Low invasion of mixed three space extension

    Keywords: MiddleGame, Joseki
[Diagram]

Invasion

This is the most common invasion point. a is the most common answer. b is aggressive and c allows W1 to escape temporarily but possibly prepares for a large scale attack.

[Diagram]

Joseki

W3 is usually best, but requires two ladders for white to work. W3 at B6 is not recommended. W3 at W5 is not as severe. It is common for Black to take the outside with B4. He can also play atari from below ...

[Diagram]

Joseki

B7 at WC. W8 involves a ladder.

[Diagram]

Another ladder

If the ladder after W4 does not work, then this is catastrophic for white. (If it works, black will not play this way, of course.)

[Diagram]

If both ladders work

If both ladders work, black sometimes plays the B1-B3 combination, if he wants to fight. Note that B3 is one of the few moves that break both ladders at once.


Dieter, dnerra


This is a copy of the living page "Low invasion of mixed three space extension" at Sensei's Library.
(OC) 2007 the Authors, published under the OpenContent License V1.0.
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