Tsumegos from real games

kvasir · Post by **kvasir** » Tue Dec 28, 2021 6:25 am

jlt wrote:Maybe try another move for ?

I found another move but the result seems to be the same.

First black's bad defense

Click Here To Show Diagram Code: [go]$$Wc Black's bad defense $$ --------------------------------------- $$ | . . O X . X X O . 5 . . . . . O . O . | $$ | . O . O X . X O . X 3 . X . O . O X . | $$ | . . O . O X X O O X 1 2 . X O O X . . | $$ | . . O , O O O . O , 4 X . X . O . . . | $$ | . . . . . . O . O O O O X X X O . . . | $$ | . . . . . . O . . . . . O O X O . O . | $$ | . . O . . . X O O . O O . . O X . . . | $$ | . . . O X . X X O O X O O O O . X . . | $$ | . . X . O X O X . . X X X X X . . . . | $$ | . . . X O . . . . , . . . . . X X . . | $$ | . . O O O O O X X X . X O . O O X X . | $$ | . . . O X X X . X . . X O . . . O O . | $$ | . X X O X . . . X X O O X . O O . O . | $$ | . O X . . X . X O . O X X . X X O O . | $$ | . O X X O O X X . O . O O X . . X O X | $$ | . . O X . . X O . O O X . . . X . X . | $$ | . . O X . X . . X X O X . . . . . . . | $$ | . . O O X . . . . . . X . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ ---------------------------------------[/go]

but it's seki from here

Click Here To Show Diagram Code: [go]$$Wc Seki from here $$ --------------------------------------- $$ | . . O X . X X O . . . . . . . O . O . | $$ | . O . O X . X O . X . . X 6 O . O X . | $$ | . . O . O X X O O X 1 3 5 X O O X . . | $$ | . . O , O O O . O 4 2 X . X . O . . . | $$ | . . . . . . O . O O O O X X X O . . . | $$ | . . . . . . O . . . . . O O X O . O . | $$ | . . O . . . X O O . O O . . O X . . . | $$ | . . . O X . X X O O X O O O O . X . . | $$ | . . X . O X O X . . X X X X X . . . . | $$ | . . . X O . . . . , . . . . . X X . . | $$ | . . O O O O O X X X . X O . O O X X . | $$ | . . . O X X X . X . . X O . . . O O . | $$ | . X X O X . . . X X O O X . O O . O . | $$ | . O X . . X . X O . O X X . X X O O . | $$ | . O X X O O X X . O . O O X . . X O X | $$ | . . O X . . X O . O O X . . . X . X . | $$ | . . O X . X . . X X O X . . . . . . . | $$ | . . O O X . . . . . . X . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ ---------------------------------------[/go]

For example

Click Here To Show Diagram Code: [go]$$Wcm7 $$ --------------------------------------- $$ | . . O X . X X O . 3 4 . 2 1 . O . O . | $$ | . O . O X . X O . X . 5 X X O . O X . | $$ | . . O . O X X O O X O O O X O O X . . | $$ | . . O , O O O . O X X X . X . O . . . | $$ | . . . . . . O . O O O O X X X O . . . | $$ | . . . . . . O . . . . . O O X O . O . | $$ | . . O . . . X O O . O O . . O X . . . | $$ | . . . O X . X X O O X O O O O . X . . | $$ | . . X . O X O X . . X X X X X . . . . | $$ | . . . X O . . . . , . . . . . X X . . | $$ | . . O O O O O X X X . X O . O O X X . | $$ | . . . O X X X . X . . X O . . . O O . | $$ | . X X O X . . . X X O O X . O O . O . | $$ | . O X . . X . X O . O X X . X X O O . | $$ | . O X X O O X X . O . O O X . . X O X | $$ | . . O X . . X O . O O X . . . X . X . | $$ | . . O X . X . . X X O X . . . . . . . | $$ | . . O O X . . . . . . X . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ ---------------------------------------[/go]

Maybe it's all wrong because my head seems to get stuck when I work out that big eye thing

jlt · Post by **jlt** » Tue Dec 28, 2021 7:02 am

I think White can get a ko with the following

In more detail:

