Lesson 148: Patterns with Double-Approach 4
I'm sure that you remember the saying, ``After learning a joseki, forget it.'' It shows how difficult and ultimately meaningless it is to memorize all the joseki variations. The purpose of studying josekis has always been to learn the flow of proper reading and thinking. Since new variations arise all the time, it is literally impossible and also pointless to memorize all the newcomers. The variations introduced in a joseki book are not maxims, but possible suggestions that players should refer to. I will show you several variations in this lesson, but you should just study them, and then forget them.
The sequence from White 1 to Black 4 is what we've studied in the previous lesson. I showed White's answer to Black 4 with A, and Black B, White's empty triangle at C, and Black's attack with D. White's bend at 5 intends to avoid this complicated fight.
There is nothing difficult in the sequence up to Black 3. White got the influence on the lower side while Black got the corner territory. Later, White can clear up the left side with the sequence from A to E.
If Black doesn't want White to make the situation simple by bending at A as we've seen in the last two diagrams, he can block with 1 before saving the stone in atari. If White comes out with B replying to Black 1, then the position will be the same as the one we've studied in the previous lesson, and Black can continue the attack on the left side.
White's capturing with 1 means that he doesn't want to be led by Black's initiative. Black's siege with 2 is natural since White ignored his attack. White 3 and 5 are to make a base for living on the side. Now, Black has two choices at A and B.
Black 1 and 3 mean that he will let White live on the side. Up to 12, Black gained a pretty big influence toward the center. However, White's territory and influence are not so poor compared to Black's, since there is a weakness in Black's influence at A.
When there is an ally in the lower right corner, such as the △-marked black stone, Black can come down with 1, threatening White's base. It is impossible now for White to live inside, so he has to escape to the outside by attaching at 2. The sequence from Black 3 to 19 is inevitable and both the Black group on the lower side and the White group in the lower left corner are saved respectively with Black 18 and White 19. Although Black's influence in the center seems huge and the way of White's living on the side seems humble, the overall outcome is quite satisfactory for both players; it is White's turn now so he can reduce Black's influence with his next move.
The writer is a baduk professor at Myongji University and a professional player of the game.