# 4-4 point 3-3 invasion, W reverse playing order

Keywords: Shape

 Table of contentsW plays the reverse order Different order Table of diagramsChanging the order W makes a new order Continuation Erasure More accurate? Joseki Not Joseki corner

### W plays the reverse order

Changing the order

Paul Clarke, 2dan: If White tries to reverse the order in the 3-3invasion, Black may be able to answer with in the diagram "Changing the order". This lets Black shut White into the corner (particularly as 'a' is Black's sente). White ends up with a smaller corner than in the joseki, and Black may be in a position to make territory on the left. The disadavantage for Black is the aji of the cut at 'b'.

aLegendWai (9k? KGS): Maybe I get something wrong. How about if W exploits the cut on the upper left weakness earlier (like the following diagram shown)?

W makes a new order

Paul Clarke: White isn't alive in the corner yet, so cutting with is dubious:

Continuation

White is dead unless the two Black stones at the top get captured, which looks unlikely.If White uses to live in the corner, Black will play at 2 and capture the cutting stone.

aLegendWai (9k? KGS): Correct me if wrong.
Why not play at ""? The weakness at "c" is less dangerous than "b".
Weakness "b" can be exploited with a presence of ladder breaker (no matter how far they are).
Weakness "c" do not affect by ladder breaker. A play at "c" can be captured by a net. The only exception is when there's a stone which is very near to the weakness that it even breaks the net.

Paul Clarke: Playing at the circled point instead of is certainly possible. My reason for selecting was that the top is probably more important, otherwise Black would initially have blocked the other way. I don't see the net, but even if a White stone at 'c' can be captured, White can use the threat of a play at 'c' to help erase Black's area, e.g.:

Erasure

However, after the erasure, because of the descent at , Black can turn the White corner into a ko. Please see L+2 group with descent.

### Different order

More accurate?

Bill: I think that may be more accurate than an immediate . If , looks good for Black.

Joseki

After , can transpose to joseki, whether Black responds at or B a.

Not Joseki

And then there is this variation, the SanSan shadow. Black is thick and White is a low, but not contained.

The SanSan Shadow is a technique that takes advantage of the idea that the Reverse SanSan is a territorial invasion that can be contained. It plays an aggressive attack rather than defending, thus making it most flexible from the position in this diagram.

corner

4-4 point 3-3 invasion, W reverse playing order last edited by marshallearn on May 17, 2017 - 01:20