Click Here To Show Diagram Code: [go]$$Wc White to play $$ --------------------------------------- $$ | . . O X . X X O . . . . . . . O . O . | $$ | . O . O X . X O . X . . X . O . O X . | $$ | . . O . O X X O O X 2 3 4 X O O X . . | $$ | . . O , O O O . O , 1 X . X . O . . . | $$ | . . . . . . O . O O O O X X X O . . . | $$ | . . . . . . O . . . . . O O X O . O . | $$ | . . O . . . X O O . O O . . O X . . . | $$ | . . . O X . X X O O X O O O O . X . . | $$ | . . X . O X O X . . X X X X X . . . . | $$ | . . . X O . . . . , . . . . . X X . . | $$ | . . O O O O O X X X . X O . O O X X . | $$ | . . . O X X X . X . . X O . . . O O . | $$ | . X X O X . . . X X O O X . O O . O . | $$ | . O X . . X . X O . O X X . X X O O . | $$ | . O X X O O X X . O . O O X . . X O X | $$ | . . O X . . X O . O O X . . . X . X . | $$ | . . O X . X . . X X O X . . . . . . . | $$ | . . O O X . . . . . . X . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ ---------------------------------------[/go]

This variation kills without condition:

Click Here To Show Diagram Code: [go]$$Wc White to play $$ --------------------------------------- $$ | . . O X . X X O . 5 . . . . . O . O . | $$ | . O . O X . X O . X 3 . X . O . O X . | $$ | . . O . O X X O O X 4 2 . X O O X . . | $$ | . . O , O O O . O , 1 X . X . O . . . | $$ | . . . . . . O . O O O O X X X O . . . | $$ | . . . . . . O . . . . . O O X O . O . | $$ | . . O . . . X O O . O O . . O X . . . | $$ | . . . O X . X X O O X O O O O . X . . | $$ | . . X . O X O X . . X X X X X . . . . | $$ | . . . X O . . . . , . . . . . X X . . | $$ | . . O O O O O X X X . X O . O O X X . | $$ | . . . O X X X . X . . X O . . . O O . | $$ | . X X O X . . . X X O O X . O O . O . | $$ | . O X . . X . X O . O X X . X X O O . | $$ | . O X X O O X X . O . O O X . . X O X | $$ | . . O X . . X O . O O X . . . X . X . | $$ | . . O X . X . . X X O X . . . . . . . | $$ | . . O O X . . . . . . X . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ ---------------------------------------[/go]

jlt · Post by **jlt** » Sat Feb 12, 2022 1:30 am

Problem #30, Black to play. What is Black's next move, and what is the status of the upper left corner?

Nothing fancy, just something rather elementary that I didn't realize before.

Click Here To Show Diagram Code: [go]$$Bc Black to play $$ --------------------------------------- $$ | . . . . . . . . . . . . . . . . . . . | $$ | O X X X X X . . . . . . . . O O O . . | $$ | O O X O O X O O . . . . . O X O X X . | $$ | X . O O O O X . . O . . . O X X . . . | $$ | . O O . X O X . X . O . O X . . . . . | $$ | . O X X . O X . . O . O . X . X X . . | $$ | . X . . . O O X X X O . . . O . O X . | $$ | . . . X X X X O . X X . X X X O . X . | $$ | . X X X . X O O . O . . . X O O X . . | $$ | . O O O X X X O . O . O O X O , O . . | $$ | . . . . O O O X X X O X X O . O . . . |[/go]

kvasir · Post by **kvasir** » Sat Feb 12, 2022 9:40 am

It doesn't look elementary to me at all.

I thought maybe seki.

Click Here To Show Diagram Code: [go]$$Bc Black to play $$ --------------------------------------- $$ | . 4 . 5 . 3 . . . . . . . . . . . . . | $$ | O X X X X X 2 . . . . . . . O O O . . | $$ | O O X O O X O O . . . . . O X O X X . | $$ | X . O O O O X . . O . . . O X X . . . | $$ | 6 O O . X O X . X . O . O X . . . . . | $$ | 1 O X X . O X . . O . O . X . X X . . | $$ | 7 X . . . O O X X X O . . . O . O X . | $$ | . . . X X X X O . X X . X X X O . X . | $$ | . X X X . X O O . O . . . X O O X . . | $$ | . O O O X X X O . O . O O X O , O . . | $$ | . . . . O O O X X X O X X O . O . . . |[/go]

There is the annoying hane but it doesn't appear to work.

