Lesson 147: Patterns with Double-Approach 3
Double-approach joseki variations usually occur when your opponent pincers the first approach. We learned the variations with the one-point lower pincer in the two previous lessons. Now we're going to study the variations with the two-point higher pincer. Because there is more room for the pincered player to move in, there are more variations we have to consider.
When White approaches again with 2, attaching at 3 is one of several options for Black. Even White has a few options, including bending with 4. Since we cannot study all the options at once, let's focus only on the sequences following Black 5. Even then, White has two choices at A and B.
It is the simplest choice for White to come into the corner with 1. However, the outcome of the sequence up to Black 4 is not a desirable one because Black's squeezing with A, aiming at B with the help of the △-marked black stone, is a good follow-up move that restricts White's development on the left side in sente.
Therefore, White 1 here is more often played than the 3-3 invasion. When playing 2, Black may worry about White's coming out with A to cut. If so, see Diag.4. After White 3, Black has to play 4 before bending with 6 to avoid White's cutting with A.
If White pushes with 3 and cuts at 5 right away, Black 6 is a good calm move. Because of the weakness at A, White cannot follow up with an aggressive fight afterward.
To simply follow along White's push outward is too weak a strategy for Black. Up to 8, the △-marked black stone is isolated close to the opponent's strong wall, and the corner is not yet perfectly Black's territory.
Continued from Diag.3, after Black's bend, White plays atari with 1 to reinforce his stones on the left side. If Black saves the stone in atari, White will cut the two black stones in the corner with 2, which is a great loss for Black. So, it is natural for Black to connect at 2, forcing White to take care of his weakness with 3. After Black saves the stone with 4, the sequence up to 8 is the most often played. White's reply to Black 8 may vary in several ways, and A, B, and C are the commonest ones. The fights following each move are too diverse and complicated to be explained here. It is sure that each of them can occupy more than a quarter of the board.
If Black omits Black 6 in Diag.6 and attacks the ▲-marked stones with 1 as shown, White 2 and 4 are the simplest and best answers. While the marked black stone on the lower side is totally controlled by White, the four white stones are so flexible as to escape easily from difficulty.
Instead of White 5 in Diag.6, White can play a knight's move with 5. Still, Black has to block with 6 and continue a fight on the lower side. To build a wall first by attaching at A can be an option for Black's next move.
It is too passive for Black to block with 1 instead of Black 6 in Diag.3. Black's territory in the corner looks small compared to White's outstanding wall in the center.
The writer is a baduk professor at Myongji University and a professional player of the game.