Sunday Problem #41

This is an original tsumego by me. The solution sequence for this is not particularly outstanding, but as a tsumego this has value in that this position can easily result from a particular 3-3 invasion jōseki.

Black to play.

Solution
Solution
Black’s straightforward attack with 1–5 is correct, and the result is a two-step kō.
Black can also start by attaching at
a, after which white b and 1–5 follow; the result is practically the same.

Jeff on Enduring

Streamed on Twitch on March 13, 2021.

See full post to read kifu annotations!


Sunday Problem #40

This is a problem from Chō Chikun’s Yose no Tesuji (), or Endgame Tesuji.

Black to play.

Solution
Solution
Black’s attachment of 1 is the key move. If White tries to resist with 2, then he gets captured by 3–5.
Instead of 2, White has no choice but to play 3 himself and sacrifice the two stones to the right.

3rd Corona Cup starts on March 8

The 3rd Corona cup, organised by ngd teacher Lukáš Podpěra, will be held from March 8 to April 20. This time, the tournament is part of the 2020 European Grand Prix as a bonus point c class tournament.

As usual, two of our other teachers, me and Jeff, will work in the tournament anti-cheating department to ensure fair play. …

Read the full post here!


Sunday Problem #39

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.

Solution
Solution
Black 1 and 3 are an exquisite move order. White has no resistance available and, up to 7, White is captured.
7 at 5
Failure
Black 1 here is wrong. This time, Black can only manage a kō for the white group’s life.

Oscar on Winning Won Games

Streamed on Twitch on February 27, 2021.



Sunday Problem #38

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 …

Read the full post here!


Second ‘Go Jam’ on Saturday, February 20, 1pm EET

Today at 1pm Helsinki time, Jeff, Antti, and Mikkgo will host the second ‘Go Jam’ on Mikkgo’s Twitch channel.

While the content of the stream is of course go-related, it is more geared towards the philosophical and psychological side of playing the game rather than particular patterns. As usual, everybody is welcome to follow and participate!