114NS Notcher

114NS  

Overall, this shape is very similar to the unsettled 113NS Notcher.

Black lives  

Black can live using the same play as in the 113NS Notcher. Note that a is no longer a ko threat.

unkx80: Black should live with b. One point better.
Robert Pauli: Leaves ko threat at a. Worth it?

Also lives, but White gets ko threats  

Black has other moves that live, but they are in general weaker, giving White more ko threats.

White kills  

The only way for White to kill is this sequence.