Weekly Go problems: Week 107

Here are the weekly Go problems for week 107.

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

Easy Go problem

It’s important to be able to see which stones are important and which stones aren’t.


Download SGF File (Go Game Record)


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


Intermediate Go problem

When you find yourself in a tight position, you should look for forcing moves which can help you to get out of trouble.


Download SGF File (Go Game Record)


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


Hard Go problem

When playing to kill, start reading by trying to narrow a group’s eyespace. If that doesn’t work, look for the vital point.


Download SGF File (Go Game Record)


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 Younggil An

Younggil is an 8 dan professional Go player with the Korean Baduk Association. He qualified as a professional in 1997 and won an award for winning 18 consecutive professional matches the following year. After completing compulsory military service, Younggil left Korea in 2008, to teach and promote the game Go overseas. Younggil now lives in Sydney, Australia, and is one of the founders of Go Game Guru. On Friday evenings, Younggil is usually at the Sydney Go Club, where he gives weekly lessons and plays simultaneous games.

You can follow Go Game Guru on Facebook, Twitter, Google+ and Youtube.


  1. Hi, thanks for the problems 🙂

    For the hard problem, I think you can play A4 after B2 as well.

  2. The intermediate problem reminds me of a failed attack on the carpenter’s square. Useful shape to know.

  3. That’s a most impressive dango in the Easy problem.

  4. In the hard problem, what about c2,d2,a2,b3,b2,c1? I see only ko & seki after that. But I think c2,d2,a2,b3,e2 kills (b1/c1 are miai, d1/b2 as well).

    • Younggil An says:

      That’s a good question.
      After W c1, B b1, e2, e1, f2, g2, f1, d1, and white’s still died. However, your solution is simpler and clearer than this. Thanks for your better option. 🙂

  5. Hi Younggil

    Thanks for your problems.

    for the hard one, how about black B2 wC2 bB3 wA4,then black B1?

    I think white cannot live after these moves.

    • Younggil An says:

      Hi Steve,
      That’s a good question.
      After black B1, white E2, F2, A2, E1, D1 and it’s a ko. I don’t think black can kill white after white A2 in the variation.

  6. Continue. White E2 bF2 wF1 b G1 wE1.

    it is still a ko.

    I am wondering if black has a chance to kill white in the above moves.

  7. Wow, I can’t even understand the easy problem, I must really suck… 🙁

    Why is throwing in before p2 better than p2 directly? feels like it just gives white 1 capture for no good reason…

    • Younggil An says:

      I’m sorry that you can’t understand the meaning of the throw in.
      Actually, the problem needs to have more explanation.
      The throw in at Q4 is good when you attack the white group on the right hand side of the board. However, if that group is already alive, you don’t need to do.
      In general, throw in is better and useful because it helps you to attack your opponent’s stones with that.

    • As Younggil said bobiscool, the throw in prevents the white group from getting an eye. The other way of playing also does work, but it leaves white the option to make an eye. So in the correct answer white can be attacked on the right side. However the whole right side is not shown, so it’s only implied that the throw-in will help. The right side white could be stable in which case the throw-in wouldn’t really be effective. I think that for stronger players doing the throw-in is probably just second nature since it prevents an eye.

      Be patient and don’t feel bad. Go is a journey for all of us. And Go is much bigger than any of us. I believe that’s true even for pros even though they see so much more than we do.

  8. David Ormerod says:

    It gives white a point, but white also loses a point because she can’t make an eye anymore. That’s assuming that white connects her ataried stones eventually – however, white won’t connect immediately either way and will take sente for now.

    To expand on what Younggil and Vlad have said, the throw in is the normal move. If white’s group is already completely alive, then omitting the throw in can be good because it makes capturing white’s three stones slightly more profitable later and there’s no potential to threaten white in other ways anyway.

    However, that’s really the exception to the rule. My advice would be not to worry about such minor differences until you’re already a high dan player. Focus on applying the normal techniques and principles of the game effectively and consistently before you worry about icing the cake.

    • There are also implications for black’s eyeshape! The non-throw-in may help it.

      It is one of those moves which, with infinite time, one can agonise over. The implications for white’s eyeshape are more obvious, so in a real game where this kind of sequence appeared early, the throw-in is normally better. But if white is unattackable, it is worse. In Go there is always more to see! 🙂

  9. B | W
    b2 a4
    b3 c2
    b1 e2
    f2 e1
    c1 kills, doesn’t it?

  10. Hi, I am a (very) novice Go player and don’t quite understand the solution to the easy problem. At the end, if white plays at Q4, how can black stay alive? It seems like white is still very thick in that corner and can easily attack the remaining black stones.


    • Younggil An says:

      That’s a good question. You’re right that White’s still very thick, but Black can easily settle with an extension to the lower side at J3 or K3 (You can’t see the J and K line in the diagram though).
      I hope my answer helps you to understand the problem.