Invasion of third line three space extension
Path: ThreeSpaceExtensionInvasions
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Keywords: MiddleGame, Joseki
![[Diagram]](../../diagrams/49/504bf32af4bf9b114ac2159915200815.png) | White invasion |
Icepick: The most common response I see (as a DDK) is a.
![[Diagram]](../../diagrams/33/e39feaf9f76fcd8bf89a8403ef9417c0.png) | Response |
can be on either side, depending on the rest of the context. At this point, Black can either draw back at a, or cut at b.
![[Diagram]](../../diagrams/14/dd6d735a1a5ee8efafd3e88363b501ec.png) | Drawing back |
Peaceful, but Black is separated
HolIgor: This variation is considered bad for Black as one of the black stones remains in a silly position.
![[Diagram]](../../diagrams/4/2ca97fb0bb3623ab52f65195260858b1.png) | Cut or Draw Back? |
White can now cut back at a or draw out at b.
![[Diagram]](../../diagrams/30/a0e450158129d94793440e52bdf9648c.png) | Cutting continued |
Black sacrifices to get outside influence, while White gets some territory.
Velobici: This line of play appears to be horrible for Black. Black started with a two stone to one stone advantage. Black has sacrificed four stones. White is out to the left with a nice position. The White cut at a remains a danger for Black.
HolIgor: Acceptable. Usually and are not played. They are ko-threats. White's aji is not good. The roots of the problem are in the previous moves. How did it happen that Black had a hole in the middle? Why did Black choose to play on the second line instead of jumping out and starting a running fight? Everything depends on the environment. There are situations where this line of play is OK for Black. Black gets compensation in the form of outside influence.
![[Diagram]](../../diagrams/19/51ad9d77b9a9ff94c3fe89f86f6fc91d.png) | Drawing out |
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