[go]$$Bc
$$ --------------
$$ | X O . O X . .
$$ | X . X X X O .
$$ | . . O O O O .
$$ | O O . , . . .
$$ | . . . . . . .[/go]
Problem 2 (6 points)
$$Bc
$$ ---------------------------
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . O X . . . |
$$ | . O . O O . . O X O . . . |
$$ | . . O X . . , . X X X . . |
$$ | . O X . X . . . . . . . . |
$$ | . O X . . . . . . . . . . |
$$ | . X Q Q . . , . . , O . . |
$$ | . X X Q . . . . . X X O . |
$$ | . X O X X . . . . . . O . |
$$ | . O O X . . , X O O . . . |
$$ | . . O X O X . X X X O . . |
$$ | . . O O X . X . . . O . . |
$$ | . . . . . X . . . . . . . |
$$ ---------------------------
[go]$$Bc
$$ ---------------------------
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . O X . . . |
$$ | . O . O O . . O X O . . . |
$$ | . . O X . . , . X X X . . |
$$ | . O X . X . . . . . . . . |
$$ | . O X . . . . . . . . . . |
$$ | . X Q Q . . , . . , O . . |
$$ | . X X Q . . . . . X X O . |
$$ | . X O X X . . . . . . O . |
$$ | . O O X . . , X O O . . . |
$$ | . . O X O X . X X X O . . |
$$ | . . O O X . X . . . O . . |
$$ | . . . . . X . . . . . . . |
$$ ---------------------------[/go]
Problem 3 (9 points)
$$Bc
$$ | . . . . . . . . . . .
$$ | . . X X X X . . . . .
$$ | . X . O O . X . . . .
$$ | . X O X O . O X . , .
$$ | . X . . . . . X . . .
$$ | . X O . . O O X . X .
$$ | . O . . . . . . . . .
$$ ----------------------
[go]$$Bc
$$ | . . . . . . . . . . .
$$ | . . X X X X . . . . .
$$ | . X . O O . X . . . .
$$ | . X O X O . O X . , .
$$ | . X . . . . . X . . .
$$ | . X O . . O O X . X .
$$ | . O . . . . . . . . .
$$ ----------------------[/go]
Have fun!
Posted: Sun May 07, 2017 11:00 pm
by EdLee
$$B Life
$$ -------------------
$$ | X O . O X . . . .
$$ | X 1 X X X O . O .
$$ | . . O O O O . . .
$$ | O O O , . . . . .
$$ | . . . . . . . . .
[go]$$B Life
$$ -------------------
$$ | X O . O X . . . .
$$ | X 1 X X X O . O .
$$ | . . O O O O . . .
$$ | O O O , . . . . .
$$ | . . . . . . . . .[/go]
$$B
$$ ------------------
$$ | X O 1 O X . . . .
$$ | X 2 X X X O . O .
$$ | . 3 O O O O . . .
$$ | O O O , . . . . .
$$ | . . . . . . . . .
[go]$$B
$$ ------------------
$$ | X O 1 O X . . . .
$$ | X 2 X X X O . O .
$$ | . 3 O O O O . . .
$$ | O O O , . . . . .
$$ | . . . . . . . . .[/go]
$$B Connect-and-die
$$ ------------------
$$ | X . X . X . . . .
$$ | X 4 X X X O . O .
$$ | . X O O O O . . .
$$ | O O O , . . . . .
$$ | . . . . . . . . .
[go]$$B Connect-and-die
$$ ------------------
$$ | X . X . X . . . .
$$ | X 4 X X X O . O .
$$ | . X O O O O . . .
$$ | O O O , . . . . .
$$ | . . . . . . . . .[/go]
$$B
$$ ------------------
$$ | X 5 X . X . . . .
$$ | X . X X X O . O .
$$ | 6 X O O O O . . .
$$ | O O O , . . . . .
$$ | . . . . . . . . .
