Weekly Go problems: Week 28

Here are the weekly Go problems for week 28.

Black plays first in all problems and all solutions are labeled ‘correct’. Have fun!

Easy Go problem

It looks like white’s two stones have enough liberties, until you find the tesuji.

ggg easy 28 picture

Download the solutions to the easy problem as an SGF or PDF file.

 

Intermediate Go problem

Maybe you’ve faced a situation like this in your own games? This sometimes happens as a followup to a common 4-4 opening pattern. How can you deal with white A?

ggg intermediate 28 picture

Download the solutions to the intermediate problem as an SGF or PDF file.

 

Hard Go problem

Based on the same pattern as the previous problem, this one may be harder than it looks. This shape can also occur in actual play and black’s group is surprisingly resilient.

go problems 28 picture

Download the solutions to the hard problem as an SGF or PDF file.

Still want more Go problems?

You can find Go books packed full of life and death problems, tesuji problems and other valuable Go knowledge at the Go Game Shop.

Discuss other possible moves

If you have any questions or want to discuss any of these problems, please leave a comment below at any time. You can use the coordinates on the problem images to discuss a move or sequence of moves.

You can also download the solutions as a PDF or SGF file by clicking the links below each problem.

About David Ormerod

David likes teaching, learning, playing and writing about the game Go. He's taught hundreds of people to play Go, including many children at schools in Australia. In 2010 David was the Australian representative at the 31st World Amateur Go Championships. He's a 5 dan amateur Go player and is the editor of Go Game Guru. You can find David on Google+ and follow Go Game Guru on Facebook, Google+ or Twitter.

Comments

  1. Nice practical shapes this time!

    Sadly I was so scared of the under the stones play that I missed the eye in the hard one… me and my wishful (for the opponent) reading >.>

  2. Brandon Matt says:

    Great job with the problems. The hard, for some odd reason, was the easiest one for me to figure out this time.

    I really enjoy these! Oh, the PDF files are a great addition also.

    • David Ormerod says:

      That’s funny, I suppose the third problem only has a few possible moves though. It’s more about reading a few variations to the end. Thanks for the feedback about the PDFs, I’ll keep making them. They don’t take long once you have the SGF file.

  3. anonymouse says:

    The problems were really trivial this week, solved all 3 in less than 20 seconds.

    • Sounds like liberal use of the words trivial and solved. Would you like a trophy?

      • David Ormerod says:

        Don’t worry about it Xiao. Perhaps anonymouse has just seen this tesuji before. Anyway, I can’t make everyone happy so it doesn’t worry me.

  4. I like the intermediate one the most. It is indeed a very common shape and it is helpful to learn how to deal with it.

  5. For those who find it trivial, there is an interesting var at W4

  6. jangalf says:

    good problems, thanks. I could find the three solution this time.

  7. Definitely wondering how the third shape can come up in actual play.

    • David Ormerod says:

      Well I’ve added some exchanges like the peep at Q9, which wouldn’t necessarily be played in order to make it more of a problem with a clear solution, but the basic position can come arise from a similar situation to the previous problem (based on the star point enclosure).

      If black’s more tightly enclosed (white’s already jumped at O5 and P8 in this example) and white makes the placement at S4, black S5 (as in the previous problem) doesn’t work, but black can probe at P2 first (P2, P3, Q3, O2) and then play S5. When white plays S3, black has to play R4 because of the nose tesuji at Q5. Then white plays atari at P2 and connects.

      That’s the basic shape, and as you can see, black’s exchanged P6 for O6 and then played elsewhere, letting white play O7. Let me know whether this makes sense.

  8. Peter VK says:

    The intermediate one is making me wonder when the attack at A is useful. I didn’t know this tesugi and I’ve played A in the past, but now have reservations. Thoughts?

    • The difference with the joseki variation is the presence of the black stone at the far left. Because of this, the hane hanging connection move is possible without leaving the cut. That leaves a nice catch, showing that a stone far away can make all the difference. Without that stone at the left the usual variation is bad for black, and the white placement is a real threat.

      Kind regards,
      Paul

      • David Ormerod says:

        That’s right, black’s counter isn’t usually this effective, though it still has its place. I’ll post another variation on this next time, so you can see the difference.

  9. The middle and the hard problems are nice. The greedy variation of the hard problem is quite nice psycologically, as you might think you are losing where you are winning.

    Kind regards,
    Paul

  10. In the hard problem, if capturing the three black stones allows w to win and fighting a ko is not an option for w, then the “greedy variation” may be a safer move for w.

  11. aboutthegame says:

    nice problems. I liked this week´s problems the most among all the problems.

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