Click Here To Show Diagram Code: [go]$$Bc Black to play $$ --------------------------------------- $$ | . . . . . . . . . . . . . . . . . . . | $$ | O X X X X X 1 . . . . . . . O O O . . | $$ | O O X O O X O O 3 . . . . O X O X X . | $$ | X . O O O O X . . O . . . O X X . . . | $$ | 0 O O . X O X . X . O . O X . . . . . | $$ | 9 O X X . O X . . O . O . X . X X . . | $$ | 2 X 5 . 6 O O X X X O . . . O . O X . | $$ | 8 4 . X X X X O . X X . X X X O . X . | $$ | 7 X X X . X O O . O . . . X O O X . . | $$ | . O O O X X X O . O . O O X O , O . . | $$ | . . . . O O O X X X O X X O . O . . . |[/go]

Click Here To Show Diagram Code: [go]$$Bcm11 Black to play $$ --------------------------------------- $$ | . 3 . . . . . . . . . . . . . . . . . | $$ | O X X X X X X . . . . . . . O O O . . | $$ | O O X O O X O O X . . . . O X O X X . | $$ | X . O O O O X . . O . . . O X X . . . | $$ | O O O . X O X . X . O . O X . . . . . | $$ | 2 O X X . O X . . O . O . X . X X . . | $$ | O X X . O O O X X X O . . . O . O X . | $$ | O O 1 X X X X O . X X . X X X O . X . | $$ | X X X X . X O O . O . . . X O O X . . | $$ | . O O O X X X O . O . O O X O , O . . | $$ | . . . . O O O X X X O X X O . O . . . |[/go]

Then maybe there are many ways to get a seki.

I thought the following didn't work...

Click Here To Show Diagram Code: [go]$$Bc Black to play $$ --------------------------------------- $$ | . . . . . . . . . . . . . . . . . . . | $$ | O X X X X X . . . . . . . . O O O . . | $$ | O O X O O X O O 1 . . . . O X O X X . | $$ | X . O O O O X 3 2 O . . . O X X . . . | $$ | . O O . X O X . X . O . O X . . . . . | $$ | . O X X . O X 4 . O . O . X . X X . . | $$ | . X . . . O O X X X O . . . O . O X . | $$ | . . . X X X X O . X X . X X X O . X . | $$ | . X X X . X O O . O . . . X O O X . . | $$ | . O O O X X X O . O . O O X O , O . . | $$ | . . . . O O O X X X O X X O . O . . . |[/go]

but it is not clear that white doesn't have a shortage of liberties here.

Click Here To Show Diagram Code: [go]$$Bc Black to play $$ --------------------------------------- $$ | . . . . . . . . . . . . . . . . . . . | $$ | O X X X X X . 3 . . . . . . O O O . . | $$ | O O X O O X O O 1 . . . . O X O X X . | $$ | X . O O O O X . 2 O . . . O X X . . . | $$ | . O O . X O X . X . O . O X . . . . . | $$ | . O X X . O X 4 . O . O . X . X X . . | $$ | . X . . . O O X X X O . . . O . O X . | $$ | . . . X X X X O . X X . X X X O . X . | $$ | . X X X . X O O . O . . . X O O X . . | $$ | . O O O X X X O . O . O O X O , O . . | $$ | . . . . O O O X X X O X X O . O . . . |[/go]

or

Click Here To Show Diagram Code: [go]$$Bc Black to play $$ --------------------------------------- $$ | . . . . . . . . . 8 . . . . . . . . . | $$ | O X X X X X . 4 2 5 6 . . . O O O . . | $$ | O O X O O X O O 1 7 . . . O X O X X . | $$ | X . O O O O X . 3 O . . . O X X . . . | $$ | . O O . X O X . X . O . O X . . . . . | $$ | . O X X . O X . . O . O . X . X X . . | $$ | . X . . . O O X X X O . . . O . O X . | $$ | . . . X X X X O . X X . X X X O . X . | $$ | . X X X . X O O . O . . . X O O X . . | $$ | . O O O X X X O . O . O O X O , O . . | $$ | . . . . O O O X X X O X X O . O . . . |[/go]

Maybe seki is acceptable?

jlt · Post by **jlt** » Sat Feb 12, 2022 11:16 am

Katago sees this:

