When is 3-3 alive?

[bugcat]

You might also be interested in my recent thread about the 3-3 invasion beneath the “cloud shimari” or 5-4 + 5-3 enclosure.

Question about a 5-4 shimari joseki

What do you think of White’s invasion at 3-3 (R17) in Play Go at online-go.com! | OGS? This is something common enough that I’ve played both Black and White in the position in over-the-board tournaments, and I still see it fairly regularly in online games today. Should the 3-3 invasion be added? (I think so) Is it Ideal, Good, or a Mistake? (I think it is “Good”) What line(s) should be associated to it? (the kosumi attachment at R16 is most common in Waltheri) [image] Or, instead, …