19
votes
Accepted
Why is this tsumego solution wrong?
In tsumegos where you should kill a group, the best (and thus correct) answer is always the solution where you kill unconditionally (if possible). Only if there is no unconditional kill the ko would ...
- 416
7
votes
Accepted
Building a live group on a quarter board where two sides are already black
This has been discussed a lot in Sensei's Library (http://senseis.xmp.net/?BiggestCorner and http://senseis.xmp.net/?10x10CornerGame1). The consensus seems to be that white dies with 8 free spaces, ...
- 188
6
votes
How to attack White’s corner in this beginner’s 9x9 game?
TimK's answer is right on point on how to kill white in the corner, but your question belies a more general concern: Thinking "I need to kill all the things" is a very common beginner's mistake.
Take ...
- 6,682
4
votes
How does black kill white in this Tsumego?
Seems Black has to take the 1-2 vital point to avoid White making 2 eyes. If White begin to deprive Black's liberty from outside, then Black get connected by taking on 1-3 and White deprives outside ...
- 193
4
votes
Accepted
How does white win this capturing race?
This seems like a mistake to me. I don't see a way to win the race. I wonder if the point was that White now has a stable group, so this is a failure for black. White can hane underneath the stone on ...
- 3,258
3
votes
Accepted
How to attack White’s corner in this beginner’s 9x9 game?
This is a really broad question, and it depends on your level. The general idea is to reduce the opponent's eye space. D8-C8-B6 would probably be a good way to start:
$$Bc
$$ ---------------------
$$...
- 3,258
2
votes
Accepted
How does White survive in this corner?
To answer the original question: White's corner is unconditionally dead, it cannot be rescued even with White playing first. The points P1 and R1 are miai, when White takes one of them Black takes the ...
- 1,197
2
votes
Building a live group on a quarter board where two sides are already black
I'm not familiar with this as folklore, but the setup is similar to the setup a person might use to work on corner problems. I believe that this could be answered by looking a many examples of corner ...
- 231
2
votes
Why is this tsumego solution wrong?
The Black move 1 reduces the "three in a row" from two eyes to one. White cannot protect his "second" eye at 3 until he kills the marked stone (in red) with 2, because it would be self atari. Black ...
- 21.8k
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