Weekly Go problems: Week 100

Wow! Where did the last two years go?

100 weeks of Go problems.

Thank you all for dropping by each week and sharing your thoughts in the comments from time to time.

Have you tried all 300 problems? Let me know!

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

Easy Go problem

Sometimes the simplest moves are the hardest to see.

ggg easy 100 picture

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


Intermediate Go problem

There’s a lot going on here, but the heart of this problem is a capturing race.

Apologies to Yang Laoshi (Yilun Yang 7p), who inspired this problem.

ggg intermediate 100 picture

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


Hard Go problem

What’s an eye anyway?

There are so many possible move orders which will solve this problem. It’s hard to cover them all, so I usually avoid posting Go problems like this.

However, this week is special, so please forgive me if the move order you choose isn’t included in the SGF and check the solutions. You should be able to figure out whether your moves are essentially the same idea.

go problems 100 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.


  1. Thanks David for all the 300 problems, you have made a lot of effort for us. In these years, I tried to solved all the problems, although not always found the correct solution. Go game guru is wonderfull, and today’s problems too!

  2. Thank you David for 300 interesting to very ingenious problems. Every week you asked us to spend a few minutes to try and solve them, time well spent! I hope you will continue this effort.

    Kind regards,

    • David Ormerod says:

      We’ll keep going for as long as we can Paul. I hope you’ll keep enjoying our articles each week.

  3. I’ve been doing since Week 1. :)

    3rd problem is very nice!

  4. Thanks David for the great problems! :)

  5. These were very nice, if a bit easy.
    Very beautiful shape :)
    I started following you around week 50, then I played all the problems going backwards through the archives.

    • David Ormerod says:

      Yes these were probably a bit easier than usual, as long as you understand the concept in the third problem. Thanks pasko.

  6. It’s a nice lesson in the last problem. Good work David.

  7. I have solved all 297 up to this week (I haven’t solved these quite yet, but I will!) Some of the harder ones took me a few days to solve.

  8. Any chance of these (all) being available as one zipped file? I’ve just found out about them.

    Thanks for offering these!


    • David Ormerod says:

      A few people have been asking for that Jeff and I’ll do that soon. I want to do a quick review of all the problems and correct any minor errors before releasing them as a package (perfectionist? :) ).

  9. Anonymous says:

    The last problem is a variation on a classic, dragon eyes don’t turn up very often in games but when they do it’s a really nice feeling

    • David Ormerod says:

      Yes, In about 1o years of playing Go I’ve only seen an opportunity to live like this a few times in my own games, and only lived like this on the board once.

  10. Hi, I love go, but sometimes I can go months without playing and then I’ll go a couple months playing every single time I can. These problems kept me connected to go during the last 4 motnhs where I haven’t been playing much, so thank you for that.

    The articles on the go scene are always appreciated as well.

    • David Ormerod says:

      I’m glad to hear that. I think most players have times where they take an extended break from playing Go, but if we can help some people to maintain their enthusiasm for the game then I’m very happy :D .

  11. I have been doing this for quite a while. Thanks for posting these every week! 3rd problem remind me of a game I play many years ago where I chased a dragon all around the board, making dozens of fake eyes, until it connected with itself, making all the eyes real!

    • David Ormerod says:

      Haha, I think most people are surprised the first time they see a group live like that :) . I definitely was.

  12. Yay, great fun these problems, even thought a bit easy this time. I missed the first year, but intend to solve all those too. Thanks for keeping up the great work!

    • David Ormerod says:

      Thanks Johannes, I hope you enjoy the rest of the problems and if you have any questions, just leave a comment any time.

  13. The last one was so easy when I was able to solve the last 2 problems before it. :)

    This week’s problem was so fun to solve :)

  14. Thanks for the phenomenal amount of work you’ve given to all these problems. I’ve looked at all 300 (very occasionally managing to do them without seeing the answers). Haven’t looked at the variations yet. Think I’ll watch some commented games next. To give to the world freely like this is awesome:-)

    • David Ormerod says:

      Thanks. We still have a lot of work to do if we’re going to create the kind of site you see for other games (e.g. chess), but we’re taking another step each day. Enjoy the commentaries.

  15. Thank you for all th problems.
    This time, the hard problem was the easiest to solve, the easy one the hardest :-)

  16. I really enjoyed this week’s problems – thanks.

  17. I’ve tried them all, and want more!
    I take longer than I should on the easy ones, and feel “good” when I get the first move on the hard ones.
    I always save the problems for last, like desert after a good meal of featured games.

    • David Ormerod says:

      Thanks Chris, we’ll keep making more.

      I’ll post a file of the first 100 problems, like a few people have been asking for, and you try them all again in the meantime :)

  18. A triplet worthy of a 100th birthday. A fantastic set of problems and solvable through its very setup.

    Well, how can I not be proud to have been here from the beginning. Two years? Unbelievable.

    Where can we donate?

    • David Ormerod says:

      Thanks Dieter. When we started doing this, we wanted to fund what we were doing with this website (and later promoting Go in other ways) entirely through selling Go equipment, books, Baduk TV etc.

      Quite a few people have talked to me about donating recently though (maybe because they don’t need to buy anything else), so we’re rethinking whether we should allow people to tip articles or something like that, but we’re still talking about it. I’ll post an update if we change anything.

  19. Many thanks David, I’m still working my way through them Great videos too.

  20. Alejandro Suárez-Moreno says:

    Thanks a lot David for your amazing website.

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