[Welcome to Sensei's Library!]

StartingPoints
ReferenceSection
About


Paths
ThreeSpaceExtensi...

 

High invasion of mixed three space extension
Path: ThreeSpaceExtensionInvasions   · Prev: LowInvasionOfFourthLineThreeSpaceExtension   · Next: LowInvasionOfMixedThreeSpaceExtension
    Keywords: MiddleGame, Joseki

[Diagram]
Invasion

W1 is not as common as the invasion at a (see low invasion of mixed three space extension), because Black's response at a will usually connect the two black stones together. Alternatively, Black may choose to attack W1 with b. W1 alone is usually not a good play: usually W1 is used in conjunction with a white stone at c.


[Diagram]
Invasion

Trying to cut with W3 is unreasonable. In this diagram, White has achieved nothing. If W7 is played at W8, Black will cut at B7.


[Diagram]
Invasion

Trying to live this way is too low for white, and tends to give away too much influence to Black. Later, Black a will capture W1.


[Diagram]
Invasion

Normally the wedge at W3 is too big a sacrifice because it gives Black a ponnuki, but in some specific situations separating BC may be worth the sacrifice. In some other situations W7 may be played at a, but Black b can seal the white group in.


[Diagram]
Invasion

With the WC stone W1 can be a more severe invasion than W2. When B2 tries to connect, W3 and W5 works in co-ordination with WC. Then W1 is placed in an excellent position, at the vital cutting point.


[Diagram]
Another idea

Charles In examples from actual pro games, the previous diagram occurs; but other variations do, too. For example W1 here before rescuing the cutting stone WS.

Also, Black may simply play tenuki after the invasion, treating the whole area lightly.



Path: ThreeSpaceExtensionInvasions   · Prev: LowInvasionOfFourthLineThreeSpaceExtension   · Next: LowInvasionOfMixedThreeSpaceExtension
This is a copy of the living page "High invasion of mixed three space extension" at Sensei's Library.
(OC) 2003 the Authors, published under the OpenContent License V1.0.