[go]$$B
$$ ------------------
$$ | X 5 X . X . . . .
$$ | X . X X X O . O .
$$ | 6 X O O O O . . .
$$ | O O O , . . . . .
$$ | . . . . . . . . .[/go]
$$B
$$ | . . . . . . . . . . .
$$ | . . X X X X . . . . .
$$ | . X . O O . X . . . .
$$ | . X O X O . O X . , .
$$ | . X . 1 . . . X . . .
$$ | . X O . . O O X . X .
$$ | . O . . . . . . . . .
$$ -----------------------
[go]$$B
$$ | . . . . . . . . . . .
$$ | . . X X X X . . . . .
$$ | . X . O O . X . . . .
$$ | . X O X O . O X . , .
$$ | . X . 1 . . . X . . .
$$ | . X O . . O O X . X .
$$ | . O . . . . . . . . .
$$ -----------------------[/go]
Re: L19 Go Problem Championship: Round 12
Posted: Mon May 08, 2017 2:20 am
by fractic
I'm not sure you can even capture the marked stones in problem 2.
$$Bc
$$ ---------------------------
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . O X . . . |
$$ | . O . O O . . O X O . . . |
$$ | . . O X . . , . X X X . . |
$$ | . O X 8 X . . . . . . . . |
$$ | . O X . 2 3 . . . . . . . |
$$ | . X Q Q 1 6 7 . . , O . . |
$$ | . X X Q 4 5 . . . X X O . |
$$ | . X O X X . . . . . . O . |
$$ | . O O X . . , X O O . . . |
$$ | . . O X O X . X X X O . . |
$$ | . . O O X . X . . . O . . |
$$ | . . . . . X . . . . . . . |
$$ ---------------------------
[go]$$Bc
$$ ---------------------------
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . O X . . . |
$$ | . O . O O . . O X O . . . |
$$ | . . O X . . , . X X X . . |
$$ | . O X 8 X . . . . . . . . |
$$ | . O X . 2 3 . . . . . . . |
$$ | . X Q Q 1 6 7 . . , O . . |
$$ | . X X Q 4 5 . . . X X O . |
$$ | . X O X X . . . . . . O . |
$$ | . O O X . . , X O O . . . |
$$ | . . O X O X . X X X O . . |
$$ | . . O O X . X . . . O . . |
$$ | . . . . . X . . . . . . . |
$$ ---------------------------[/go]
$$Bc
$$ ---------------------------
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . O X . . . |
$$ | . O . O O . . O X O . . . |
$$ | . . O X . . , . X X X . . |
$$ | . O X . X . . . . . . . . |
$$ | . O X . 2 3 . . . . . . . |
$$ | . X Q Q 1 5 . . . , O . . |
$$ | . X X Q 4 8 . . . X X O . |
$$ | . X O X X 6 . . . . . O . |
$$ | . O O X 7 . , X O O . . . |
$$ | . . O X O X . X X X O . . |
$$ | . . O O X . X . . . O . . |
$$ | . . . . . X . . . . . . . |
$$ ---------------------------
[go]$$Bc
$$ ---------------------------
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . O X . . . |
$$ | . O . O O . . O X O . . . |
$$ | . . O X . . , . X X X . . |
$$ | . O X . X . . . . . . . . |
$$ | . O X . 2 3 . . . . . . . |
$$ | . X Q Q 1 5 . . . , O . . |
$$ | . X X Q 4 8 . . . X X O . |
$$ | . X O X X 6 . . . . . O . |
$$ | . O O X 7 . , X O O . . . |
$$ | . . O X O X . X X X O . . |
$$ | . . O O X . X . . . O . . |
$$ | . . . . . X . . . . . . . |
$$ ---------------------------[/go]
$$Bc
$$ ---------------------------
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . O X . . . |
$$ | . O . O O . . O X O . . . |
$$ | . . O X . . , . X X X . . |
$$ | . O X 5 X 7 . . . . . . . |
