Malcolm

PageType: HomePage   Difficulty: Advanced   Keywords: EndGame, Life & Death, Problem

Malcolm Schonfield's home page. I'm a 1D in france, 1D on KGS.

Table of contents Table of diagrams
1: problem
1: solution from book
1: Mistake
1: Answer
2: problem
2: solution
3: problem
3: solution 1:
4: problem
4: Solution
5: problem
5: solution
5: mistake
5: continuation
6: Problem diagram
6: Solution from book
6: Stumped
6: unkx80's suggestion
6: I'm still stumped
7: Connection tesuji
7: A possible follow-up: ko
7: No ko, but Black escapes
7: Mistake
7: Alternate solution

1: Tsumego

Here's a tsumego I was having problems with:

[Diagram]

1: problem

[Diagram]

1: solution from book

The solution (from "get strong like a pro") gives black killing white

This seems to work too

[Diagram]

1: Mistake

I was stuck for a long time on finding the correct answer to W2.

[Diagram]

1: Answer

unkx80: I think Black should play B3 and B5. See joseki-related life-and-death example 9.

Malcolm: Thanks, the same day you gave me the solution I ended up using Thomas Wolff's GoTools tsumego program to get the answer. I had a blind spot, overlooking the double atari at 'b'.


2: Yose

Here's a yose problem I like with a nice double snap-back:

[Diagram]

2: problem

[Diagram]

2: solution


3: Nice tsumego from TrainLikeAPro

[Diagram]

3: problem

A nice tsumego from TrainLikeAPro volume 2

[Diagram]

3: solution 1:

It took me ages to find this solution. I think I had a blind spot due to the following erroneous reasoning: "after 6 white has two eyes and is therefore alive. There is no need to look any further". Lesson to be learned: two eyes are sometimes not enough! Or: beware of damezumari!


4: Tsumego

Here's a nice tsumego I found in an old volume of the french go magazine RFG (n° 89, 2000), in an article by Pierre Audouard. It took me about 15 minutes this morning to solve!

[Diagram]

4: problem

[Diagram]

4: Solution


5: Under the stones tsumego

Here's an under-the stones tsumego from TrainLikeAPro volume 2. It took me days to realise why "a" is wrong - another damezumari I missed.

[Diagram]

5: problem

The correct solution starts at "b" :

[Diagram]

5: solution

B5 at BS. Result is a direct ko with the first threat to be found by the defender.

[Diagram]

5: mistake

B5 at BS.

[Diagram]

5: continuation

Dead.


6: Unusual tsumego from TrainLikeAPro

31-1-07 : I'm completely stumped by the following problem from TrainLikeAPro, vol. 1, day 2.

[Diagram]

6: Problem diagram

[Diagram]

6: Solution from book

Ko.

[Diagram]

6: Stumped

I do not know how black deals with W4. Looks to me like white lives. so, what am I missing?

[Diagram]

6: unkx80's suggestion

unkx80: The first answer that comes to my mind is B5. No, this is not a typo.

[Diagram]

6: I'm still stumped

I did consider B5. But if W1 in this diagram, what else is there but B2? Then, white lives with W3.

unkx80: This means that I made a reading typo when suggesting B5 in the previous diagram. Right now I see no solution to your W4.

Malcolm: OK. I've updated TrainLikeAPro with this analysis. It does seem like an error in the book. Hope you don't mind me using your name. Thanks for the help.


7: Connection

[Diagram]

7: Connection tesuji

This position comes from a 9 stone handicap game I played recently. In the game, the marked black stones were under attack. But 1 is a nice tesuji to escape. Credit goes to MotokiNoguchi? for pointing it out. 07-04-18

[Diagram]

7: A possible follow-up: ko

[Diagram]

7: No ko, but Black escapes

[Diagram]

7: Mistake

If White plays 4, he lets Black live and loses points on the side: very bad.

[Diagram]

7: Alternate solution

unkx80: I thought, there might be multiple solutions to this problem. If W2 at W4, then B3 and W2, which reverts to one of your earlier diagrams.

Malcolm: Yes, you're right. Thanks for the comment.


This is a copy of the living page "Malcolm" at Sensei's Library.
(OC) 2007 the Authors, published under the OpenContent License V1.0.
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