Lesson details
- Level
- beginner/intermediate
- Updated
- 2026-09-30
- Concepts
- territory · base · efficiency
- Tags
- joseki · star-point · basic · territory
Lesson 1 · Star Point Kosumi-Tsuke
Star Point Kosumi-Tsuke
Explore the starting position, play each move on the board, and compare alternative branches.
Use the board, move controls or keyboard arrows to follow the lesson at your own pace.
Learning goals
- Identify the approach
- Play the main line
- Compare corner guards
Identify the approach
After White approaches at F3, where does Black attach?
This variation is coming soon.
Setup: 2 stones · Black to play
Play the variation
Click or tap an empty intersection to play the next move.
Use ← / → to step backward or forward. Each branch starts from its own position.
Stones and move list
Black (setup) D4, White (setup) F3