High invasion of mixed three space extension
Path: ThreeSpaceExtensionInvasions
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Keywords: MiddleGame, Joseki
![[Diagram]](../../diagrams/43/9397d0cae6cbd9e2d21f556fce510da2.png) | Invasion |
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 with b. alone is usually not a good play: usually is used in conjunction with a white stone at c.
![[Diagram]](../../diagrams/34/5cb9330d79e50cf2401f0d80670eec54.png) | Invasion |
Trying to cut with is unreasonable. In this diagram, White has achieved nothing. If is played at , Black will cut at .
![[Diagram]](../../diagrams/50/2d657754f19dcb529b64a152b351cfef.png) | 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 .
![[Diagram]](../../diagrams/7/2206a6f98c5bc9aab603a997cecc9841.png) | Invasion |
Normally the wedge at is too big a sacrifice because it gives Black a ponnuki, but in some specific situations separating may be worth the sacrifice. In some other situations may be played at a, but Black b can seal the white group in.
![[Diagram]](../../diagrams/51/c2b8465bcba3b2b7b000a2c5eb6a420f.png) | Invasion |
With the stone can be a more severe invasion than . When tries to connect, and works in co-ordination with . Then is placed in an excellent position, at the vital cutting point.
![[Diagram]](../../diagrams/44/d446c30e40debf0d899b45b0bbb75d17.png) | Another idea |
Charles In examples from actual pro games, the previous diagram occurs; but other variations do, too. For example here before rescuing the cutting stone .
Also, Black may simply play tenuki after the invasion, treating the whole area lightly.
Path: ThreeSpaceExtensionInvasions
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"High invasion of mixed three space extension" at
Sensei's Library.
2004 the Authors, published under the OpenContent License V1.0.
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