Life In 19x19 :: L19 Go Problem Championship: Round 14

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L19 Go Problem Championship: Round 14 http://www.lifein19x19.com/viewtopic.php?f=15&t=14272	Page 1 of 1

Author: Kirby [ Mon May 29, 2017 8:40 pm ]

Post subject: L19 Go Problem Championship: Round 14

Welcome to Round 14 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]$$Bc $$ ------------------ $$ | . O . . . . X . . $$ | X O O . . O X . . $$ | O O X O O X X . . $$ | . X X X X . . . . $$ | . . . . . . . . .[/go]

Problem 2 (6 points)

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

Problem 3 (9 points)

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

Have fun!

Author:	EdLee [ Mon May 29, 2017 8:52 pm ]
Post subject:
Click Here To Show Diagram Code `[go]$$B $$ ------------------- $$ \| . O . 1 2 3 X . . $$ \| X O O . . O X . . $$ \| O O X O O X X . . $$ \| . X X X X . . . . $$ \| . . . . . . . . .[/go]` Click Here To Show Diagram Code `[go]$$B $$ ------------------- $$ \| . O . 1 3 . X . . $$ \| X O O . 2 O X . . $$ \| O O X O O X X . . $$ \| . X X X X . . . . $$ \| . . . . . . . . .[/go]` Click Here To Show Diagram Code `[go]$$B $$ ------------------- $$ \| . O . 1 . 2 X . . $$ \| X O O . 3 O X . . $$ \| O O X O O X X . . $$ \| . X X X X . . . . $$ \| . . . . . . . . .[/go]` Click Here To Show Diagram Code `[go]$$B $$ ------------------- $$ \| . O . 1 . 3 X . . $$ \| X O O 2 . O X . . $$ \| O O X O O X X . . $$ \| . X X X X . . . . $$ \| . . . . . . . . .[/go]` Click Here To Show Diagram Code `[go]$$B $$ --------------------- $$ . . . X O O 1 . O . \| $$ . . O O X . . X . X \| $$ . . O X X X X O X . \| $$ , . O . . . , O X . \| $$ . . . . O O . O O . \| $$ . . . . . . . . . . \|[/go]`

Author:	Shaddy [ Tue May 30, 2017 8:25 am ]
Post subject:	Re: L19 Go Problem Championship: Round 14
Problem 1 (3 points) Click Here To Show Diagram Code `[go]$$Bc $$ ------------------ $$ \| . O . 1 . . X . . $$ \| X O O . . O X . . $$ \| O O X O O X X . . $$ \| . X X X X . . . . $$ \| . . . . . . . . .[/go]` Problem 2 (6 points) Click Here To Show Diagram Code `[go]$$Bc $$ -------------------- $$ . . . X 5 . 1 . O . \| $$ . . O O X 3 . X 2 X \| $$ . . O X X X X O X . \| $$ , . O . . . , O X 4 \| $$ . . . . O O . O O . \| $$ . . . . . . . . . . \|[/go]` Problem 3 (9 points) Click Here To Show Diagram Code `[go]$$Bc $$ \| . . . . . . . . . . . . . $$ \| . . . O . . . . . . . . . $$ \| . . . . . . . . . . . . . $$ \| . . O O X X X . X X . . . $$ \| . O X X O O O 7 O . . . . $$ \| . O X O X 5 8 0 . , O . . $$ \| . . X O 2 3 9 . . X . O . $$ \| O . X O 1 6 . . . . X . . $$ \| . . . 4 . . . . . . . . . $$ --------------------------[/go]` Problem 3 (9 points) Click Here To Show Diagram Code `[go]$$Bc $$ \| . . . . . . . . . . . . . $$ \| . . . O . . . . . . . . . $$ \| . . . . . . . 9 . . . . . $$ \| . . O O X X X 2 X X . . . $$ \| . O X X O O O 4 O 0 a . . $$ \| . O X O X X O O 3 b O c . $$ \| . . X O O X X 1 5 X d O e $$ \| O . X O X O . . . 6 X f . $$ \| . . . O 8 . . . . 7 . g . $$ --------------------------[/go]` 5 is a minor tesuji. 6 is pure magic. Keep pulling problems from Fa Yang Lun, please

Author:	Kirby [ Tue May 30, 2017 9:34 am ]
Post subject:	Re: L19 Go Problem Championship: Round 14
@EdLee: Problem 1 is correct.

