L19 Go Problem Championship: Round 15

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Kirby
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L19 Go Problem Championship: Round 15

Post by Kirby »

Welcome to Round 15 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]$$Bc
$$ ----------------
$$ | . O O O X . . .
$$ | X O . . X X O .
$$ | . X X X O O O .
$$ | . O O O . . . .
$$ | . . . . . . . .[/go]


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


Have fun! :salute:
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EdLee
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Post by EdLee »

Click Here To Show Diagram Code
[go]$$B
$$ -----------------
$$ | . O O O X . . .
$$ | X O 1 . X X O .
$$ | . X X X O O O .
$$ | . O O O . . . .
$$ | . . . . . . . .[/go]
:study:
Click Here To Show Diagram Code
[go]$$B
$$ ----------------------
$$ . X X X X O . . . X . |
$$ . X O O O O . . O X . |
$$ . X O . . . . O O X . |
$$ . X X O O . X O . X . |
$$ . . . X X X . X X . . |
$$ . . . . . . . . . . . |[/go]
Click Here To Show Diagram Code
[go]$$B
$$ ----------------------
$$ . X X X X O . . . X . |
$$ . X O O O O . . O X . |
$$ . X O . . . . O O X . |
$$ . X X O O . X O . X . |
$$ . . . X X X . X X . . |
$$ . . . . . . . . . . . |[/go]
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Shaddy
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Re: L19 Go Problem Championship: Round 15

Post by Shaddy »

Problem 1 (3 points)
Click Here To Show Diagram Code
[go]$$Bc
$$ ----------------
$$ | . O O O X . . .
$$ | X O 1 . X X O .
$$ | . X X X O O O .
$$ | . O O O . . . .
$$ | . . . . . . . .[/go]


Problem 2 (6 points)
Click Here To Show Diagram Code
[go]$$Bc
$$ ----------------------
$$ . X X X X O . 3 4 X . |
$$ . X O O O O 5 . O X . |
$$ . X O . 2 1 6 O O X . |
$$ . X X O O 7 X O . X . |
$$ . . . X X X . X X . . |
$$ . . . . . . . . . . . |[/go]
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Shaddy
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Re: L19 Go Problem Championship: Round 15

Post by Shaddy »

Problem 3 (9 points)
Click Here To Show Diagram Code
[go]$$Bc
$$ | . . . . . .
$$ | X X X . X .
$$ | . . . X . .
$$ | O . O X . .
$$ | . 2 . 3 X .
$$ | 1 O . O X .
$$ | 4 5 O X X .
$$ ------------[/go]
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Kirby
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Re: L19 Go Problem Championship: Round 15

Post by Kirby »

@Shaddy:
Problem 1: Looks good.

Problem 2: Did you consider this variation?
Click Here To Show Diagram Code
[go]$$Bc
$$ ----------------------
$$ . X X X X O . 3 . X . |
$$ . X O O O O . . O X . |
$$ . X O . 2 1 . O O X . |
$$ . X X O O 4 X O . X . |
$$ . . . X X X . X X . . |
$$ . . . . . . . . . . . |[/go]


Problem 3: Looks good.
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Kirby
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Re: L19 Go Problem Championship: Round 15

Post by Kirby »

@EdLee:
Problem 1 looks good.
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gamesorry
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Re: L19 Go Problem Championship: Round 15

Post by gamesorry »

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

2.
After B6, white cannot play in a/b:
Click Here To Show Diagram Code
[go]$$Bc
$$ ----------------------
$$ . X X X X O a 1 2 X . |
$$ . X O O O O 5 b O X . |
$$ . X O . 4 3 6 O O X . |
$$ . X X O O 7 X O . X . |
$$ . . . X X X . X X . . |
$$ . . . . . . . . . . . |[/go]


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


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

Variation: W fails (a and b miai)
Click Here To Show Diagram Code
[go]$$Bc
$$ | . . . . . .
$$ | X X X . X .
$$ | 7 6 . X . .
$$ | O b O X . .
$$ | a . 2 3 X .
$$ | 1 O 4 O X .
$$ | 5 . O X X .
$$ ------------[/go]
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Kirby
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Re: L19 Go Problem Championship: Round 15

Post by Kirby »

Studying some stuff this week - deadline for this round extended by a week.
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Monkey
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Re: L19 Go Problem Championship: Round 15

Post by Monkey »

Kirby wrote:Welcome to Round 15 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]$$Bc
$$ ----------------
$$ | . O O O X . . .
$$ | X O 1 . X X O .
$$ | . X X X O O O .
$$ | . O O O . . . .
$$ | . . . . . . . .[/go]


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


Problem 3 (9 points)
[go]$$Bc

still thinking of solution for this last one


Have fun! :salute:
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Monkey
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Re: L19 Go Problem Championship: Round 15

Post by Monkey »

Problem 3 (9 points)
Click Here To Show Diagram Code
[go]$$Bc
$$ | . . . . . .
$$ | X X X . X .
$$ | . 2 5 X . .
$$ | O 1 O X . .
$$ | . 4 3 . X .
$$ | . O . O X .
$$ | . . O X X .
$$ ------------[/go]

:w6: connects at :b1:
Click Here To Show Diagram Code
[go]$$Bc
$$ | . . . . . .
$$ | X X X . X .
$$ | . O X X . .
$$ | O O O X . .
$$ | . O X 3 X .
$$ | 1 O 4 O X .
$$ | 2 5 O X X .
$$ ------------[/go]

ko
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Kirby
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Re: L19 Go Problem Championship: Round 15

Post by Kirby »

Solutions and updated leader board are given below.

Problem 1


Problem 2


Problem 3


Leaderboard
  1. gamesorry - 175
  2. EdLee - 112
  3. dfan - 104
  4. Shaddy - 98
  5. Schachus - 77
  6. hyperpape - 39
  7. jeromie - 31
  8. mongus - 19
  9. Monkey - 18
  10. Lanrose - 16
  11. ez4u - 9
  12. fractic - 6
  13. Marcus - 5
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