4-4 point low approach one-space low pincer, attach and crosscut
This page will discuss black's responses to . To see how this position emerged, please visit 4-4 point low approach one-space low pincer#1.
Here are some options black might consider, please add any analysis you find relevant below
antic: This variation seems the most plausible for me. After , black will either atari at a or descend at b, depending on how white plays.
If white , then black must descend at .
antic: The question I have is then, does black have to play a, or can he descend at b in sente?
JoelR: If Black b, then White a threatens to capture . Besides, after Black b, White tenuki, White can play for ko. If White will play this , then Black probably would rather have taken Option C.
If white , then black must capture with .
antic: Does anyone think a is better here, instead of ?
JoelR: I agree, is more solid.
The most common joseki is to play this sequence. Black first forces with two atari's and then plays . This threatens to capture at , so white defends by playing . White can play a first, but when black responds at b, white must play after all. White can play this to create a cutting point though. threatens to capture again, so white must play , after which black plays to defend the cutting point.
Since white's corner is more enclosed than it would be if white had origininaly invaded at 3-3, this isn't played much.
Bill: Most common? Joseki? Sez who? Evidence, please.
antic: Yeah, I find these assertions dubious, at best.
eisit: Yes this is not joseki, it's good for black. But the white hane in the beginning was a trick move, so it is normal for black to get a good result if he plays correctly.
It is very hard for whit to find a good response after . There is a good sequence here, but it requires white to find two tesuji. Each of the moves a, b and c looks promising, but the result is sub-optimal. We will discuss these moves before showing the right response.
tderz: I don't know what the right response is , and would also consider White 'd'.
If white also extends to the left, black has the belly attachment tesuji of . After , white's marked stone is captured and is cut of. This result is bad for white.
is sente, because it threatens to play at a. is insufficient to protect both this weakness and the stone. After , white's stones are captured and white is left with a bad result.
After , black has taken the corner and sente, white white is still without eyes. Black might consider attacking with a or playing along the top side to strengthen . This depends on the surroundings
is the tesuji that white is looking for. is the most obvious response, but with the additional belly attachment tesuji at , white is safe.
Tapir: This looks impressive, but what happens if black resist at a?
If black resists with , white plays . Now black can give atari at either of the points marked a, but neither will allow him to live or win the semeai.
Even when black creates an extra required approach move for white with and , white still wins the semeai. After , w24 will be at and black is one liberty short
Black can followup like this, cutting of the stone while yielding the corner to white. a is an important move for either side, and might be played immediately.
But what about this simple sequence? White can't play atari from any side and black wins the capturing race. -Yuna
Why does white need to descend at 4? White playing 4 at either 6 or 7, I think, forces black and allows white to play at 5 and escape. -Anonymous
This shows if White tries to kill the corner. White escaping isn't a good result if it abandons .
White can play and escape with both groups, Black having some trouble finding the next shape. If Black first pushes at 3, White a, Black 2, then W jumps to 4.
If White is not willing to assume a divided position, the crosscut is likely an overplay. (The option of atari at c in the first diagram in this section remains.) -Slarty