$$ | . O X 4 2 6 8 . . . . . . |
$$ | . X Q Q 1 . . . . , O . . |
$$ | . X X Q 3 . . . . X X O . |
$$ | . X O X X . . . . . . O . |
$$ | . O O X 7 . , X O O . . . |
$$ | . . O X O X . X X X O . . |
$$ | . . O O X . X . . . O . . |
$$ | . . . . . X . . . . . . . |
$$ ---------------------------
[go]$$Bc
$$ ---------------------------
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . O X . . . |
$$ | . O . O O . . O X O . . . |
$$ | . . O X . . , . X X X . . |
$$ | . O X 5 X 7 . . . . . . . |
$$ | . O X 4 2 6 8 . . . . . . |
$$ | . X Q Q 1 . . . . , O . . |
$$ | . X X Q 3 . . . . X X O . |
$$ | . X O X X . . . . . . O . |
$$ | . O O X 7 . , X O O . . . |
$$ | . . O X O X . X X X O . . |
$$ | . . O O X . X . . . O . . |
$$ | . . . . . X . . . . . . . |
$$ ---------------------------[/go]
$$Bc
$$ ---------------------------
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . O X . . . |
$$ | . O . O O . . O X O . . . |
$$ | . . O X . . , . X X X . . |
$$ | . O X 3 X . . . . . . . . |
$$ | . O X . 2 4 . . . . . . . |
$$ | . X Q Q . . . . . , O . . |
$$ | . X X Q 1 . . . . X X O . |
$$ | . X O X X . . . . . . O . |
$$ | . O O X . . , X O O . . . |
$$ | . . O X O X . X X X O . . |
$$ | . . O O X . X . . . O . . |
$$ | . . . . . X . . . . . . . |
$$ ---------------------------
[go]$$Bc
$$ ---------------------------
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . O X . . . |
$$ | . O . O O . . O X O . . . |
$$ | . . O X . . , . X X X . . |
$$ | . O X 3 X . . . . . . . . |
$$ | . O X . 2 4 . . . . . . . |
$$ | . X Q Q . . . . . , O . . |
$$ | . X X Q 1 . . . . X X O . |
$$ | . X O X X . . . . . . O . |
$$ | . O O X . . , X O O . . . |
$$ | . . O X O X . X X X O . . |
$$ | . . O O X . X . . . O . . |
$$ | . . . . . X . . . . . . . |
$$ ---------------------------[/go]
Re: L19 Go Problem Championship: Round 12
Posted: Mon May 08, 2017 4:09 am
by Cassandra
@ fractic:
$$Bc
$$ ---------------------------
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . O X . . . |
$$ | . O . O O . . O X O . . . |
$$ | . . O X . . , . X X X . . |
$$ | . O X 3 X . . . . . . . . |
$$ | . O X . 2 . . . . . . . . |
$$ | . X Q Q 1 . . . . , O . . |
$$ | . X X Q . . . . . X X O . |
$$ | . X O X X . . . . . . O . |
$$ | . O O X . . , X O O . . . |
$$ | . . O X O X . X X X O . . |
$$ | . . O O X . X . . . O . . |
$$ | . . . . . X . . . . . . . |
$$ ---------------------------
[go]$$Bc
$$ ---------------------------
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . O X . . . |
$$ | . O . O O . . O X O . . . |
$$ | . . O X . . , . X X X . . |
$$ | . O X 3 X . . . . . . . . |
$$ | . O X . 2 . . . . . . . . |
$$ | . X Q Q 1 . . . . , O . . |
$$ | . X X Q . . . . . X X O . |
$$ | . X O X X . . . . . . O . |
$$ | . O O X . . , X O O . . . |
$$ | . . O X O X . X X X O . . |
$$ | . . O O X . X . . . O . . |
$$ | . . . . . X . . . . . . . |
$$ ---------------------------[/go]
Did you ever consider Black's resistance with 3 here ?
