Deutsche Bundesliga 16/17 round 8 and 3-3 revolution

Whoops, totally forgot to link the video:p

I’m not too proud of the game, but the 3-3 invasion once more turned out successful.

I once again collapsed when I tried to attack. Not only did my opponent live in sente, some of my stones also died in the process.

The highlight was undoubtedly the 3-3 invasion at 14:20. It’s the same invasion I tried in Grenoble.

c33a

3-3 invasion with positions on both sides to decide which way to pincer.

Just last week, Li Zhe 6p took it up a notch and invaded at move 7. According to him, the 3-3’s function is to rob White’s hoshi off its base.
This seems to be all the rage right now in the professional Go world, from what I heard from my limited sources. It’s very exciting that Go theory is undergoing such a drastic change. It might even develop in a way that we won’t see the hoshi anymore. I will definitely keep you up to date.

Recently world champion Ke Jie has also been experimenting a lot with the 3-3 invasion and appears to be winning all the time. Definitely check his games if you have access to recent games. (Gokifu is slow for some reason:/) I’m sure we will see it also in the upcoming match between Ke Jie and the fresh AlphaGo. Either that or nobody plays hoshi anymore.

Below is Li Zhe’s game:

c331

Earliest recorded 3-3 invasion in pro games.

It’s a brand-new idea that the hoshi can be debased on such an empty board. So far there is no refutation.

c332

Cont.: Supermega efficiency for Black.

In the game Black settled the corner in sente, “took away White’s base”, and split in the middle. It would be embarrassing for White to approach from below, so it was inevitable that Black got the two-space invasion.
In the end White finds himself in an awkward situation: Spend a move to defend the “wall”, with no points? Or let Black continue at A-B-C? In the latter case, White’s stick would indeed become a weak group.

My personal conclusion is that White has to find a different sequence to respond to the 3-3. It is such a revolution in Go theory that the most common variation turns out this bad for White…

Perhaps like this?

c333

Var.: Slight improvement, but not really…

White can keima and extend. White omits the A-B exchange which cannot be a bad thing. Whether it is enough to make the result satisfactory for White is a different question…

This weekend I played a tournament in Linz and I tried the invasion in one of my games:

c334

Black plays tenuki.

My opponent (Black) took sente to extend on the left side. This, according to my personal understanding, is mandatory, lest Black’s wall get pincered.

c335

Cont.: Even result.

I continued as shown in the diagramme which presents the expected sequence. (Black deviated from this, but the result was more or less the same.)
In the end both players spent the same amount of moves and get an even exchange of influence vs. territory.
But just when I thought we had found a way out for Black, it turned out that this sequence does not work for Black…

c336

Var.: It’s a fock.

Apparently White could have cut like this and Black is (probably) in deep trouble…
Either of Black’s outside two stones are on the verge of dieing, so this refutes Black’s tenuki.

In conclusion, I think what Black should do is get sente to extend on the left, but I have not yet found a satisfactory way for Black to do so.

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