Click Here To Show Diagram Code: [go]$$Bc $$ --------------------------------------- $$ | . 3 . 6 . 5 4 . . . . . . . . . . . . | $$ | O X X X X X 1 2 . . . . . . O O O . . | $$ | O O X O O X O O . . . . . O X O X X . | $$ | X . O O O O X . . O . . . O X X . . . | $$ | . O O . X O X . X . O . O X . . . . . | $$ | . O X X . O X . . O . O . X . X X . . | $$ | . X . . . O O X X X O . . . O . O X . | $$ | . . . X X X X O . X X . X X X O . X . | $$ | . X X X . X O O . O . . . X O O X . . | $$ | . O O O X X X O . O . O O X O , O . . | $$ | . . . . O O O X X X O X X O . O . . . |[/go]

Click Here To Show Diagram Code: [go]$$Bc $$ --------------------------------------- $$ | . X . O . X . 7 a . . . . . . . . . . | $$ | O X X X X X X O b . . . . . O O O . . | $$ | O O X O O X O O . . . . . O X O X X . | $$ | X . O O O O X . . O . . . O X X . . . | $$ | . O O . X O X . X . O . O X . . . . . | $$ | . O X X . O X . . O . O . X . X X . . | $$ | . X . . . O O X X X O . . . O . O X . | $$ | . . . X X X X O . X X . X X X O . X . | $$ | . X X X . X O O . O . . . X O O X . . | $$ | . O O O X X X O . O . O O X O , O . . | $$ | . . . . O O O X X X O X X O . O . . . |[/go]

White can't block at a, otherwise Black b. Black gets a picnic ko: either it's a seki and Black gets a free move elsewhere, or Black kills White's corner. Black has local ko threats (take a white liberty).

Hope this is correct.

Post by **Joaz Banbeck** » Sat Feb 12, 2022 11:57 am

Problem #30:

So maybe white tries the counter attack, but leaves the aji at J17

Click Here To Show Diagram Code: [go]$$Bc Black to play $$ --------------------------------------- $$ | . 8 . . . . . . . . . . . . . . . . . | $$ | O X X X X X 5 3 2 0 . . . . O O O . . | $$ | O O X O O X O O 1 9 . . . O X O X X . | $$ | X . O O O O X 6 4 O . . . O X X . . . | $$ | . O O . X O X 7 X . O . O X . . . . . | $$ | . O X X . O X . . O . O . X . X X . . | $$ | . X . . . O O X X X O . . . O . O X . | $$ | . . . X X X X O . X X . X X X O . X . | $$ | . X X X . X O O . O . . . X O O X . . | $$ | . O O O X X X O . O . O O X O , O . . | $$ | . . . . O O O X X X O X X O . O . . . |[/go]

Click Here To Show Diagram Code: [go]$$Bc Black to play $$ --------------------------------------- $$ | . O 3 . 6 . 5 4 7 . . . . . . . . . . | $$ | O X X X X X X X O O 2 . . . O O O . . | $$ | O O X O O X O O X X 1 . . O X O X X . | $$ | X . O O O O X O O O C . . O X X . . . | $$ | . O O . X O X X X . O . O X . . . . . | $$ | . O X X . O X . . O . O . X . X X . . | $$ | . X . . . O O X X X O . . . O . O X . | $$ | . . . X X X X O . X X . X X X O . X . | $$ | . X X X . X O O . O . . . X O O X . . | $$ | . O O O X X X O . O . O O X O , O . . | $$ | . . . . O O O X X X O X X O . O . . . |[/go]

Now it is two kos. I'm not really sure how this ends.

kvasir · Post by **kvasir** » Sat Feb 12, 2022 12:11 pm

jlt wrote:Katago sees this:

jlt · Post by **jlt** » Sat Feb 12, 2022 12:19 pm

jlt · Post by **jlt** » Sat Feb 12, 2022 12:42 pm

kvasir · Post by **kvasir** » Sat Feb 12, 2022 12:49 pm

Yeah getting the 1st line hane.

Click Here To Show Diagram Code: [go]$$Bc $$ --------------------------------------- $$ | . 3 . 0 . 9 8 . . . . . . . . . . . . | $$ | O X X X X X 1 2 . . . . . . O O O . . | $$ | O O X O O X O O . . . . . O X O X X . | $$ | X . O O O O X . . O . . . O X X . . . | $$ | . O O . X O X . X . O . O X . . . . . | $$ | . O X X . O X . . O . O . X . X X . . | $$ | 6 X 4 5 . O O X X X O . . . O . O X . | $$ | . 7 . X X X X O . X X . X X X O . X . | $$ | . X X X . X O O . O . . . X O O X . . | $$ | . O O O X X X O . O . O O X O , O . . | $$ | . . . . O O O X X X O X X O . O . . . |[/go]

Now black has the hane-capture and this very botty-clamp. I have lost a few capturing races to bots when they pull something like this but I am sort of lost.

