Sunday Problem #58
This is a classic tesuji problem.
Black to play.
Solution
Because the black stones to the right only have three liberties, the wedge of 1 is the only possible starting move. After white 2, black 3 quickly starts reducing the white stones’ liberties, and, after 7, White is unable to save all of his stones.
White has …
Jeff on Managing Time Pressure – Compilation
This is a compilation of the lecture held on April 10, 2021. Thanks to Mikgo for the editing work!
Sunday Problem #57
This is a classic tsumego that sharp-eyed readers may remember from Hikaru no Go.
Black to play.
Solution
Black 1 is the correct starting move; most other killing attempts fail to White playing at 1. Following, after white 2, 3–5 strictly reduce White to one eye.
If white tries 5 instead of 2, then black 4 kills.
Antti on Control Go (How to Win With One-Space Jumps and Two-Space Extensions)
Streamed on Twitch on July 3, 2021.
Sunday Problem #56
This is a tricky problem that featured in the recent Go JAM. I cannot quite remember the origin of this problem; I vaguely recall seeing this in one of Go Seigen’s tsumego collections, but could not quickly find it again.
Black to play.
Solution
The attachment of 1 is probably the first move that comes to mind, but …
BesoGo viewer updated
Hi folks!
This is just an announcement to let you know that the BesoGo sgf viewer on this site has been slightly updated. There is a new feature: when inside a variation, you can press shift+left to immediately scroll back to the move where the variation branched off. This should make the reading of variations, and the subsequent navigation to the main line of the game slightly easier.
If the feature does not seem to work for you, make sure to make a hard refresh of the page, first (shift+f5).
Thanks to ronm for making this update possible!
Sunday Problem #55
This is a classic problem whose simplified version can for example be found in the Gokyō Shumyō.
This shape can arise from a relatively common corner jōseki where a player invades the opponent’s star-point keima enclosure.
Black to play.
This is the origin of the shape. The triangle-marked stones have been added to prevent Black from getting outer sente moves …
Sunday Problem #54
This problem is from the Korean tsumego connection 天龍図, known in Japan as Tenryūzu. The name might be translated into English as ‘Sky Dragon Diagrams’. Most of the problems in the collection are notoriously difficult, making it good practice material for aspiring professional players.
For this Sunday Problem, I tried to pick a relatively easier problem from the …
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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.
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