The solution sequence will become longish
Re: L19 Go Problem Championship: Round 12
Posted: Mon May 08, 2017 4:51 am
by fractic
@ Cassandra
I did consider that move. I just didn't read out the ladder correctly.
Re: L19 Go Problem Championship: Round 12
Posted: Mon May 08, 2017 7:08 am
by Kirby
@EdLee:
If white resists?
$$Bc
$$ ---------------------------
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . O X . . . |
$$ | . O . O O . . O X O . . . |
$$ | . . O X . . , . X X X . . |
$$ | . O X . X . . . . . . . . |
$$ | . O X . 2 . . . . . . . . |
$$ | . X O O 1 . . . . , O . . |
$$ | . X X O . . . . . X X O . |
$$ | . X O X X . . . . . . O . |
$$ | . O O X . . , X O O . . . |
$$ | . . O X O X . X X X O . . |
$$ | . . O O X . X . . . O . . |
$$ | . . . . . X . . . . . . . |
$$ ---------------------------
[go]$$Bc
$$ ---------------------------
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . O X . . . |
$$ | . O . O O . . O X O . . . |
$$ | . . O X . . , . X X X . . |
$$ | . O X . X . . . . . . . . |
$$ | . O X . 2 . . . . . . . . |
$$ | . X O O 1 . . . . , O . . |
$$ | . X X O . . . . . X X O . |
$$ | . X O X X . . . . . . O . |
$$ | . O O X . . , X O O . . . |
$$ | . . O X O X . X X X O . . |
$$ | . . O O X . X . . . O . . |
$$ | . . . . . X . . . . . . . |
$$ ---------------------------[/go]
Re: L19 Go Problem Championship: Round 12
Posted: Mon May 08, 2017 7:32 am
by Schachus
After some break, I decided to have a look at this again:
Kirby wrote:Welcome to Round 12 of the L19 Go Problem Championship.
All problems are black to play. As usual, provide your solutions either via hide tags, or direct private message to me.
Problem 1 (3 points)
$$Bc
$$ --------------
$$ | X O . O X . .
$$ | X . X X X O .
$$ | . . O O O O .
$$ | O O . , . . .
$$ | . . . . . . .
[go]$$Bc
$$ --------------
$$ | X O . O X . .
$$ | X 1 X X X O .
$$ | . . O O O O .
$$ | O O . , . . .
$$ | . . . . . . .[/go]
nothing much to say...
Problem 2 (6 points)
$$Bc
$$ ---------------------------
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . O X . . . |
$$ | . O . O O . . O X O . . . |
$$ | . . O X . . , . X X X . . |
$$ | . O X . X . . . . . . . . |
$$ | . O X . . . . . . . . . . |
$$ | . X Q Q . . , . . , O . . |
$$ | . X X Q . . . . . X X O . |
$$ | . X O X X . . . . . . O . |
$$ | . O O X . . , X O O . . . |
$$ | . . O X O X . X X X O . . |
$$ | . . O O X . X . . . O . . |
$$ | . . . . . X . . . . . . . |
$$ ---------------------------
[go]$$Bc
$$ ---------------------------
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . O X . . . |
$$ | . O . O O . . O X O . . . |
$$ | . . O X . . , . X X X . . |
$$ | . O X . X . . . . . . . . |
$$ | . O X . . . . . . . . . . |
$$ | . X Q Q . . , . . , O . . |
$$ | . X X Q . . . . . X X O . |
$$ | . X O X X . . . . . . O . |
$$ | . O O X . . , X O O . . . |
$$ | . . O X O X . X X X O . . |
$$ | . . O O X . X . . . O . . |
$$ | . . . . . X . . . . . . . |
$$ ---------------------------[/go]
seems like a one way street:
$$Bc
$$ ---------------------------
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . O X . . . |
$$ | . O . O O . . O X O . . . |
$$ | . . O X . . , . X X X . . |
