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LGroup
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L+1 group
Path: LifeAndDeath   · Prev: LGroup   · Next: L2Group
    Keywords: Life & Death

An L+1 group is an L group with a leg. The leg can be at the short side or the long side of the L shape. In both cases the group lives or dies according to sente.


First L+1 Group

[Diagram]
Diag.: First L+1 group

The first L+1 group lives or dies according to sente.


[Diagram]
Diag.: Black lives

Black can live by playing on the 1-2 point as shown.


[Diagram]
Diag.: White kills

White can kill by playing hane at 1. This reduces the shape to the standard L group, which we already know is dead.



Second L+1 Group

[Diagram]
Diag.: Second L+1 group

If the leg is on the other side, again the position depends on sente.


[Diagram]
Diag.: Black lives

Now the 2-2 point is the vital point for Black.


[Diagram]
Diag.: White kills

Again, reducing Black to a basic L group by a hane, kills the corner.



Second L+1 Group, weak leg

[Diagram]
Diag.: Second L+1 group

The second L+1 group with a weak leg is also unsettled. White can kill at a or Black can live by playing at a.



Path: LifeAndDeath   · Prev: LGroup   · Next: L2Group
This is a copy of the living page "L+1 group" at Sensei's Library.
(OC) 2003 the Authors, published under the OpenContent License V1.0.