Sunday Problem #68

This is an original problem arranged from a shape that appeared in a recent tournament game by Lukáš.

Black to play.


Sunday Problem #67

This is a classic tesuji problem that appears for example in Lee Chang-ho’s collection of tesuji problems.

Black to play.

Solution
Failure
Simply connecting at 1 does not cut it for Black. White extends his corner group’s liberties with 2, threatening to live with 3; if Black tries to prevent this with 3, then white 4 first captures Black.
Solution …

Read the full post here!


Oscar on Attacking: Investment and Profit

Streamed on Twitch on September 11, 2021.


Sunday Problem #66

This is a difficult variant of a classic tsumego that showed up in my recent lesson with Oscar.

Black to play.

Solution
Solution (1)
The hane of 1 is one way for the black group to live. If White descends to 2, Black jumps to 3, making a miai of ‘a’ and ‘b’.
Solution (2)
Things get more complicated if …

Read the full post here!


Online League on break for November and December

Brief announcement: this year, November and December will be break months for the online league. We teachers will then have a short breather and also think of ways to improve the programme in 2022.

Currently it is still possible to join for the regular two months in September and October: the full option is €80 and the half option €50. After the September league starts, we take one-month subscriptions for October: these are €40 for the full option and €25 for the half option.


Sunday Problem #65

This is an easier classic problem to counterweight the recent difficult problems. While the solution sequence is straightforward, it is however still quite long and makes for good visualisation training.

Black to play.

Solution
Solution (1)
Pretty much the only thing Black can try in this problem is the 1–3 squeeze. Following . . .
Solution (2)
. . . …

Read the full post here!


Matias on Flexibility in the Opening

Streamed on Twitch on August 28, 2021.


Sunday Problem #64

This gem of a problem is based on a shape from Guanzi Pu.

Black to play.

Solution
Solution (1)
This problem is difficult to solve if you’re not familiar with the tesuji of black 1. This sets up two ways for Black to get the forcing moves necessary to form life in the corner: 2–11 here is the first of …

Read the full post here!


Sunday Problem #63

This is a somewhat more challenging problem featuring a shape that could appear in a real game.

Black to play.

Solution
Failure
Black 1 may look like a promising move, but it lets white live with 2. Following, Black can get 3–8 in sente for a fairly good endgame profit, but this is still a failure because the core white …

Read the full post here!


Antti on Cockroach Style

Streamed on Twitch on August 14, 2021.