Tsumegos from real games

Joaz Banbeck · **#81**

Problem #30:

kvasir · **#82**

jlt wrote:

Katago sees this:

jlt · **#83**

jlt · **#84**

kvasir · **#85**

kvasir · **#86**

Joaz Banbeck wrote:

Problem #30:

Joaz Banbeck · **#87**

kvasir wrote:

Joaz Banbeck wrote:

Problem #30:

Oops. I missed move 10.

Harleqin · **#88**

jlt · **#89**

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 :w3:

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 · **#90**

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

jlt · **#91**

Problem #33, Black to play. This one was DDK level, how could I miss it?

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

xela · **#92**

I wouldn't say DDK level. I fell into the temptation to be too clever...

First attempt (wrong)

Second attempt

jlt · **#93**

Problem #34, White to play

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

Answer

jlt · **#94**

Problem #35. This is from a correspondence game on OGS, 1d vs 2d, I was Black. We both misread the following life and death problem. White to play.

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

In the game White played

What is then the status of the white group, and what is the correct response for Black?

Answer

jlt · **#95**

Problem #36, Black to play.

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

kvasir · **#96**

Like this?

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

looks vital but can't connect with :b3:

Click Here To Show Diagram Code: [go]$$Bcm7 $$ | . . . . . O . X . . O . X O . . O . . | $$ | . . . X . . . X O . . . X O O . . O . | $$ | . . . X O . O X . . O . . O . O O . . | $$ | . . . X X X X X . X O . O . . . O X . | $$ | . . . , O O O O X X X X X X X X X O O | $$ | . . . . . X X O O X O O X O O . X X O | $$ | . . . . O X O O X O O X O . O O O O O | $$ | . . O . . O X O X O . X X O O X X O . | $$ | . . O X . . . . X O . . X O X X O O . | $$ | . . 5 . . X X X X O . W X O X O O X X | $$ | . . O O . X O O X O . O X X X O . X . | $$ | . X X O . X O O O 3 O . . . X X O O X | $$ | . . . X X 4 1 O . X O . X . . . X X . | $$ | . . . . . X O 2 X . . . . . . . . . . | $$ ---------------------------------------[/go]

White can also play a threat for :w8:

but I think black can protect

Click Here To Show Diagram Code: [go]$$Wcm8 $$ | . . . . . O . X . . O . X O . . O . . | $$ | . . . X . . . X O . . . X O O . . O . | $$ | . . . X O . O X 1 . O . . O . O O . . | $$ | . . . X X X X X 2 X O . O . . . O X . | $$ | . . . , O O O O X X X X X X X X X O O | $$ | . . . . . X X O O X O O X O O . X X O | $$ | . . . . O X O O X O O X O . O O O O O | $$ | . . O . . O X O X O . X X O O X X O . | $$ | . . O X . . . . X O . . X O X X O O . | $$ | . . 4 5 . X X X X O . O X O X O O X X | $$ | . . O O . X O O X O . O X X X O . X . | $$ | . X X O . X O O O 8 O . . . X X O O X | $$ | . . . X X 3 6 O . X O . X . . . X X . | $$ | . . . . . X O 7 X . . . . . . . . . . | $$ ---------------------------------------[/go]

Click Here To Show Diagram Code: [go]$$Wcm16 $$ | . . . . . O . X . . O . X O . . O . . | $$ | . . . X . . . X O . . . X O O . . O . | $$ | . . . X O . O X O . O . . O . O O . . | $$ | . . . X X X X X X X O . O . . . O X . | $$ | . . . , O O O O X X X X X X X X X O O | $$ | . . 5 . . X X O O X O O X O O . X X O | $$ | . . . . O X O O X O O X O . O O O O O | $$ | . . O . . O X O X O . X X O O X X O . | $$ | . . O X 2 . . . X O . . X O X X O O . | $$ | . 4 X O . X X X X O . O X O X O O X X | $$ | . . O O . X O O X O . O X X X O . X . | $$ | . X X O . X O O O X O . . . X X O O X | $$ | . . . X X 1 . O . X O . X . . . X X . | $$ | . . . . 3 X O O X . . . . . . . . . . | $$ ---------------------------------------[/go]

jlt · **#97**

I didn't show the whole board so there is not enough information to determine who wins the ko. Anyway what I missed in the game was that I could get a ko.

jlt · **#98**

Problem #37, White to play. Black has just invaded the corner on the top left, what can White do?

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

Possible variation:

Tsumegos from real games

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