J+1 group
| Table of contents | Table of diagrams The J+1 group. Hane. Placement. Another placement. Endgame play. Sente. Seki. The J+1 group with descent. Tesuji. White is dead. |
J+1 group
The usual endgame play by Black is the placement at
. After
,
makes a descent, and
is the only way to gurantee unconditional life. Now
makes a throw-in, allowing
to capture a stone.
If
connects, then
and
makes seki. White is definitely worse off in this diagram.
J+1 group with descent
When Black descends at
, it changes things. To say the conclusion first,
is sente, so White needs a move at a. (Anonymous: The other descent is not sente.)
The throw-in at
followed by the placement at
is tesuji. The White corner becomes a bent four in the corner dead shape.
![[Diagram]](../../diagrams/8/d2f17e87fa1324b9d1988911fd876a30.png)
![[Diagram]](../../diagrams/42/c4569885fcb1d0c403974dc77ad0f396.png)
![[Diagram]](../../diagrams/33/8f119f5f0aa08b0c5e893bca712a0989.png)
![[Diagram]](../../diagrams/16/39546ffa578723829164c6433ae19099.png)
![[Diagram]](../../diagrams/8/c91317577d9f0419f3003689660f64b8.png)
![[Diagram]](../../diagrams/27/666b06f441b3d91e697bd7fb76cdd615.png)
decides to ![[Diagram]](../../diagrams/31/ff74e93839d883e84a6d264f1492eb1a.png)
![[Diagram]](../../diagrams/24/d9b885a196f3771df64c88174882e633.png)
![[Diagram]](../../diagrams/7/236d2b09750ed6d7cc9503e8a1b9da95.png)
![[Diagram]](../../diagrams/10/19a8432d9219cfd150087d88f0dbfa99.png)
2024 the Authors,
published under the ![Sensei's Library [Welcome to Sensei's Library!]](../../images/stone-hello.png)