4-4 point low approach, high extension, invasion
White has three standard answers to deal with the invasion: contain
immediately by attaching at a, or reinforce first by attaching at b or, as surfaced from the AI revolution by forcing at c.
Other options to investigate are d, attacking
, e dodging the invastion and f jumping out.
Attach and contain
The wedge variation usually results in White influence, while Black will settle at the , by continuing to push or jump at some point, depending on stones present to the right.
White can also atari from below, resulting in a variation which can result in ko at
and ladder at a.
Attach and take corner
This attachment turns into a variation of the 4-4 point, low approach. With the marked stones present, White may choose to take the corner at
instead of connecting at
.
Force
Aside from local responses, immediately seeking compensation in the corner is possible. However, Black may turn here and confine White into the corner, especially if Black has a stone at the circled spot. After
, White's marked stone is oddly placed.
In pro games
When analyzing this position, LZ prefers
here, taking the corner and some centre influence in sente to then play
.
![[Diagram]](../../diagrams/8/7bdf2ce59a5754e63e2abfa20d9740ec.png)
![[Diagram]](../../diagrams/26/1683162e27884ad5a7e3986d3459587e.png)
![[Diagram]](../../diagrams/9/f28e439fd28ece608cef875f2673b744.png)
![[Diagram]](../../diagrams/9/b0adc3cb22ee923f83d0e4a4cc201b1e.png)
![[Diagram]](../../diagrams/12/1ec96493020e2d52bf8e8823f43dbd25.png)
is an AI novelty. We get a ![[Diagram]](../../diagrams/2/29908a8fa7d59b45ee5c9366c721c628.png)
![[Diagram]](../../diagrams/24/204f6e052772e30bea3239d588c6466e.png)
![[Diagram]](../../diagrams/30/a9effd9a0fbae971ef5df97d700c2094.png)
![[Diagram]](../../diagrams/30/d1608003215bf73bf06eb28f355af6c2.png)
![[Diagram]](../../diagrams/49/50a202e6a02c776e220f8e4af23294de.png)
2024 the Authors,
published under the ![Sensei's Library [Welcome to Sensei's Library!]](../../images/stone-hello.png)