Showing posts tagged: sunday-problem


Sunday Problem #16

This problem is from Xuanxuan Qijing, a Chinese tsumego collection classic from the 14th century; its English translation is named ‘Gateway to All Marvels’. This collection, along with Gokyō Shumyō, forms a set of tsumego books that all aspiring professional players learn by heart.

All problems in Xuanxuan Qijing have a title; this problem is called or ‘An Old …

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Sunday Problem #15

This problem is from a classic tsumego collection by Hon’inbō Shūsai called or Shikatsu Myōki. This name is notoriously difficult to translate into English: while shikatsu means life-and-death, myōki is a Buddhist term referring to excellent adhering to Buddhist teachings. Presumably this is meant in the sense that ‘if you manage to solve all these problems, your reading will …

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Sunday Problem #14

This problem is from my recent teaching game against Daniel Hu 5d in the bga Strong Player Development Programme. A review of the teaching game can be watched here.

Black to play.

Solution
Slightly suboptimal solution
Black’s hane of combined with the placement of 3 is a strong combination – however, Black has to be wary of White’s resistance …

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Sunday Problem #13

This problem is from the Japanese tsumego collection, or ‘Collection of Shūkō’s tsumego masterpieces’ by Fujisawa Hideyuki (whose first name can also be read as ‘Shūkō’).

I have received some feedback that the Sunday problems have been too difficult, so this week I tried to pick a slightly easier problem. Still, in my opinion it is not fun if …

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Sunday Problem #12

This problem is from another of my favorite tsumego collections, or ‘Collection of tsumego masterpieces’ by Sekiyama Riichi, Sekiyama Toshio, and Sekiyama Toshimichi.

Sekiyama Riichi is famous for winning the first Hon’inbō tournament in 1941; Sekiyama Toshio is his son; and Sekiyama Toshimichi is Toshio’s son. As a fun trivia, the ‘Ri’ in Riichi is written with the same …

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Sunday Problem #11

This is a slightly modified version of a problem that came up in the league game between bellicose and yosai.

Black to play.

Solution
Solution
Black 1 is the key point. White 2 is forced, but Black can then form the necessary eye space with the descent of 3. After 4–5, white 2 is captured in an oiotoshi, …

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Sunday Problem #10

This is the cover problem of Mateusz Surma’s tsumego book series You won’t get dumber while thinking.

Composing go problems is tough work. It can take hours just to come up with one good problem and, once you publish it, the problems themselves are not even copyright-protected – only the problem collection and the answers. This is why I …

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Sunday Problem #9

Like Sunday Problem #8, this is also from Guanzi Pu.

Black to play.

Solution
Correct solution
Black’s 2-1 placement of 1 is the key to solving this problem. 2–6 are White’s correct resistance, and the result is a kō for White’s life.
Black fails
If Black starts with the hane of 1, white 2 lives unconditionally.

Sunday Problem #8

This problem is from Guanzi Pu – possibly my favourite of the classic problem collections thanks to its varied and relatively difficult problems.

While a (most likely illegal) pdf version of the book been posted around on Western go websites, its solutions often seem to be wrong. I would instead recommend interested players to invest in a six-volume physical copy, …

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Sunday Problem #7

Black to play.

Solution
The result may look like a seki at first glance, but White is actually dead in a bulky five shape.

Events

All times are in Helsinki time (eet with summer time).


2nd Corona Cup on November 2 – December 15! Tournament details are here.


Gothenburg Online Open on December 5–6! Tournament details and registration are here.


New pairing for the online league made every 1st and 3rd Saturday of the month.


Public lectures on Twitch every 2nd and 4th Saturday of the month at 1 pm.


Jeff and Mikko stream on Twitch on Fridays at 6 pm.