Click Here To Show Diagram Code: [go]$$Bcm11 $$ --------------------------------------- $$ | . X . O . X O 3 . 5 . . . . . . . . . | $$ | O X X X X X X O 1 4 . . . . O O O . . | $$ | O O X O O X O O 2 . . . . O X O X X . | $$ | X . O O O O X . . O . . . O X X . . . | $$ | . O O . X O X . X . O . O X . . . . . | $$ | . O X X . O X . . O . O . X . X X . . | $$ | O X O X . O O X X X O . . . O . O X . | $$ | . X . X X X X O . X X . X X X O . X . | $$ | . X X X . X O O . O . . . X O O X . . | $$ | . O O O X X X O . O . O O X O , O . . | $$ | . . . . O O O X X X O X X O . O . . . |[/go]

kvasir · Post by **kvasir** » Sat Feb 12, 2022 1:08 pm

Joaz Banbeck wrote:Problem #30:

The cross cut might fail like this. At least I don't see what to do after white captures

Click Here To Show Diagram Code: [go]$$Bc Black to play $$ --------------------------------------- $$ | . . . . . . . 6 . . . . . . . . . . . | $$ | O X X X X X 4 3 2 5 8 . . . O O O . . | $$ | O O X O O X O O 1 . . . . O X O X X . | $$ | X . O O O O X . 7 O . . . O X X . . . | $$ | . O O . X O X . X . O . O X . . . . . | $$ | . O X X . O X . . O . O . X . X X . . | $$ | . X . . . O O X X X O . . . O . O X . | $$ | . . . X X X X O . X X . X X X O . X . | $$ | . X X X . X O O . O . . . X O O X . . | $$ | . O O O X X X O . O . O O X O , O . . | $$ | . . . . O O O X X X O X X O . O . . . |[/go]

Click Here To Show Diagram Code: [go]$$Bc Black to play $$ --------------------------------------- $$ | . . . . . . . 6 . . . . . . . . . . . | $$ | O X X X X X 4 3 2 5 . . . . O O O . . | $$ | O O X O O X O O 1 7 . . . O X O X X . | $$ | X . O O O O X 9 8 O . . . O X X . . . | $$ | . O O . X O X . X . O . O X . . . . . | $$ | . O X X . O X 0 . O . O . X . X X . . | $$ | . X . . . O O X X X O . . . O . O X . | $$ | . . . X X X X O . X X . X X X O . X . | $$ | . X X X . X O O . O . . . X O O X . . | $$ | . O O O X X X O . O . O O X O , O . . | $$ | . . . . O O O X X X O X X O . O . . . |[/go]

Post by **Joaz Banbeck** » Sat Feb 12, 2022 4:12 pm

kvasir wrote:
Joaz Banbeck wrote:Problem #30:

The cross cut might fail like this. At least I don't see what to do after white captures
...

$$Bc Black to play
$$ ---------------------------------------
$$ | . . . . . . . 6 . . . . . . . . . . . |
$$ | O X X X X X 4 3 2 5 . . . . O O O . . |
$$ | O O X O O X O O 1 7 . . . O X O X X . |
$$ | X . O O O O X 9 8 O . . . O X X . . . |
$$ | . O O . X O X . X . O . O X . . . . . |
$$ | . O X X . O X 0 . O . O . X . X X . . |
$$ | . X . . . O O X X X O . . . O . O X . |
$$ | . . . X X X X O . X X . X X X O . X . |
$$ | . X X X . X O O . O . . . X O O X . . |
$$ | . O O O X X X O . O . O O X O , O . . |
$$ | . . . . O O O X X X O X X O . O . . . |
Click Here To Show Diagram Code
[go]$$Bc Black to play $$ --------------------------------------- $$ | . . . . . . . 6 . . . . . . . . . . . | $$ | O X X X X X 4 3 2 5 . . . . O O O . . | $$ | O O X O O X O O 1 7 . . . O X O X X . | $$ | X . O O O O X 9 8 O . . . O X X . . . | $$ | . O O . X O X . X . O . O X . . . . . | $$ | . O X X . O X 0 . O . O . X . X X . . | $$ | . X . . . O O X X X O . . . O . O X . | $$ | . . . X X X X O . X X . X X X O . X . | $$ | . X X X . X O O . O . . . X O O X . . | $$ | . O O O X X X O . O . O O X O , O . . | $$ | . . . . O O O X X X O X X O . O . . . |[/go]

Oops. I missed move 10.

