Life In 19x19 :: Nice Tesuji

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Nice Tesuji http://www.lifein19x19.com/viewtopic.php?f=11&t=17193	Page 1 of 1

Author:	00Noles [ Sun Jan 12, 2020 5:58 am ]
Post subject:	Nice Tesuji
As I always find real board problems quite interesting and helpful, I wanted to share with you a position, that occurred in one of my games. Quote: The black group on the right side of the board is in danger, but there is a way to safe those stones! Click Here To Show Diagram Code [go]$$ $$ +---------------------------------------+ $$ \| . . . . . . O . . . X O O . O O X . . \| $$ \| . . . . . O X X . X . X O O . O X O . \| $$ \| . . . O . O O X . . X X X . O X O O X \| $$ \| . . O , . O X X . X O . . O O X X X . \| $$ \| . O O X . X O . . X O O . O X X . X . \| $$ \| . O X X . X . . . . X O . . X O X O O \| $$ \| . X . . . . . . . . X O X X X O . O . \| $$ \| . X . . . . . . . . X X O O X O O . . \| $$ \| . O X X . . . . . . . . . O X X O . . \| $$ \| . O O X . . . . . , X X X O . X O . . \| $$ \| . O X . X . . X X X O X O O X X O . . \| $$ \| . . O X . . . . O O O O X O . X . O . \| $$ \| . . O . . X X X . . . . X O O . X . O \| $$ \| . O O O O O O . . X . X . X O O X X . \| $$ \| O . O X X . . O . . X . . X O X . . X \| $$ \| . O X , X . X O X O O X X X O X X X . \| $$ \| . X X . . X O O . X X O O X O O X O X \| $$ \| . . X X . X O . O O X O O O . O O O O \| $$ \| . . . X . X . . . . X X O . O . . . . \| $$ +---------------------------------------+[/go]

Author:	jlt [ Sun Jan 12, 2020 6:15 am ]
Post subject:	Re: Nice Tesuji
Click Here To Show Diagram Code `[go]$$ at $$ +---------------------------------------+ $$ \| . . . . . . O . . . X O O 9 O O X . . \| $$ \| . . . . . O X X . X . X O O 8 O X O . \| $$ \| . . . O . O O X . . X X X 7 O X O O X \| $$ \| . . O , . O X X . X O 3 2 O O X X X . \| $$ \| . O O X . X O . . X O O 1 O X X . X . \| $$ \| . O X X . X . . . . X O 4 5 X O X O O \| $$ \| . X . . . . . . . . X O X X X O . O . \| $$ \| . X . . . . . . . . X X O O X O O . . \|[/go]` Click Here To Show Diagram Code `[go]$$ at $$ +---------------------------------------+ $$ \| . . . . . . O . . . X O O 9 O O X . . \| $$ \| . . . . . O X X . X . X O O 8 O X O . \| $$ \| . . . O . O O X . . X X X 7 O X O O X \| $$ \| . . O , . O X X . X O 5 4 O O X X X . \| $$ \| . O O X . X O . . X O O 1 O X X . X . \| $$ \| . O X X . X . . . . X O 2 3 X O X O O \| $$ \| . X . . . . . . . . X O X X X O . O . \| $$ \| . X . . . . . . . . X X O O X O O . . \|[/go]`

Author:	bogiesan [ Sun Jan 12, 2020 7:39 am ]
Post subject:	Re: Nice Tesuji
Thanks for the post. I think white plays at 7 as soon as black plays 1.

Author:	jlt [ Sun Jan 12, 2020 8:28 am ]
Post subject:	Re: Nice Tesuji
I think White resigns as soon as Black plays because Black is leading by 40-50 points. But otherwise I would capture at S1 (which is sente), so that T2 is not sente anymore.

Author: Uberdude [ Mon Jan 13, 2020 2:49 pm ]

Post subject: Re: Nice Tesuji

Nice example of why you shouldn't play endgame sente too early (or as timesuji)!

