Showing posts tagged: sunday-problem


Sunday Problem #6

This Sunday we have a set of two problems. What difference does Black’s extra liberty make?

Black to play in both problems.

Solution
KataGo’s solution
KataGo thinks the sequence from 1–5 is generally best for both sides: Black lives in gote while White makes a profit in the corner.
Tsumego solution
In tsumego terms, i.e., when life or death is …

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Sunday Problem #5

Black to play.

Solution
Black’s sacrifice technique with 3 and 5 is the key. This provides the two other black stones an extra liberty that allows Black to win a local capturing race with 7–11.

Sunday Problem #4

This problem was created by Lee Eodeokdung 1p. He showed to me at the European Go Congress 2017, and it quickly became one of my favourite tsumego.

Black to play.

Solution
White 2 is the strongest resistance to Black’s attachment of 1. Following...
...after black 7, White dies in a double ko. This is still better for White than dying unconditionally, as the group will supply infinite ko threats.

Sunday Problem #3

This is a famous tesuji problem.

If you can see the correct move at first glance, you have done your homework well! On the other hand, if you don’t, this can be a difficult nut to crack.

Black to play.

Solution
Initially, a and b look like miai: Black can either save her four stones with a and let White …

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Sunday Problem #2

This Sunday we have a challenging problem.

Problems with lots of open space or big eyes, such as this one, are difficult to read by brute force. Instead, you need to rely on your shape knowledge and, if that doesn’t help, on your shape intuition. The trick is to try to reduce the big and difficult-to-read shape into something smaller and more familiar.

Black to play.

Solution
Black 1 and 3 have to be played in this order. Following, black 5 and 7 reduce the white group to only one big eye.

Sunday Problem #1

Solving problems is a great way to improve one’s go skills, and is usually one of the most recommended activities to players who want to become strong. Playing many games is of course also important, but solving problems teaches you to analyse positions systematically. Additionally, you can solve problems whenever and wherever, while playing always requires an opponent – or …

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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.