BQM 346

    Keywords: Question

I had the following opening in a recent 2-stone handicap game. I've been playing 5-4 openings a lot lately, and I don't recall seeing White 4 before. I haven't been able to find it in any joseki sources, although I did find some middle games with it in gobase. I played the corner as in the second and third diagrams, sacrificing the 3 marked stones and giving White a ten-point corner in gote for (I believe) substantial influence on both sides. Did I have better? -- golearner (14+ kyu, IGS)


19x19 diagram  


19x19 diagram  


19x19 diagram  

MrTenuki (KGS 3k): Let's do a Tewari on your sequence in Diagram 1.

Lower right corner: game sequence  

This is the sequence from your game. Now, suppose that Black played B1 at B3, B3 at B5, and B5 at B1:

Lower right corner: re-ordered sequence  

In this case, Black opened at the 3-3 point first with B1. Then White's W2, attaching at the 3-4 point, is clearly not the right approach. The hane with B3 punishes White's mistake, and White tries to introduce complixities with W4. And B5 is theoretically an option as it is extending from a crosscut (which may be good "if there are no other stoness nearby").

Of course, one could argue that if this were the board position, it would be better to reinforce B1 rather than B3, as that would allow black to capture either W2 or W4. But as the game sequence suggests, this is certainly playable.

Bill: You show good instincts. :-) Here is a slight improvement at the end.


Bill: B1 is tesuji, protecting against both cuts. If W2 cuts, B3 - B5 captures in a net.

Bill: Compare the result after B1 with the result when Black starts on the 4-4 and then White plays on the 3-3. :-)

Skylancer (3k): I would agree with everyone else. Black is doing great after this sequence, perhaps a little moreso after Bill's suggestion. Black's wall is working well with the 4-4 in the two corners to create a large sphere of influence, which should be worth more than the points White got in the corner. Black is set to build up a framework, or to attack strongly, or both, depending on what White plays. Of course, the trick is figuring out how to make good use of that, which can be hard around the 14K level.

The result is very similar to what would happen with a White 3-3 invasion if Black had played 4-4 in that corner, except that White gained a few extra points in the corner with a big loss of being sealed in completely.

White has done nothing so far to make up the small handicap. I believe Black should be satisfied. =)

unkx80: The following sequence is food for thought. I am not saying that this sequence is necessarily any better or worse than the other suggested sequences.

19x19 diagram  

I think Black can consider B1 to W6, which is essentially a one way street. Right now, a feels small, so with sente B7 can play at the bottom star point to form a framework.

Bill: B7 could also be at b (or even c), to protect against the cut.

19x19 diagram  

The orthodox play for White would be to approach at W1 to prevent the double wing formation. Then after W3, Black can make an approach move at B4. This seems to be a pretty playable game for Black.

BQM 346 last edited by Dieter on July 5, 2008 - 12:49
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