Harleqin · Post by **Harleqin** » Mon Feb 14, 2022 2:57 am

jlt · Post by **jlt** » Mon Mar 14, 2022 12:31 am

Problem #31, White to play. Interesting life and death situation on the bottom right.

Click Here To Show Diagram Code: [go]$$Wc $$ --------------------------------------- $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . O . . . . . . | $$ | . . . . . . . . . . . O . O O O X . . | $$ | . . . O . . . . . , . . O X X O X . . | $$ | . . . . . . . . . . . . . X O X X . . | $$ | . . O . . . . . . . . . . X O O . . . | $$ | . . . . . . . . . . . . . X X O . X . | $$ | . . . . . . . . . . . . X . X O . . . | $$ | . . . . . . . . . X . . X X O . . . . | $$ | . . . , . . . . . , . . O O O O O . . | $$ | . . . . . . . . . . . . O X X O X . . | $$ | . . . . . . . . . . . X O O X X X . . | $$ | . . . . . . . . . . . X . O X O . . . | $$ | . . . . . . . . . . . . . O O X X . . | $$ | . . . . . . . . . . X O . . . . . . . | $$ | . . X , . . . . X , X O . . O O O . . | $$ | . . . . . X . X . . O O X X X X X . . | $$ | . . . . . . . O O . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ ---------------------------------------[/go]

Possible answer:

Click Here To Show Diagram Code: [go]$$Wc $$ --------------------------------------- $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . O . . . . . . | $$ | . . . . . . . . . . . O . O O O X . . | $$ | . . . O . . . . . , . . O X X O X . . | $$ | . . . . . . . . . . . . . X O X X . . | $$ | . . O . . . . . . . . . . X O O . . . | $$ | . . . . . . . . . . . . . X X O . X . | $$ | . . . . . . . . . . . . X . X O . . . | $$ | . . . . . . . . . X . . X X O . . . . | $$ | . . . , . . . . . , . . O O O O O 7 . | $$ | . . . . . . . . . . . . O X X O X 5 . | $$ | . . . . . . . . . . . X O O X X X 6 . | $$ | . . . . . . . . . . . X . O X O . . . | $$ | . . . . . . . . . . . . . O O X X 2 . | $$ | . . . . . . . . . . X O . . . . . 1 . | $$ | . . X , . . . . X , X O . . O O O . . | $$ | . . . . . X . X . . O O X X X X X 3 . | $$ | . . . . . . . O O . . . . . . . . 4 . | $$ | . . . . . . . . . . . . . . . . . . . | $$ ---------------------------------------[/go]

Black's side group is dead.
The goal of the exchange

is to avoid sequences such as

Click Here To Show Diagram Code: [go]$$Wc $$ --------------------------------------- $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . O . . . . . . | $$ | . . . . . . . . . . . O . O O O X . . | $$ | . . . O . . . . . , . . O X X O X . . | $$ | . . . . . . . . . . . . . X O X X . . | $$ | . . O . . . . . . . . . . X O O . . . | $$ | . . . . . . . . . . . . . X X O . X . | $$ | . . . . . . . . . . . . X . X O . . . | $$ | . . . . . . . . . X . . X X O . . . . | $$ | . . . , . . . . . , . . O O O O O 5 . | $$ | . . . . . . . . . . . . O X X O X 3 . | $$ | . . . . . . . . . . . X O O X X X 4 7 | $$ | . . . . . . . . . . . X . O X O 9 . 8 | $$ | . . . . . . . . . . . . . O O X X 2 6 | $$ | . . . . . . . . . . X O . . . . . 1 . | $$ | . . X , . . . . X , X O . . O O O 0 . | $$ | . . . . . X . X . . O O X X X X X a . | $$ | . . . . . . . O O . . . . . . . . b . | $$ | . . . . . . . . . . . . . . . . . . . | $$ ---------------------------------------[/go]

however White could have made the exchange a-b at anytime.

jlt · Post by **jlt** » Thu May 05, 2022 2:43 am

Problem #32, Black to play.

