Shape-first corner lessons with sequence controls, normal branches, mistake maps, and verified board positions.
The first pattern in the beginner joseki series: star point, small-knight approach, kosumi-tsuke, extension, jump or small knight, then the standing-two three-space extension.
A classic star-point lesson: after White's small-knight approach, Black makes the small-knight enclosure, White enters lightly, Black points to protect the corner, and White takes a two-space base.
After the star point and small-knight approach, Black attaches and presses from above to lift the corner stone and build toward the left side.
After the star point and small-knight approach, Black can pincer instead of defending the corner. The beginner answer is to enter 3-3, take the corner, and jump out instead of crawling low forever.
When Black answers White's small-knight approach with a special corner guard, White should treat the approach stone lightly and move out with the large knight or extra-large knight.
A beginner star-point invasion lesson: White enters the corner, Black blocks one side, and both players learn when to keep crawling, when to choose the double hane, and when to save boundary moves for later.
A compact star-point 3-3 lesson: after White enters and stands up, Black can extend directly to the outside and White can small-knight into a stable local shape.
A practical star-point supplement: answer the attachment simply, recognize separate wide-approach examples, and treat 2-4 or 2-5 reductions as special-purpose choices.
After Black's komoku and White's high approach, Black attaches underneath, retreats to secure the corner, jumps out, and lets White settle with a standing-two three-space extension.
After Black's komoku and White's low approach, Black caps diagonally, White stands up, Black jumps out, and White settles with a standing-two three-space extension.
After Black's komoku and White's low approach, Black can answer with a small diagonal for balance or a small knight for speed, while White normally settles first on the side.
A practical komoku supplement: use the attach-press only when the side direction matters, let White settle efficiently, and avoid low special guards or flying caps that make Black heavy.
After Black's komoku, White's low approach, and Black's one-space low pincer, White should move out first; the simple jump-out plan avoids a cramped corner life and keeps the fight playable.
