Hovercraft
See also Joseki-related life-and-death example 2.
![[Diagram]](../../diagrams/17/a936b3e793ec5b5b71b930b8b563ecdc.png)
Hovercraft
This is another shape often resulting from a 3-3 invasion.
Let's try a few attacks for White.
Hane
![[Diagram]](../../diagrams/47/99048de4853f49735a8c9722cfff88fd.png)
First hane
Black has to let go two stones, or ...
![[Diagram]](../../diagrams/43/1034d68f539817fa35c025c3abef8520.png)
Problem
He will die after 2.
![[Diagram]](../../diagrams/28/1445d6f2b4109c8c6814313a1dd6fbb1.png)
Life
Black lives, but White can make an endgame gain at a.
![[Diagram]](../../diagrams/33/c6c5b658583fbed01a44319390722195.png)
L+2 Group
Making the L+2 group saves all 6 stones but this time, the other white descent (on top) is sente, as this will threaten a ko.
![[Diagram]](../../diagrams/19/ed01b960191ef6bd2f4be93884dfdb97.png)
"Hovercraft" with descent
If white has the marked stone, for example because black threatened to connect an outside group here, the corner can now be killed.