$$ | . O X 3 X . . . . . . . . |
$$ | . O X 7 2 . . . . . . . . |
$$ | . X Q Q 1 6 9 . . , O . . |
$$ | . X X Q 4 5 . . . X X O . |
$$ | . X O X X . . . . . . O . |
$$ | . O O X . . , X O O . . . |
$$ | . . O X O X . X X X O . . |
$$ | . . O O X . X . . . O . . |
$$ | . . . . . X . . . . . . . |
$$ ---------------------------
[go]$$Bc
$$ ---------------------------
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . O X . . . |
$$ | . O . O O . . O X O . . . |
$$ | . . O X . . , . X X X . . |
$$ | . O X 3 X . . . . . . . . |
$$ | . O X 7 2 . . . . . . . . |
$$ | . X Q Q 1 6 9 . . , O . . |
$$ | . X X Q 4 5 . . . X X O . |
$$ | . X O X X . . . . . . O . |
$$ | . O O X . . , X O O . . . |
$$ | . . O X O X . X X X O . . |
$$ | . . O O X . X . . . O . . |
$$ | . . . . . X . . . . . . . |
$$ ---------------------------[/go]
(8 connects at 1) and the ladder works:
$$Wc
$$ ---------------------------
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . O X . . . |
$$ | . O . O O . . O X O . . . |
$$ | . . O X . . 6 8 X X X . . |
$$ | . O X X X 2 5 7 9 . . . . |
$$ | . O X X O 1 3 4 . . . . . |
$$ | . X O O O O X . . , O . . |
$$ | . X X O O X . . . X X O . |
$$ | . X O X X . . . . . . O . |
$$ | . O O X . . , X O O . . . |
$$ | . . O X O X . X X X O . . |
$$ | . . O O X . X . . . O . . |
$$ | . . . . . X . . . . . . . |
$$ ---------------------------
[go]$$Wc
$$ ---------------------------
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . O X . . . |
$$ | . O . O O . . O X O . . . |
$$ | . . O X . . 6 8 X X X . . |
$$ | . O X X X 2 5 7 9 . . . . |
$$ | . O X X O 1 3 4 . . . . . |
$$ | . X O O O O X . . , O . . |
$$ | . X X O O X . . . X X O . |
$$ | . X O X X . . . . . . O . |
$$ | . O O X . . , X O O . . . |
$$ | . . O X O X . X X X O . . |
$$ | . . O O X . X . . . O . . |
$$ | . . . . . X . . . . . . . |
$$ ---------------------------[/go]
and another continuation(how do 1 get more than 9 moves in one diagram??):
$$Bc
$$ ---------------------------
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . O X . . . |
$$ | . O . O O . . O X O . . . |
$$ | . . O X . . X X X X X . . |
$$ | . O X X X X O O O 2 3 . . |
$$ | . O X X O O O X 1 4 5 . . |
$$ | . X O O O O X 9 8 6 O 7 . |
$$ | . X X O O X . . . X X O . |
$$ | . X O X X . . . . . . O . |
$$ | . O O X . . , X O O . . . |
$$ | . . O X O X . X X X O . . |
$$ | . . O O X . X . . . O . . |
$$ | . . . . . X . . . . . . . |
$$ ---------------------------
[go]$$Bc
$$ ---------------------------
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . O X . . . |
$$ | . O . O O . . O X O . . . |
$$ | . . O X . . X X X X X . . |
$$ | . O X X X X O O O 2 3 . . |
$$ | . O X X O O O X 1 4 5 . . |
$$ | . X O O O O X 9 8 6 O 7 . |
$$ | . X X O O X . . . X X O . |
$$ | . X O X X . . . . . . O . |
$$ | . O O X . . , X O O . . . |
$$ | . . O X O X . X X X O . . |
$$ | . . O O X . X . . . O . . |
$$ | . . . . . X . . . . . . . |
$$ ---------------------------[/go]
there is 3 more moves, but I think you can see the ladder works from here
Re: L19 Go Problem Championship: Round 12
Posted: Mon May 08, 2017 9:16 am
by Kirby
@Schachus
You've got it!
