Showing posts tagged: sunday-problem
Last week we had an extremely difficult problem, so I picked an easier one for this time. This problem is so classic that it is hard to say where it is originally from; my guess would be one of the classic tsumego collections.
Black to play.
This is an original problem by me, inspired by a shape that occurred in an ngd league game. This is one of the few cases I’ve seen where a real-game position leads to a difficult and interesting life-and-death problem.
This problem included a small competition, where the first person to post the correct answer would get one month of Kifu …
This is a classic problem from Gokyō Shumyō. There are in fact two solutions, but they lead to the same final shape.
Black to play.
Continuing with famous classic problems, this is problem 15 from Chō’s tsumego encyclopedia, advanced section.
Black to play.
Like last week’s problem, this is also from Guanzi Pu – and, in fact, also from Xuanxuan Qijing, where its title is 水落石出 (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.
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, 官子譜 or Endgame diagrams), this is clearly a life-and-death problem.
Black to play.
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 三段合格の死活150題, or 150 Graded Life-and-Death Problems for 3-Dan Players.
Black to play.
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.
This problem is from 秘伝問題集 (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 …
Similarly to Sunday Problem #29, this is from the Igo Hatsuyō-Ron.
Black to play.
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