Sunday Problem #36

Continuing with famous classic problems, this is problem 15 from Chō’s tsumego encyclopedia, advanced section.

Black to play.

Solution
Solution
Black’s 1–3 combination is the only order of moves that works. The main challenge in this problem is finding black 3, which becomes a kind of blind spot due to its bad shape.

Sunday Problem #35

Like last week’s problem, this is also from Guanzi Pu – and, in fact, also from Xuanxuan Qijing, where its title is (sui-raku-seki-shutsu). Literally this means a river’s water receding and the riverbed’s rocks’ becoming visible, but the figurative meaning is that of truth becoming revealed.

Black to play.

Solution
Solution
This diagram shows White’s strongest resistance. …

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Ōhashi Hirofumi’s Banri Ikkū

I love the smell of tsumego in the morning.

I just received in mail the newest, recently-published tsumego book from Ōhashi Hirofumi 6p, our Nihon Ki-In English class member as well as a regular visitor to European go tournaments. The problem collection includes some of Ōhashi’s most interesting creations from the past 20 years, with the difficulty level of …

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First ‘Go Jam’ on Saturday, January 30, 1pm EET

This Saturday at 1pm Helsinki time, Jeff, Antti, and Mikkgo will hold a ‘Go Jam’ on Mikkgo’s Twitch channel.

While the content of the stream is of course go-related, the discussion will be less about particular go patterns and more about the philosophical and psychological side of playing the game. As usual, everybody is welcome to follow and participate!


Sunday Problem #34

This is a slightly modified problem from Guanzi Pu. Although most of Guanzi Pu’s content is endgame (it’s even in the collection’s name, or Endgame diagrams), this is clearly a life-and-death problem.

Black to play.

Solution
Solution (1)
Black has no choice but to start by driving White down to the first line with 1–6. After this, however, …

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Matias on Uncertainty and Risks

Streamed on Twitch on January 23, 2021.


Sunday Problem #33

Here is an easier problem a ridiculously difficult endgame problem that somehow found its way to a life-and-death problem collection.

This is from the Nihon Ki-In’s 150, or 150 Graded Life-and-Death Problems for 3-Dan Players.

Black to play.

Solution
Gote seki
The book mistakenly says that the bump of black 1 is correct, followed by white …

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Sunday Problem #32

This is an original problem I thought up two days ago. The shape is closely linked to Sunday Problem #31, but this problem highlights an aspect of the base problem that people more rarely think about.

Black to play.

Solution
Solution (1)
Black 1 is the correct starting move – even though at first glance it appears to make …

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Oscar on Judging the Value of Territory

Streamed on Twitch on January 9, 2021.


Sunday Problem #31

This problem is from (Hiden Mondaishū, or Secret Problem Collection) by Hon dōjō, whose students include Fujisawa Rina 4p, Ichiriki Ryō 8p, and Shibano Toramaru 9p. The creators of the collection most likely had Igo Hatsuyō-Ron as their model, what with its originally having been a secret of the Inoue school, but having Mynavi openly publish the …

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