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GiveMeLiberties

Referenced by
SqueezeTesuji
BentFourInTheCorner
CarpenterSSquare
KanazawaSolution16
BeginnerExercise1...

 

oshitsubushi
Path: GiveMeLiberties   · Prev: ConnectAndDie   · Next: ThrowIn
  Difficulty: Beginner   Keywords: Life & Death, Go term

This Japanese term describes a way of countering nakade.

[Diagram]
Diag.: Black lives

Black 1 here lives. Black will get two eyes by playing the 1-1 point, eventually, and there is nothing White can do to prevent that. Black 1 prevents White connecting the two marked stones (suicide rule).

Black 1 is an example of oshitsubushi, pressing the opponent's stones so closely together that connection is illegal.


[Diagram]
Diag.: Black dies

White to play can kill Black by connecting. Now White can kill Black by nakade at the 1-1 point, even if Black captures the three stones.



[Diagram]
Diag.: Black dies

If Black instead captures immediately, White plays at 2 and Black will die. White shouldn't regard this as a ko fight in the corner and try to recapture: Black then gets a second chance at oshitsubushi.


[Diagram]
Diag.: Black dies (continued)

Black 3 to capture is useless.


[Diagram]
Diag.: Black dies (continued)

White throws in and Black only has a false eye here.



[Diagram]
Diag.: Typical problem

White 3 here doesn't understand the position. Now Black can live.


[Diagram]
Diag.: Black 4 lives

Black lives with the sacrifice 4 and oshitsubushi at 6.

White should have recognised that this is a bent four in the corner position and played at 4 herself.


exswoo: Here's a fun fact. Oitsubushi literally means "chase and destroy" :)



Path: GiveMeLiberties   · Prev: ConnectAndDie   · Next: ThrowIn
This is a copy of the living page "oshitsubushi" at Sensei's Library.
(OC) 2003 the Authors, published under the OpenContent License V1.0.