Life In 19x19 :: L19 Go Problem Championship: Round 17

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L19 Go Problem Championship: Round 17 http://prod.lifein19x19.com/viewtopic.php?f=15&t=14338	Page 1 of 1

Author: Kirby [ Mon Jun 26, 2017 8:29 pm ]

Post subject: L19 Go Problem Championship: Round 17

Welcome to Round 17 of the L19 Go Problem Championship.

All problems are black to play. As usual, provide your solutions either via hide tags, or direct private message to me.

Problem 1 (3 points)

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

Problem 2 (6 points)

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

Problem 3 (9 points)

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

Have fun!

Author:	EdLee [ Mon Jun 26, 2017 9:05 pm ]
Post subject:
Symmetrical shape. Click Here To Show Diagram Code `[go]$$B Bent 4. Locally, W dead $$ --------------- $$ \| . 1 . O X . . $$ \| 3 O 2 O X . . $$ \| . 4 O X X . . $$ \| O O X , . . . $$ \| X X X . . . . $$ \| . . . . . . .[/go]` If all ko threats removed... Click Here To Show Diagram Code `[go]$$Bm5 tenuki/pass $$ --------------- $$ \| 1 X 4 O X . . $$ \| X O O O X . . $$ \| 3 O O X X . . $$ \| O O X , . . . $$ \| X X X . . . . $$ \| . . . . . . .[/go]` Click Here To Show Diagram Code `[go]$$Bm9 @ , W has no threats $$ --------------- $$ \| 2 3 O O X . . $$ \| 1 O O O X . . $$ \| . O O X X . . $$ \| O O X , . . . $$ \| X X X . . . . $$ \| . . . . . . .[/go]` ( "3 points": tricky for Bent 4, a confusing shape... ) If W never has time to fill in both throw-in spots, then W is dead. However, if W manages to fill them in, W can still get Bent 4: Click Here To Show Diagram Code `[go]$$B Interesting shape... $$ --------------- $$ \| 2 1 . O X . . $$ \| 3 O . O X . . $$ \| . . O X X . . $$ \| O O X , . . . $$ \| X X X . . . . $$ \| . . . . . . .[/go]` Click Here To Show Diagram Code `[go]$$B $$ ------------------------- $$ . . . 1 X X 2 O X 6 . . \| $$ . . X O X O . O X 4 . . \| $$ . . X X O . 3 O O X X . \| $$ . . , 7 O O O 5 X . . . \| $$ . . . X X X X X . X . . \| $$ . . . . . . . . . . . . \|[/go]` Click Here To Show Diagram Code `[go]$$B (a),(b) miai kill $$ ------------------------- $$ . . . 1 X X 3 O X . . . \| $$ . . X O X O a O X b . . \| $$ . . X X O . 2 O O X X . \| $$ . . , . O O O . X . . . \| $$ . . . X X X X X . X . . \| $$ . . . . . . . . . . . . \|[/go]` Click Here To Show Diagram Code `[go]$$B $$ ----------------------- $$ . . . . . . . . . . . \| $$ . X X O . 1 . . O X . \| $$ . . X . O . . O . X . \| $$ . , X . O . . O . X . \| $$ . . . X X . O . X . . \| $$ . . . . . X X X . . . \| $$ . . . . . . . . . . . \|[/go]`

Author:	Shaddy [ Tue Jun 27, 2017 7:31 am ]
Post subject:	Re: L19 Go Problem Championship: Round 17
Problem 1 (3 points) Click Here To Show Diagram Code `[go]$$Bc $$ --------------- $$ \| . 1 . O X . . $$ \| 3 O 2 O X . . $$ \| . . O X X . . $$ \| O O X , . . . $$ \| X X X . . . . $$ \| . . . . . . .[/go]` Problem 2 (6 points) Click Here To Show Diagram Code `[go]$$Bc $$ --------------------- $$ . . . 1 X X . O X . . . \| $$ . . X O X O 3 O X 2 . . \| $$ . . X X O . . O O X X . \| $$ . . , . O O O . X . . . \| $$ . . . X X X X X . X . . \| $$ . . . . . . . . . . . . \|[/go]` Problem 3 (9 points) Click Here To Show Diagram Code `[go]$$Bc $$ ---------------------- $$ . . . 0 9 6 7 . . . . \| $$ . X X O 2 1 8 . O X . \| $$ . . X . O 5 . O . X . \| $$ . , X . O 3 . O . X . \| $$ . . . X X 4 O . X . . \| $$ . . . . . X X X . . . \| $$ . . . . . . . . . . . \|[/go]` Ko?

