Catenaccio joseki/follow-up plays

Sub-page of CatenaccioJoseki

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Comment: there are some interesting diagrams here

Assume these plays already made.

Avatar DJ Flux By the way, I do not know whether this has been mentioned elsewhere, but Black has a way to stop White from continuing to the right:

How to stop White  

FredK: This sequence is discussed in Sonoda (p. 210). He dislikes it because it leaves White both alive and not sealed in. He gives several pages of variations more like the one discussed by Dieter, below, which leave Black squashed into a second line position.

Charles Yes, this is an interesting topic. Ishida gives also Black at a, W6, Black cross-cut. But I'm not sure that occurs in real life. Black can also play directly at B7, sometimes.


There is also the possibility of Black playing the peep B1 here earlier, as soon as White slides into the corner.

That will mean that White has a chance to play at a here, so there must be a reason connected with the upper side for Black to play this way.

danoontje The variant is like this:


Later when whites corner is surrounded black has a trick.

Any good?  

B1 here looks like the modern style, but I don't know if it is good; it was once suggested to me by a 6 dan.


Perhaps there are occasions when this line is good, for example if invading at san-san would give White too much influence, but generally sub-dan players like this variation because it can lead to complicated fighting. Even so, it doesn't obtain much territory in itself, and that fighting often favours White. Things might go something like this:

Closing off the side  

The honte is for Black to play at W5, to correct the thin position; this line shows what happens without that play.

Dieter (moved from discarded joseki): Continuing on this particular "joseki", Guo Juan also recommends against it, because it has the following weakness:

Thin shape  

Please correct me, because I'm diagramming from memory and I haven't really checked its validity lately.

Tamsin I have tried this, but Black usually plays B6 like this:

Black's resistance  

If White saves W1, then Black can connect beneath W5 with a much better result than in the previous diagram. If White blocks, Black captures W1 and a tricky situation emerges:


Black's stones are not easy to attack because White's group is also weak. Have I missed something?

Charles It ought to be better to play W3 at a, anyway: stronger towards the corner.

Moved here from 4-4 point low approach, two-space high pincer with side stone.

Another popular joseki  

SnotNose: Not sure if pros play this nowadays (or ever) but it is often played by amateurs (at least up to 1 dan).

Annoying follow-up  

SnotNose: Black has this annoying little follow-up that has led to some ugly play in the games I've seen.

Other variations are possible (W4 at a, for example) but all lead to fighting and black+circle turns out to be very handy in the fight.

Alex Weldon: After this, White at b looks interesting to me, taking advantage of Black's shortage of liberties.

Charles Bad shape, aji keshi for Black.

SnotNose: That's exactly what I thought too when I first saw this sequence (ugly shape, aji keshi, etc.). However, Guo Juan 5P has recommended it to some attendees of the recent US Go Congress. So, for that reason alone it is hard to dismiss too easily.[2] Moreover, if black is a strong fighter, this can be an advantageous way to play. I think the relevant question is: is the fight a fair one? If it is at least fair or, due to board position or relative strength of players, tilts in Black's direction, then this may be an okay way to play, no?

Other thoughts: bad shape isn't always bad. The aji keshi is due to the fact that Black could have cut White off from progressing across the top. However, if the position is such that Black wouldn't benefit from limitting White at the top, then is it really aji keshi?

That completes my thoughts on this sequence. I won't defend it any further.

Charles I wouldn't dismiss it. It turns out that Cho Hun-hyeon tried this in 1996, against Seo Mu-sang (colours reversed).

Pro order of play  

The black+square stone was present. This went to the B5/W6 exchange.

White gave up white+circle.


Black then pulled out the cutting stones, but in very poor shape.

In fact Cho won this game, despite some serious dangosity.

Catenaccio joseki/follow-up plays last edited by Dieter on July 8, 2014 - 09:21
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