Author:	Kirby [ Tue May 30, 2017 9:38 am ]
Post subject:	Re: L19 Go Problem Championship: Round 14
@Shaddy: Problems 1 and 3 are correct. I agree that is amazing. I heard that Dosaku came up with this move. For Problem 2, do you have a response to this? Click Here To Show Diagram Code `[go]$$B $$ --------------------- $$ . . 2 C O O 1 . O . \| $$ . . O O X . . X . X \| $$ . . O X X X X O X . \| $$ , . O . . . , O X . \| $$ . . . . O O . O O . \| $$ . . . . . . . . . . \|[/go]`

Author:	Marcus [ Tue May 30, 2017 10:52 am ]
Post subject:	Re: L19 Go Problem Championship: Round 14
Oh, hey, I wonder if I can still do these. Quick shot at it: Problem 1: Click Here To Show Diagram Code `[go]$$Bc $$ ------------------ $$ \| . O . 1 3 5 X . . $$ \| X O O 2 4 O X . . $$ \| O O X O O X X . . $$ \| . X X X X . . . . $$ \| . . . . . . . . .[/go]` Problem 2: Click Here To Show Diagram Code `[go]$$Bc Best I could come up with $$ -------------------- $$ . . . X 7 C 1 5 O . \| $$ . . O O X 3 . X 4 X \| $$ . . O X X X X O C 6 \| $$ , . O . . . , O C 2 \| $$ . . . . O O . O O . \| $$ . . . . . . . . . . \|[/go]` Problem 3: Nifty Ladder? Click Here To Show Diagram Code `[go]$$Bc $$ \| . . . . . . . . . . . . . $$ \| . . . O . . . . . . . . . $$ \| . . . . . . . . . . . . . $$ \| . . O O X X X . X X . . . $$ \| . O X X O O O 7 O . . . . $$ \| . O X O 6 4 8 0 . , O . . $$ \| . . X O 2 3 9 . . X . O . $$ \| O . X O 1 . . . . . X . . $$ \| . . . 5 . . . . . . . . . $$ --------------------------[/go]` Click Here To Show Diagram Code `[go]$$Bcm11 $$ \| . . . . . . . . . . . . . $$ \| . . . O . . . . . . . . . $$ \| . . . . . . . 7 . . . . . $$ \| . . O O X X X 4 X X . . . $$ \| . O X X O O O 6 O 8 9 . . $$ \| . O X O W W W W 1 0 O . . $$ \| . . X O W B B 2 5 X . O . $$ \| O . X O B . . 3 . . X . . $$ \| . . . B . . . . . . . . . $$ --------------------------[/go]` Click Here To Show Diagram Code `[go]$$Bcm21 $$ \| . . . . . . . . . . . . . $$ \| . . . O . . . . . . . . . $$ \| . . . . . . . B . . . . . $$ \| . . O O X X X W X X . . . $$ \| . O X X O O O W O W B . . $$ \| . O X O W W W W B W O 1 . $$ \| . . X O W B B W B X 2 O 3 $$ \| O . X O B . . B . . X 4 5 $$ \| . . . B . . . . . . . 6 7 $$ --------------------------[/go]`

Author:	Shaddy [ Tue May 30, 2017 9:27 pm ]
Post subject:	Re: L19 Go Problem Championship: Round 14
Kirby wrote: @Shaddy: Problems 1 and 3 are correct. I agree that is amazing. I heard that Dosaku came up with this move. For Problem 2, do you have a response to this? Click Here To Show Diagram Code `[go]$$B $$ --------------------- $$ . . 2 C O O 1 . O . \| $$ . . O O X . . X . X \| $$ . . O X X X X O X . \| $$ , . O . . . , O X . \| $$ . . . . O O . O O . \| $$ . . . . . . . . . . \|[/go]` Ugh, of course it should be the other atari first, then after w captures make an eye. It's ko.

