# Attach or knight move? The reason to choose classical joseki!

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This is a very good video and I agree with the conclusion that the AI joseki gives too much influence to the opponent, since I have been trying this a lot lately (along with a lot of 3-3 invasions) and I almost always end up with the opponent getting too much influence.

The only thing I would like to suggest is that there is something important missing about the issue with the extension at the star point. For example, Iâ€™ve rarely experimented with playing this:

Because I am afraid of White playing A (securing a large corner) and later B.
As you mentioned, without A the invasion at B is not something that cannot be handled, but if I am not mistaken that is true because the stone at 4 can be treated as â€ślightâ€ť. Without that explanation there is a question that arises naturally later in this diagram:

So, once youâ€™ve covered the problem with the Knightâ€™s move at 6, why canâ€™t you now extend at 8 and the joseki is at the square and the AI says â€śextend at the triangleâ€ť?

It seems counter-intuitive to propose that now that we have more stones we need to be more careful with out extension, and I think it is a natural question for a DDK and high SDK.
I do not pretend to certainly know the answer. I think that the answer is that now the invasion at A or the attachment at the triangle is more dangerous, because the exchange of moves 5-6 makes those stones â€śheavyâ€ť and not something we can easily discard anymore.

Again, I want to make clear that I am not sure if this is the answer, which is exactly why I noticed why it was missing from the video and I think that other viewers might be left wondering about it as well and maybe a quick answer can be added as a comment in YT.

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A really really good video for me - totally understandable and addressing the exact sort of questions Iâ€™ve faced with this whole business.

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Thank you for the question!

For the first example, after white played at point A and invaded at point B, Black still has some counterattack like the peep at E3, this peep could prevent white to play an attach on F2. But, I think it is important to remember that, white already spent one more move at the corner, so it is not a pity to give up some territories to white.

And for the second question, â€śwhy canâ€™t you now extend at 8â€ť, your explanation is also correct. My explanation would be, the exchange of 6 and 7 actually give up the 3-3 invasion, so it is not wise for black to surround two more points but leave some defects to the territories, this is overplayed.

I

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