Author:	Kirby [ Tue Jun 27, 2017 11:08 am ]
Post subject:	Re: L19 Go Problem Championship: Round 17
@EdLee: Yes, on Problems 1 & 2. Good start on Problem 3. @Shaddy: Looks good for first two problems. Ko is the solution for #3, but maybe you can do a bit better if white responds at , as in your diagram?

Author:	Monkey [ Fri Jun 30, 2017 3:33 pm ]
Post subject:	Re: L19 Go Problem Championship: Round 17
Kirby wrote: Welcome to Round 17 of the L19 Go Problem Championship. All problems are black to play. As usual, provide your solutions either via hide tags, or direct private message to me. Problem 1 (3 points) Click Here To Show Diagram Code `[go]$$Bc $$ --------------- $$ \| . 3 . O X . . $$ \| 1 O . O X . . $$ \| . 2 O X X . . $$ \| O O X , . . . $$ \| X X X . . . . $$ \| . . . . . . .[/go]` Problem 2 (6 points) Click Here To Show Diagram Code `[go]$$Bc $$ --------------------- $$ . . . 1 X X 2 O X 8 . . \| $$ . . X O X O 6 O X 4 . . \| $$ . . X X O 9 3 O O X X . \| $$ . . , 7 O O O 5 X . . . \| $$ . . . X X X X X . X . . \| $$ . . . . . . . . . . . . \|[/go]` Problem 3 (9 points) Click Here To Show Diagram Code `[go]$$Bc $$ ---------------------- $$ . . . . . . . . . . . \| $$ . X X O . . . . O X . \| $$ . . X . O . . O . X . \| $$ . , X . O . . O . X . \| $$ . . . X X . O . X . . \| $$ . . . . . X X X . . . \| $$ . . . . . . . . . . . \|[/go]` Have fun! Edited: looks like you messed up your hide tags. I've added them, but feel free to re-edit this post. --Hyperpape

Author:	hyperpape [ Fri Jun 30, 2017 3:47 pm ]
Post subject:	Re: L19 Go Problem Championship: Round 17
Problem 1 Click Here To Show Diagram Code `[go]$$Bc $$ --------------- $$ \| . 1 . O X . . $$ \| 3 O 2 O X . . $$ \| . 4 O X X . . $$ \| O O X , . . . $$ \| X X X . . . . $$ \| . . . . . . .[/go]` Bent four in the corner. Problem 2 Click Here To Show Diagram Code `[go]$$Bc $$ --------------------- $$ . . . 1 X X . O X 4 . . \| $$ . . X O X O 5 O X 2 3 . \| $$ . . X X O . . O O X X . \| $$ . . , . O O O . X . . . \| $$ . . . X X X X X . X . . \| $$ . . . . . . . . . . . . \|[/go]`

Author:	Kirby [ Fri Jun 30, 2017 5:21 pm ]
Post subject:	Re: L19 Go Problem Championship: Round 17
@Monkey: Looks good for problems 1 and 2.

Author:	Kirby [ Fri Jun 30, 2017 5:24 pm ]
Post subject:	Re: L19 Go Problem Championship: Round 17
@hyperpape: Problem 1 looks good. For problem 2, do you have a response for this? Click Here To Show Diagram Code `[go]$$Bc $$ --------------------- $$ . . . 1 X X 4 O X . . . \| $$ . . X O X O . O X 2 3 . \| $$ . . X X O . . O O X X . \| $$ . . , . O O O . X . . . \| $$ . . . X X X X X . X . . \| $$ . . . . . . . . . . . . \|[/go]`