Author:	gamesorry [ Sat Jun 03, 2017 12:29 pm ]
Post subject:	Re: L19 Go Problem Championship: Round 14
1. Click Here To Show Diagram Code `[go]$$Bc $$ ------------------ $$ \| . O . 1 3 . X . . $$ \| X O O . 2 O X . . $$ \| O O X O O X X . . $$ \| . X X X X . . . . $$ \| . . . . . . . . .[/go]` 2. Ko Click Here To Show Diagram Code `[go]$$Bc $$ -------------------- $$ . . 2 X O O 5 4 O . \| $$ . . O O X 1 . X . X \| $$ . . O X X X X O X . \| $$ , . O . . . , O X 3 \| $$ . . . . O O . O O . \| $$ . . . . . . . . . . \|[/go]` Variation: B fails Click Here To Show Diagram Code `[go]$$Bc $$ -------------------- $$ . . 2 4 O O 1 . O . \| $$ . . O O X 3 . X 6 X \| $$ . . O X X X X O X . \| $$ , . O . . . , O X 5 \| $$ . . . . O O . O O . \| $$ . . . . . . . . . . \|[/go]` Variation: B fails Click Here To Show Diagram Code `[go]$$Bc $$ -------------------- $$ . . . X O O . . O . \| $$ . . O O X . . X 1 X \| $$ . . O X X X X O X . \| $$ , . O . . . , O X 2 \| $$ . . . . O O . O O . \| $$ . . . . . . . . . . \|[/go]` Variation: B fails Click Here To Show Diagram Code `[go]$$Bc $$ -------------------- $$ . . 4 X O O 3 1 O . \| $$ . . O O X . . X . X \| $$ . . O X X X X O X . \| $$ , . O . . . , O X 2 \| $$ . . . . O O . O O . \| $$ . . . . . . . . . . \|[/go]` 3. B1 should be the only move, however I couldn't figure out a way to capture w so far: Click Here To Show Diagram Code `[go]$$Bc $$ \| . . . . . . . . . . . . . $$ \| . . . O . . . . . . . . . $$ \| . . . . . . . . . . . . . $$ \| . . O O X X X . X X . . . $$ \| . O X X O O O 7 O . . . . $$ \| . O X O 6 4 8 9 e , O . . $$ \| . . X O 2 3 0 b d X . O . $$ \| O . X O 1 h a c f . X . . $$ \| . . . 5 . . . . g . . . . $$ --------------------------[/go]` Variation: Click Here To Show Diagram Code `[go]$$Bc $$ \| . . . . . . . . . . . . . $$ \| . . . O . . . . . . . . . $$ \| . . . . . . . e . . . . . $$ \| . . O O X X X b X X . . . $$ \| . O X X O O O 7 O f g . . $$ \| . O X O 6 4 8 0 a h O i . $$ \| . . X O 2 3 9 c n X j O k $$ \| O . X O 1 . . . . . X l m $$ \| . . . 5 . . . . . . . . . $$ --------------------------[/go]`

Author:	Shaddy [ Sun Jun 04, 2017 5:58 am ]
Post subject:	Re: L19 Go Problem Championship: Round 14
Problem 3 is not to capture White, but to save the 5 black stones.

Author:	unkx80 [ Mon Jun 05, 2017 6:14 am ]
Post subject:	Re: L19 Go Problem Championship: Round 14
Marcus wrote: Click Here To Show Diagram Code `[go]$$Bcm11 $$ \| . . . . . . . . . . . . . $$ \| . . . O . . . . . . . . . $$ \| . . . . . . . 7 . . . . . $$ \| . . O O X X X 4 X X . . . $$ \| . O X X O O O 6 O 8 9 . . $$ \| . O X O W W W W 1 0 O . . $$ \| . . X O W B B 2 5 X . O . $$ \| O . X O B . . 3 . . X . . $$ \| . . . B . . . . . . . . . $$ --------------------------[/go]` Your ladder won't work if W12 is played at W14.

Author:	Kirby [ Mon Jun 05, 2017 9:45 pm ]
Post subject:	Re: L19 Go Problem Championship: Round 14
@Marcus: See unkx80's comment regarding problem 3. Regarding Problem 2: Click Here To Show Diagram Code `[go]$$Bc Best I could come up with $$ -------------------- $$ . . 2 C O O 1 . O . \| $$ . . O O X . . X . X \| $$ . . O X X X X O X . \| $$ , . O . . . , O X . \| $$ . . . . O O . O O . \| $$ . . . . . . . . . . \|[/go]`

Author:	Kirby [ Mon Jun 05, 2017 9:46 pm ]
Post subject:	Re: L19 Go Problem Championship: Round 14
@gamesorry: Correct on problems 1 and 2. I hope Shaddy's clarification on problem 3 helped.

Author:	Kirby [ Mon Jun 05, 2017 9:52 pm ]
Post subject:	Re: L19 Go Problem Championship: Round 14
Solutions and updated leader board are given below. Problem 1 Problem 2 Problem 3 Leaderboard gamesorry - 157 EdLee - 109 dfan - 101 Shaddy - 85 Schachus - 77 hyperpape - 39 jeromie - 31 mongus - 19 Lanrose - 16 ez4u - 9 fractic - 6 Marcus - 5

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