Weekly Go problems: Week 45

Here are the weekly Go problems for week 45.

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

Easy Go problem

You can afford to sacrifice some stones and still capture the whole group, if you know how.

ggg easy 45 picture

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

 

Intermediate Go problem

What’s the best way to make use of white’s single stone at A?

ggg intermediate 45 picture

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

 

Hard Go problem

It doesn’t necessarily matter how many stones you give up, the important thing is what kind of eyespace remains afterwards.

(Yes eyespace is a real word. German speakers, back me up here icon smile picture )

go problems 45 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. jangalf says:

    The last one is hard to me… And the solution of the intermediate is very simple and beautiful! Thanks David.

    • David Ormerod says:

      You’re welcome Jangalf. It’s good to remember the sequence black uses to capture white in the hard problem. It’s not that uncommon in real play ;) .

  2. Badduck says:

    Hi David,
    thanks these are some nice problems! I knew the theme of the last one with the big eyespace or “Augenraum” as we say in german :-)

    • David Ormerod says:

      Thanks Badduck :) . I’ll remember Augenraum. I like it how there’s no hesitation to make compound words in Deutsch. It makes the language interesting.

      • In the Netherlands we also have a lot of compound words, though a lot of young people tend to cut the words (it’s called the English decease by language teachers).

        Eyespace would be oogruimte in Dutch ^^ a common word in goclubs when talking about life and death.

        • David Ormerod says:

          Great, now I know how to say this incredibly important thing in many different languages ;) . Maybe if I make it to the European Go Congress one year it will be useful? Or do people tend to speak English at those?

          It’s interesting about the ‘English decease’. It seems that people in every country worry about the degradation of the language, but I sometimes wonder if it’s just change that’s always been occurring.

  3. David, thank you again for the effort that you put into these always fun problems.

    Does a side variation in the intermediate problem have a minor mistake (typo?), viz., B-D3, W-E2, B-D2, W-C2. The solution ends there, but Black has the nice follow up B-F2, W-D1, B-G2, W-G1, B-E3, W-F1.

    Instead, after the bad 1st move B-D3, White should play W-D2 and Black has nothing?

    • David Ormerod says:

      Nice catch Myron, you’re right :) . I woke up early this morning and thought about this same sequence in bed…

      Jing and I were rushing too much last night, trying to get two articles finished before sending the weekly newsletter. It was a pretty clumsy mistake on my part and I’ve corrected the files now, thanks.

  4. Nice problems. The theme for the intermediate problem has been used before right?

  5. Ken Weng says:

    Thanks David. The intermediate and hard problem were interesting!

    • David Ormerod says:

      Thanks Ken, good to hear from you. I hope all is going well out there in the state’s centre ;) .

  6. As commented in the previous tsumego’s post[in detail].. The text hinting and indicating which player to play are extremely annoying. They are very difficult to avoid.

    -Passerby.

  7. (Reminiscent of an armchair philosopher’s approach to philosophy, while cute, non-optional comments are very reminicent of armchair Go-playing. Sightseeing.

    :-) )

    • David Ormerod says:

      Sure, but people enjoy Go in different ways and with varying degrees of seriousness. There are some good problem books in our shop for people who want to study life and death more seriously :) .

      When I first started publishing these weekly problems, I didn’t like the idea of hints either, but a number of people, including several pros I talked to, convinced me that they’re helpful. So I changed my mind.

      You seem to leave these sort of comments on our site repeatedly. It’s impossible to please everyone, unfortunately, and nobody’s forcing you to read the hints, or the site for that matter.

  8. Very nice problems. By the way, beginners problem. I was just thinking you might want to put a black stone at T4 because white can easily win the capturing race if it was an actual game. Just think it might confuse some people or give them the wrong idea.

    • David Ormerod says:

      Hi Sol,

      As Myron says below, the stone at T4 isn’t needed. I guess you hallucinated like I do sometimes :) .

  9. Sol, in the beginner’s problem, Black is already alive, even after W-T4. If White then plays W-T5, then Black plays B-T3. Black has 2 eyes at T1 and S2.

  10. I’ve had to take a break from Go recently due to having to get another job, so my skill has slipped slightly, but I was happy to get both the beginner and intermediate problems on the first try!

    David, thanks so much for doing these. They keep me thinking about Go during my week, despite all the hardship.

    Cheers!

    • David Ormerod says:

      Good to hear from you Pearce. I got your email too. Hang in there mate, things will get better.

  11. Damián says:

    This time, the hard problem was to much for me. I saw the solution and is amazing.

    The intermediate problem has a pattern that often apeares in my games.

    Thanks a lot!

    • David Ormerod says:

      No worries Damián. The first time I saw a problem similar to this week’s hard one I didn’t solve it either ;) . I remembered the funny sequence of moves though. It’s a weird one.

  12. Hi,

    After a refreshing holiday, these problems were good fun. Let me provide of my solving techniques without giving away too much:

    Intermediate:
    I knew it was all about acquiring enough liberties while maintaining the pressure on White. That gives move 1 with high probability. Next, if you know the weakness of White’s shape on the right, move 3, which is the pivotal move, can be found.

    Hard:
    I put a white stone on the vital point first and then tried if Black could destroy the shape with 2 consecutive moves. There was no way, so move 1 was clear. Then you just have to follow David’s hint: keep the number of eyespaces limited to 1, no matter how large. It’s a one way street, so this time the hard problem was not quite as hard, thanks to the hint.

  13. Guillaume C. says:

    Thanks again for all these problems you gave us! They’re really entertaining and challenging!
    Just a small thing..
    The title of the intermediate problem is: “Intermediate Go problem

    What’s the best way to make use of white’s single stone at A?”
    Shouldn’t it be “black’s single stone at A”?

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