Tsumegos from real games

jlt · Post by **jlt** » Mon Aug 15, 2022 3:39 am

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 · Post by **xela** » Mon Aug 15, 2022 4:21 am

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

First attempt (wrong)

Second attempt

jlt · Post by **jlt** » Wed Aug 24, 2022 6:15 am

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 · Post by **jlt** » Fri Oct 28, 2022 2:20 am

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

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

After the game move, White is dead.

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

Click Here To Show Diagram Code: [go]$$Wc a and b are miai $$ --------------------------------------- $$ | . . . . . . . O O a 8 7 O b 5 . . . . | $$ | . . . . . . X . X O 6 X X O X X . . . | $$ | . . . O X . . X X O . O . O O X . . . | $$ | . . 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 . . . |[/go]

jlt · Post by **jlt** » Sat Aug 26, 2023 2:09 am

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 · Post by **kvasir** » Sat Aug 26, 2023 1:58 pm

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

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

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 · Post by **jlt** » Sun Aug 27, 2023 1:02 am

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 · Post by **jlt** » Tue Oct 03, 2023 12:37 pm

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:

jlt · Post by **jlt** » Wed Dec 27, 2023 10:03 am

Problem #38, White to play.

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

kvasir · Post by **kvasir** » Thu Dec 28, 2023 9:11 am

Like this?

Click Here To Show Diagram Code: [go]$$Wc Black looks dead and triangle weakness doesn't go anywhere, right? $$ --------------------------------------- $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . X X O . . . . . . O . O X X . . . | $$ | . . X O . O . . . O O X . O O X . . . | $$ | . . X O . O . . O O X X . T . X . . . | $$ | . X X O . X O O X O . . . O . . . . . | $$ | . X O O . . X O X O X . X O . . . . . | $$ | . O . O . X . X X X . . X O X X X . . | $$ | . . O . 3 . 2 1 . . X . X O O O . . . | $$ | . . . O X X X O O O O X X X . . . . . | $$ | . . X X O O O O X X O O O . 5 4 . . . | $$ | . . . . X . . O O X X O . . . . . . . | $$ | . . X . . X O O X X . X O O O . . . . | $$ | . O X . . . O X . X X X . O X . . . . | $$ | . O X O X . O . X . . X . O X . . . . | $$ | . . O X X . . O O X . . . O X . . . . | $$ | . . O X O . . O X , . X . O X , X . . | $$ | . O X O O O O X X . . . . O X . . . . | $$ | . . . . . . X . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ ---------------------------------------[/go]

Click Here To Show Diagram Code: [go]$$Bc There is still only one eye if black goes for eyes. $$ --------------------------------------- $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . X X O . . . . . . O . O X X . . . | $$ | . . X O . O . . . O O X . O O X . . . | $$ | . . X O . O . . O O X X . . . X . . . | $$ | . X X O . X O O X O 4 2 3 O . . . . . | $$ | . X O O . . X O X O X 5 X O . . . . . | $$ | . O . O . X . X X X . 1 X O X X X . . | $$ | . . O . O . X O . 6 X . X O O O . . . | $$ | . . . O X X X O O O O X X X . . . . . | $$ | . . X X O O O O X X O O O . O X . . . | $$ | . . . . X . . O O X X O . . . . . . . | $$ | . . X . . X O O X X . X O O O . . . . | $$ | . O X . . . O X . X X X . O X . . . . | $$ | . O X O X . O . X . . X . O X . . . . | $$ | . . O X X . . O O X . . . O X . . . . | $$ | . . O X O . . O X , . X . O X , X . . | $$ | . O X O O O O X X . . . . O X . . . . | $$ | . . . . . . X . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ ---------------------------------------[/go]

jlt · Post by **jlt** » Tue Feb 06, 2024 2:51 am

Problem #39, Black to play.

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

Answer:

jlt · Post by **jlt** » Fri Mar 01, 2024 6:21 am

Problem #40, White to play. I've probably seen the problem before, but forgot it.

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

dfan · Post by **dfan** » Sat Mar 02, 2024 12:58 pm

Yeah, this one shows up in life and death manuals. I learned it as part of the J-group collection.

Harleqin · Post by **Harleqin** » Sat Mar 02, 2024 6:13 pm

jlt · Post by **jlt** » Mon Mar 04, 2024 12:26 am

Problem #41, Black to live.

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

Answer:

Life In 19x19

Tsumegos from real games

Re: Tsumegos from real games

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Re: Tsumegos from real games