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L19 Go Problem Championship: Round 15

https://lifein19x19.com/viewtopic.php?t=14293

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L19 Go Problem Championship: Round 15

Posted: Mon Jun 05, 2017 9:55 pm
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:

Posted: Tue Jun 06, 2017 3:05 am
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]

Re: L19 Go Problem Championship: Round 15

Posted: Tue Jun 06, 2017 6:49 am
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]

Re: L19 Go Problem Championship: Round 15

Posted: Tue Jun 06, 2017 7:13 am
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]

Re: L19 Go Problem Championship: Round 15

Posted: Tue Jun 06, 2017 8:50 am
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.

Re: L19 Go Problem Championship: Round 15

Posted: Tue Jun 06, 2017 8:50 am
by Kirby
@EdLee:
Problem 1 looks good.

Re: L19 Go Problem Championship: Round 15

Posted: Sun Jun 11, 2017 11:28 pm
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]

Re: L19 Go Problem Championship: Round 15

Posted: Mon Jun 12, 2017 8:27 pm
by Kirby
Studying some stuff this week - deadline for this round extended by a week.

Re: L19 Go Problem Championship: Round 15

Posted: Wed Jun 14, 2017 4:14 pm
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 . . |
$$ . . . . . . . . . . . |[/go]
Problem 3 (9 points)
Click Here To Show Diagram Code
[go]$$Bc

still thinking of solution for this last one


Have fun! :salute:[/quote][/hide][/go]

Re: L19 Go Problem Championship: Round 15

Posted: Sat Jun 17, 2017 7:37 am
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

Re: L19 Go Problem Championship: Round 15

Posted: Mon Jun 19, 2017 8:02 pm
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
All times are UTC-07:00
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