Author:	hyperpape [ Sat Jul 01, 2017 10:47 am ]
Post subject:	Re: L19 Go Problem Championship: Round 17
Kirby wrote: @hyperpape: Problem 1 looks good. For problem 2, do you have a response for this? Click Here To Show Diagram Code `[go]$$Bc $$ --------------------- $$ . . . 1 X X . O X . . . \| $$ . . X O X O 3 O X 2 4 5 \| $$ . . X X O . . O O X X . \| $$ . . , . O O O . X . . . \| $$ . . . X X X X X . X . . \| $$ . . . . . . . . . . . . \|[/go]` Click Here To Show Diagram Code `[go]$$Bc $$ --------------------- $$ . . . 1 X X . O X . . . \| $$ . . X O X O 3 O X 2 b . \| $$ . . X X O . . O O X X . \| $$ . . , . O O O . X . . . \| $$ . . . X X X X X . X . . \| $$ . . . . . . . . . . . . \|[/go]` b can't make an extra eye, meaning B shouldn't play there

Author:	gamesorry [ Sun Jul 02, 2017 1:15 pm ]
Post subject:	Re: L19 Go Problem Championship: Round 17
1. Bent four in the corner Click Here To Show Diagram Code `[go]$$Bc $$ --------------- $$ \| . 1 . O X . . $$ \| 3 O 2 O X . . $$ \| . 4 O X X . . $$ \| O O X , . . . $$ \| X X X . . . . $$ \| . . . . . . .[/go]` 2. Oiotoshi Click Here To Show Diagram Code `[go]$$Bc $$ --------------------- $$ . . . 3 X X 2 O X 6 . . \| $$ . . X O X O . O X 4 . . \| $$ . . X X O . 1 O O X X . \| $$ . . , 7 O O O 5 X . . . \| $$ . . . X X X X X . X . . \| $$ . . . . . . . . . . . . \|[/go]` 3. Click Here To Show Diagram Code `[go]$$Bc $$ ---------------------- $$ . . b 9 0 7 8 . . . . \| $$ . X X O 4 1 2 . O X . \| $$ . . X c O 3 . O . X . \| $$ . , X a O 5 . O . X . \| $$ . . . X X 6 O . X . . \| $$ . . . . . X X X . . . \| $$ . . . . . . . . . . . \|[/go]`

Author:	Monkey [ Tue Jul 04, 2017 9:07 am ]
Post subject:	Re: L19 Go Problem Championship: Round 17
Problem 3 (9 points) Click Here To Show Diagram Code `[go]$$Bc $$ ---------------------- $$ . . . 8 . 7 . . . . . \| $$ . X X O 4 1 2 . O X . \| $$ . . X . O 3 . O . X . \| $$ . , X 9 O 5 . O . X . \| $$ . . . X X 6 O . X . . \| $$ . . . . . X X X . . . \| $$ . . . . . . . . . . . \|[/go]`

Author:	hyperpape [ Tue Jul 04, 2017 12:44 pm ]
Post subject:	Re: L19 Go Problem Championship: Round 17
Problem 3 Click Here To Show Diagram Code `[go]$$Bc $$ ---------------------- $$ . . . . 8 6 7 . . . . \| $$ . X X O 4 3 9 . O X . \| $$ . . X . O 5 . O . X . \| $$ . , X . O 1 . O . X . \| $$ . . . X X 2 O . X . . \| $$ . . . . . X X X . . . \| $$ . . . . . . . . . . . \|[/go]` Click Here To Show Diagram Code `[go]$$Bc $$ ---------------------- $$ . . . . . . . . . . . \| $$ . X X O 5 3 7 . O X . \| $$ . . X . O 4 . O . X . \| $$ . , X . O 1 2 O . X . \| $$ . . . X X . O . X . . \| $$ . . . . . X X X . . . \| $$ . . . . . . . . . . . \|[/go]` Click Here To Show Diagram Code `[go]$$Bc $$ ---------------------- $$ . . . . . . . . . . . \| $$ . X X O . . . . O X . \| $$ . . X . O 2 . O . X . \| $$ . , X . O 1 . O . X . \| $$ . . . X X . O . X . . \| $$ . . . . . X X X . . . \| $$ . . . . . . . . . . . \|[/go]`

Author:	Kirby [ Thu Jul 06, 2017 11:09 pm ]
Post subject:	Re: L19 Go Problem Championship: Round 17
I'm on vacation right now, and I'll be going to the US Go Congress after. So let's postpone this competition until mid-August.

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