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 white+circle. W8 involves a ladder.

[Diagram]

Another ladder

If the ladder after W4 does not work, then this is catastrophic for white.

[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.

[Diagram]

Drop a stone

Depending on the circumstances, Black may sacrifice the stone black+circle in favour of sealing off the side and influence the centre


Authors: Dieter, dnerra


[Diagram]

Hane on the low side ?

Timm?/10k : Is this why the hane on the low side isn't recommended ?

[Diagram]

Black should cut with B4

Slarty: That's a beautiful result for white, separating cleanly. Cutting with B4 will usually be the only move. Then with the sequence below, considered in isolation White achieves less compared to the recommended moves - harder to live below, and W3 may be aji keshi on the outside

Timm?: Thanks for clarifying.


This is a copy of the living page "Low invasion of mixed three space extension" at Sensei's Library.
(OC) 2014 the Authors, published under the OpenContent License V1.0.
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