4-4 point low approach low extension, slide, 3-3
Return to parent joseki article: 4-4 Point Low Approach Low Extension, Slide
The 4-4 Point Low Approach Small Knight Extension Slide 3-3 Corner Defense is the most common response to the slide. The purpose of move is to defend the corner.
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Moves are listed by frequency in professional games , which is sensitive to whole-board position. Bolded moves are commonly considered joseki.
- a, 4-4 Point Low Approach, Low Extension, Slide, 3-3, Two-Space Low Extension - (joseki) (common) (beginner) (AI favorite)
- b, 4-4 Point Low Approach, Low Extension, Slide, 3-3, Small Knight Extension - (joseki) (common) (beginner) (situational)
- g, 4-4 Point Low Approach, Low Extension, Slide, 3-3, Two-Space Mixed Extension - (joseki) (AI favorite)
- c, 4-4 Point Low Approach, Low Extension, Slide, 3-3, Tenuki - (joseki) (advanced)
- d, 4-4 Point Low Approach, Low Extension, Slide, 3-3, One-Space Alternate Approach - (rare)
- e, 4-4 Point Low Approach, Low Extension, Slide, 3-3, One-Space Jump - (rare)
- f, 4-4 Point Low Approach, Low Extension, Slide, 3-3, One-Space Low Extension - (rare)
See main article: 4-4 Point Traditional Slide Joseki
The Two-Space Low Extension is traditionally the most common continuation (~62%)  and completes the traditional "slide joseki". The low extension forms a strong base for White, which is recommended in for beginners in most situations.
Two-space extensions on the third line are a common shape in go. They are the ideal length of an extension in order to create a base, which can be approximated as the spacing necessary to create one eye. The knight's move with the stone almost secures enough eyespace for a second eye, so White's group is very resilient and strong. It is also territorial and aims to secure ~7 points for territory for White.
Although it is Black's turn, both players will typically tenuki from this position and play elsewhere. White's follow-ups in this position include a and b, which seek to approach Black from the opposite side or jump to develop more influence.
White can also play like this, which is usually done when white has a low solid position in the upper right.
For example: If the position in the upper right is like this (the result of a common joseki), is better high, because of the low solid position of the stone. If were a two space extension, white would have four stones on the third line in a row, and would have a very low position.
invites Black to invade at a, after which white can use the power of effectively in an attack on the invading stone. If black does not invade, white may build her position with a move at b or c
If black invades, we can expect something like this sequence.
See main page: 4-4 point low approach low extension, slide, 3-3, tenuki
rokirovka: One opponent played against me instead of extending on the top. I had already played at the middle left star point, so I was strong on the left and probably should have just played tenuki here, but I followed the advice to play if White omits the extension along the top. What is the correct reply to ?
See Go Bloopers for a discussion of why after is questionable.
As you can see, the continuation went badly for me in this corner. After , I admitted defeat in this corner fight and decided to cut my losses, playing elsewhere. My marked stone and are horribly weak (the ladder after Black at a, White at b, was bad for me), and White has a strong position on the top and good influence toward the center.
So, be careful with the advice about attacking with a pincer at the marked stone if White omits the extension along the top. If White plays a different useful move such as his marked stone here instead of the extension, direct attack still may not work.
You have to attack with constructive purpose in mind, rather than for the sheer joy of making your opponent respond. and are counter to good go sense because they are attacking from your strength, rather than attacking from your weakness and pushing your opponent up against your strength. Each of these black plays don't help the already impervious black group on the left, but they all strengthen white, which weakens to the point where this stone is lost.
You might see this... in games its very old joseki not played very much.. i used a and b for 11 and 12
Strong AI programs sometimes prefer the two-space mixed extension instead of the two-space low extension. However, it is not seen very often in professional play.
- (Youtube) BenKyo? Tutoring (5d): Approach & Slide - Joseki Learning Path, Beginner to 1-Dan! (+ Pro Game Commentary!) (2021)