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 Post subject: L19 Go Problem Championship: Round 6
Post #1 Posted: Fri Mar 24, 2017 11:18 pm 
Judan

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Welcome to Round 6 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 O X . .
$$ | . O O X X X X . .
$$ | . X X , . . . . .
$$ | . . . . . . . . .[/go]


Problem 2 (6 points)
Click Here To Show Diagram Code
[go]$$Bc
$$ -----------------
$$ . . . . . O . O . |
$$ . X X . . . O X . |
$$ . X O O . . O X . |
$$ . X O . X O X . . |
$$ . X O O O O X . . |
$$ . . X X X X X . . |
$$ . . . . . . . . . |[/go]


Problem 3 (9 points)
Click Here To Show Diagram Code
[go]$$Bc
$$ | . . . . . . . . . . .
$$ | . . . . X X X X X . .
$$ | . . X X O . . . . X .
$$ | . X . O . . O . O X .
$$ | . X O O . O . . O X .
$$ | . . X . . . . . . X .
$$ ----------------------[/go]


Have fun! :salute:

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Post #2 Posted: Sat Mar 25, 2017 4:04 am 
Judan
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Click Here To Show Diagram Code
[go]$$B
$$ -------------------
$$ | . . . . . O X . .
$$ | . . . O O O X . .
$$ | . O O X X X X . .
$$ | . X X , . . . . .
$$ | . . . . . . . . .[/go]
:study: Feeling:
Click Here To Show Diagram Code
[go]$$B (a), (b) miai kill
$$ -------------------
$$ | . . . . . O X . .
$$ | . 1 b O O O X . .
$$ | a O O X X X X . .
$$ | . X X , . . . . .
$$ | . . . . . . . . .[/go]
Click Here To Show Diagram Code
[go]$$B
$$ -------------------
$$ | . . . . . O X . .
$$ | 2 1 3 O O O X . .
$$ | 4 O O X X X X . .
$$ | 5 X X , . . . . .
$$ | . . . . . . . . .[/go]

Click Here To Show Diagram Code
[go]$$B
$$ -------------------
$$ . . . . . O . O . |
$$ . X X . . . O X . |
$$ . X O O . . O X . |
$$ . X O . X O X . . |
$$ . X O O O O X . . |
$$ . . X X X X X . . |
$$ . . . . . . . . . |[/go]
:study: Feeling:
Click Here To Show Diagram Code
[go]$$B
$$ -------------------
$$ . . . . . O . O . |
$$ . X X . 1 . O X . |
$$ . X O O . . O X . |
$$ . X O . X O X . . |
$$ . X O O O O X . . |
$$ . . X X X X X . . |
$$ . . . . . . . . . |[/go]

Click Here To Show Diagram Code
[go]$$B
$$ | . . . . . . . . . . .
$$ | . . . . X X X X X . .
$$ | . . X X O . . . . X .
$$ | . X . O . . O . O X .
$$ | . X O O . O . . O X .
$$ | . . X . . . . . . X .
$$ -----------------------[/go]
:study: Feeling:
Click Here To Show Diagram Code
[go]$$B
$$ | . . . . . . . . . . .
$$ | . . . . X X X X X . .
$$ | . . X X O . . . . X .
$$ | . X . O . . O . O X .
$$ | . X O O . O . 1 O X .
$$ | . . X . . . . . . X .
$$ -----------------------[/go]

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 Post subject: Re: L19 Go Problem Championship: Round 6
Post #3 Posted: Fri Mar 31, 2017 12:00 am 
Lives with ko

Posts: 135
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Rank: Chinese 3d
KGS: 3d
DGS: 3d
OGS: 3d
1.
Click Here To Show Diagram Code
[go]$$Bc
$$ ------------------
$$ | . . . . . O X . .
$$ | . 1 2 O O O X . .
$$ | 3 O O X X X X . .
$$ | . X X , . . . . .
$$ | . . . . . . . . .[/go]


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


2.

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


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


B3 fails (seki)
Click Here To Show Diagram Code
[go]$$Bc
$$ -----------------
$$ . . . 5 6 O . O . |
$$ . X X 2 1 . O X . |
$$ . X O O 3 4 O X . |
$$ . X O . X O X . . |
$$ . X O O O O X . . |
$$ . . X X X X X . . |
$$ . . . . . . . . . |[/go]


B3 fails
Click Here To Show Diagram Code
[go]$$Bc
$$ -----------------
$$ . . . 5 . O . O . |
$$ . X X 2 1 6 O X . |
$$ . X O O 4 3 O X . |
$$ . X O . X O X . . |
$$ . X O O O O X . . |
$$ . . X X X X X . . |
$$ . . . . . . . . . |[/go]


3.
Intuitions (a-g):
Click Here To Show Diagram Code
[go]$$Bc
$$ | . . . . . . . . . . .
$$ | . . . . X X X X X . .
$$ | . . X X O d . e . X .
$$ | . X . O g . O . O X .
$$ | . X O O . O . b O X .
$$ | . . X . f . a . c X .
$$ ----------------------[/go]


Need to study more :)

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 Post subject: Re: L19 Go Problem Championship: Round 6
Post #4 Posted: Fri Mar 31, 2017 1:03 pm 
Judan

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@gamesorry:
Correct on the first two problems. I'll release solutions this evening (8~10 hours from now?).

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 Post subject: Re: L19 Go Problem Championship: Round 6
Post #5 Posted: Sat Apr 01, 2017 10:49 am 
Tengen

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


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


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


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


I feel like I must be missing some complication?

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

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 Post subject: Re: L19 Go Problem Championship: Round 6
Post #6 Posted: Sat Apr 01, 2017 12:36 pm 
Judan

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@ hyperpape

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


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

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 Post subject: Re: L19 Go Problem Championship: Round 6
Post #7 Posted: Sun Apr 02, 2017 10:00 pm 
Judan

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Thanks for helping out, Bill. It's been a busier weekend than expected, so I was a little bit delayed :-)

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 Post subject: Re: L19 Go Problem Championship: Round 6
Post #8 Posted: Sun Apr 02, 2017 10:00 pm 
Judan

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Solutions and updated leader board are given below.

Problem 1


Problem 2


Problem 3


Leaderboard
  1. gamesorry - 91
  2. Schachus - 52
  3. Shaddy - 49
  4. EdLee - 43
  5. dfan - 34
  6. hyperpape - 19
  7. Lanrose - 16
  8. jeromie - 13
  9. mongus - 10

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 Post subject: Re: L19 Go Problem Championship: Round 6
Post #9 Posted: Mon Apr 03, 2017 1:15 am 
Lives with ko

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@Kirby
Thank you for waiting, sorry that I was busy this weekend and didn't get to think over the third one (the 2nd intuition was correct, so my neural network needs a little tuning ;-))


This post by gamesorry was liked by: Kirby
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 Post subject: Re: L19 Go Problem Championship: Round 6
Post #10 Posted: Mon Apr 03, 2017 10:26 am 
Judan

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gamesorry wrote:
@Kirby
Thank you for waiting, sorry that I was busy this weekend and didn't get to think over the third one (the 2nd intuition was correct, so my neural network needs a little tuning ;-))


I totally understand :-)

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