4463 enclosure 2-5 approach

    Keywords: MiddleGame, Joseki
[Diagram]

Very low approach to 4463

One way to enter a framework built up around a 4463 enclosure is with W1 on the second line, sometimes called a submarine. This gives better chances of unconditional life than the 3-3 invasion, which normally becomes ko. On the other hand: there are some complex variations possible; White may need to apply sabaki techniques; and it is undeniable that White may end up with a low position.

White will often invade this way when black has a stone at or near black+circle. One key idea here is that the directions of a and b are miai.

[Diagram]

Black's answers

In pro games, four replies from Black are most commonly seen. In order of popularity, they are:

Naturally, since this is a middlegame joseki, any nearby stones may have a big effect on the choice of direction and subsequent fighting.


[Diagram]

variation c

When black plays B1, white's most common answer is at or near W2. The following moves depend on the surrounding positions. Sometimes white will play b immediately to make eye shape; more often white will wait until later to decide between a and b. Black will usually play at or near d to chase white into the centre, but sometimes black will press at c.


[Diagram]

variation d

Black will normally answer this way when there is no stone near a. White can live in the corner by playing b, but will usually crawl once at c first, as shown in the next diagram.

[Diagram]

most common sequence

Sometimes the exchange of B4 for W5 is omitted.


Authors:

July 2007: WME and some new material by xela, but it would be good to have this page reviewed by someone who actually understands it :-)


This is a copy of the living page "4463 enclosure 2-5 approach" at Sensei's Library.
(OC) 2009 the Authors, published under the OpenContent License V1.0.
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