score. Changing dead stones resets both confirmations.

Game mode

You play Black first. The computer is a beginner practice opponent. The beginner computer accepts a scoring review when you pass. Resume play if the board is unfinished.

Take turns as Black and White on this device.

Board size

9 × 9 · 13 × 13 · 19 × 19

Place stones on intersections using a click, touch, or arrow keys and Enter. Enlarge a 19-line board on small screens for precise placement.

Build from corners and edges. Watch for groups with only one liberty. A group with two eyes is safe.

Automatically saved on this device.

This game and undo history are saved in this browser. A new game replaces the previous save. Nothing is synced to other devices.