Click Here To Show Diagram Code: [go]$$Bc Black to play $$ --------------------------------------- $$ | . . . . . . X . . . . . . . . . . . . | $$ | . . X X X . . O O . . . X O X . . . . | $$ | . X . X O X X O X . O X X X O O O . . | $$ | . . X O O O O X O O . O . . X X X O . | $$ | . . O . . . . X O . O . . X . . . . . | $$ | . . O . . . O X X O . O O O O . . . . | $$ | . . . . O . O X X X O X X O . . . . . | $$ | . . X . . . . O . O . O X . . . X . . | $$ | . . . . O . O . . O O O X . . . O X . | $$ | . . . , . . . . . , O X . X . X X O . | $$ | . . X X X . . . . O X . X . . . . O . | $$ | . . O . . . . X . X . . . O O . O . X | $$ | . . O X X . . . . . . . X X . O . O . | $$ | . . . O . . . . . . . . . . . X O O . | $$ | . . . . . . . . . . . . . . . X X O . | $$ | . . . O . . O O X , . . . . . , . X . | $$ | . . O . . O . X X . . . X . . X . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ ---------------------------------------[/go]

Answer:

In the game I played

My opponent didn't manage to punish

Click Here To Show Diagram Code: [go]$$Bc Wrong move $$ --------------------------------------- $$ | . . . . . . X . . . . . . . . 8 . 7 . | $$ | . . X X X . . O O . . . X O X 5 6 1 4 | $$ | . X . X O X X O X . O X X X O O O 2 . | $$ | . . X O O O O X O O . O . . X X X O . | $$ | . . O . . . . X O . O . . X . . . 3 . | $$ | . . O . . . O X X O . O O O O . . . . | $$ | . . . . O . O X X X O X X O . . . . . | $$ | . . X . . . . O . O . O X . . . X . . | $$ | . . . . O . O . . O O O X . . . O X . | $$ | . . . , . . . . . , O X . X . X X O . | $$ | . . X X X . . . . O X . X . . . . O . | $$ | . . O . . . . X . X . . . O O . O . X | $$ | . . O X X . . . . . . . X X . O . O . | $$ | . . . O . . . . . . . . . . . X O O . | $$ | . . . . . . . . . . . . . . . X X O . | $$ | . . . O . . O O X , . . . . . , . X . | $$ | . . O . . O . X X . . . X . . X . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ ---------------------------------------[/go]

Click Here To Show Diagram Code: [go]$$Bc Wrong move $$ --------------------------------------- $$ | . . . . . . X . . . . . . a . 6 . 5 . | $$ | . . X X X . . O O . . . X O X . . 1 4 | $$ | . X . X O X X O X . O X X X O O O 2 . | $$ | . . X O O O O X O O . O . . X X X O b | $$ | . . O . . . . X O . O . . X . . . 3 . | $$ | . . O . . . O X X O . O O O O . . . . | $$ | . . . . O . O X X X O X X O . . . . . | $$ | . . X . . . . O . O . O X . . . X . . | $$ | . . . . O . O . . O O O X . . . O X . | $$ | . . . , . . . . . , O X . X . X X O . | $$ | . . X X X . . . . O X . X . . . . O . | $$ | . . O . . . . X . X . . . O O . O . X | $$ | . . O X X . . . . . . . X X . O . O . | $$ | . . . O . . . . . . . . . . . X O O . | $$ | . . . . . . . . . . . . . . . X X O . | $$ | . . . O . . O O X , . . . . . , . X . | $$ | . . O . . O . X X . . . X . . X . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ ---------------------------------------[/go]

Life In 19x19

Tsumegos from real games

Re: Tsumegos from real games

Re: Tsumegos from real games

Re: Tsumegos from real games

Re: Tsumegos from real games

Re: Tsumegos from real games

Re: Tsumegos from real games

Re: Tsumegos from real games

Re: Tsumegos from real games

Re: Tsumegos from real games

Re: Tsumegos from real games

Re: Tsumegos from real games

Re: Tsumegos from real games

Re: Tsumegos from real games

Re: Tsumegos from real games

Re: Tsumegos from real games