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

P.S I'm guessing earlier there was this exchange, white 2 would have been better at a.

Click Here To Show Diagram Code: [go]$$ $$ +---------------------------------------+ $$ | . . . . . . O . . . X O O . O 2 X a . | $$ | . . . . . O X X . X . X O O . O X O . | $$ | . . . O . O O X . . X X X . O X O O 1 | $$ | . . O , . O X X . X O . . O O X X X . | $$ | . O O X . X O . . X O O . O X X . X . | $$ | . O X X . X . . . . X O . . X O X O O | $$ | . X . . . . . . . . X O X X X O . O . | $$ | . X . . . . . . . . X X O O X O O . . | $$ | . O X X . . . . . . . . . O X X O . . | $$ | . O O X . . . . . , X X X O . X O . . | $$ | . O X . X . . X X X O X O O X X O . . | $$ | . . O X . . . . O O O O X O . X . O . | $$ | . . O . . X X X . . . . X O O . X . O | $$ | . O O O O O O . . X . X . X O O X X . | $$ | O . O X X . . O . . X . . X O X . . X | $$ | . O X , X . X O X O O X X X O X X X . | $$ | . X X . . X O O . X X O O X O O X O X | $$ | . . X X . X O . O O X O O O . O O O O | $$ | . . . X . X . . . . X X O . O . . . . | $$ +---------------------------------------+[/go]

Author:	00Noles [ Wed Jan 15, 2020 12:17 am ]
Post subject:	Re: Nice Tesuji
Well done! Thanks for pointing out the subtleties of this position @uberdude ! You're right about the exchange in the top right

Author:	Kirby [ Wed Jan 15, 2020 8:57 am ]
Post subject:	Re: Nice Tesuji
Uberdude wrote: P.S I'm guessing earlier there was this exchange, white 2 would have been better at a. Click Here To Show Diagram Code [go]$$ $$ +---------------------------------------+ $$ \| . . . . . . O . . . X O O . O 2 X a . \| $$ \| . . . . . O X X . X . X O O . O X O b \| $$ \| . . . O . O O X . . X X X . O X O O 1 \| $$ \| . . O , . O X X . X O . . O O X X X . \| $$ \| . O O X . X O . . X O O . O X X . X . \| $$ \| . O X X . X . . . . X O . . X O X O O \| $$ \| . X . . . . . . . . X O X X X O . O . \| $$ \| . X . . . . . . . . X X O O X O O . . \| $$ \| . O X X . . . . . . . . . O X X O . . \| $$ \| . O O X . . . . . , X X X O . X O . . \| $$ \| . O X . X . . X X X O X O O X X O . . \| $$ \| . . O X . . . . O O O O X O . X . O . \| $$ \| . . O . . X X X . . . . X O O . X . O \| $$ \| . O O O O O O . . X . X . X O O X X . \| $$ \| O . O X X . . O . . X . . X O X . . X \| $$ \| . O X , X . X O X O O X X X O X X X . \| $$ \| . X X . . X O O . X X O O X O O X O X \| $$ \| . . X X . X O . O O X O O O . O O O O \| $$ \| . . . X . X . . . . X X O . O . . . . \| $$ +---------------------------------------+[/go] (I added “b”) Why would be better at “a”? White can’t get “b” with white “a” unless white captures - but that doesn’t seem worse than with .. and with , white could sacrifice stones in ko if necessary.

Author:	Uberdude [ Wed Jan 15, 2020 9:23 am ]
Post subject:	Re: Nice Tesuji
Kirby wrote: Why would be better at “a”? Because filled in one of white's own liberties which made the shortage of liberties tesuji of the game work for black.

Author:	Kirby [ Wed Jan 15, 2020 9:33 am ]
Post subject:	Re: Nice Tesuji
Uberdude wrote: Kirby wrote: Why would be better at “a”? Because filled in one of white's own liberties which made the shortage of liberties tesuji of the game work for black. Haha, yeah. I looked at this thread earlier but forgot the nuance here. I was too zoomed in on the local situation.

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