Re: L19 Go Problem Championship: Round 12
Posted: Mon May 08, 2017 9:47 am
by hyperpape
Problem 1
$$Bc
$$ --------------
$$ | X O . O X . .
$$ | X 1 X X X O .
$$ | . . O O O O .
$$ | O O . , . . .
$$ | . . . . . . .
[go]$$Bc
$$ --------------
$$ | X O . O X . .
$$ | X 1 X X X O .
$$ | . . O O O O .
$$ | O O . , . . .
$$ | . . . . . . .[/go]
Problem 2
This is a bit harder.
$$Bc
$$ ---------------------------
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . O X . . . |
$$ | . O . O O . . O X O . . . |
$$ | . . O X . . , . X X X . . |
$$ | . O X . X . . . . . . . . |
$$ | . O X . 2 3 . . . . . . . |
$$ | . X Q Q 1 5 , . . , O . . |
$$ | . X X Q 4 . . . . X X O . |
$$ | . X O X X 6 . . . . . O . |
$$ | . O O X 7 8 , X O O . . . |
$$ | . . O X O X . X X X O . . |
$$ | . . O O X . X . . . O . . |
$$ | . . . . . X . . . . . . . |
$$ ---------------------------
[go]$$Bc
$$ ---------------------------
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . O X . . . |
$$ | . O . O O . . O X O . . . |
$$ | . . O X . . , . X X X . . |
$$ | . O X . X . . . . . . . . |
$$ | . O X . 2 3 . . . . . . . |
$$ | . X Q Q 1 5 , . . , O . . |
$$ | . X X Q 4 . . . . X X O . |
$$ | . X O X X 6 . . . . . O . |
$$ | . O O X 7 8 , X O O . . . |
$$ | . . O X O X . X X X O . . |
$$ | . . O O X . X . . . O . . |
$$ | . . . . . X . . . . . . . |
$$ ---------------------------[/go]
$$Wc Shenanigans!
$$ ---------------------------
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . O X . . . |
$$ | . O . O O . . O X O . . . |
$$ | . . O X . . , . X X X . . |
$$ | . O X . X 2 . . . . . . . |
$$ | . O X . W X . . . . . . . |
$$ | . X Q Q X X , . . 7 O . . |
$$ | . X X Q W 1 . . 5 X X O . |
$$ | . X O X X W . 3 4 6 . O . |
$$ | . O O X X W , X O O 8 . . |
$$ | . . O X X X . X X X O . . |
$$ | . . O O X . X . . . O . . |
$$ | . . . . . X . . . . . . . |
$$ ---------------------------
[go]$$Wc Shenanigans!
$$ ---------------------------
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . O X . . . |
$$ | . O . O O . . O X O . . . |
$$ | . . O X . . , . X X X . . |
$$ | . O X . X 2 . . . . . . . |
$$ | . O X . W X . . . . . . . |
$$ | . X Q Q X X , . . 7 O . . |
$$ | . X X Q W 1 . . 5 X X O . |
$$ | . X O X X W . 3 4 6 . O . |
$$ | . O O X X W , X O O 8 . . |
$$ | . . O X X X . X X X O . . |
$$ | . . O O X . X . . . O . . |
$$ | . . . . . X . . . . . . . |
$$ ---------------------------[/go]
$$Bc hopefully good enough for B?
$$ ---------------------------
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . O X . . . |
$$ | . O . O O . . O X O . . . |
$$ | . . O X . . , . X X X . . |
$$ | . O X . X . . . . . . . . |
$$ | . O X 5 2 3 . . . . . . . |
$$ | . X Q Q 1 . , . . , O . . |
$$ | . X X Q 4 6 . 7 . X X O . |
$$ | . X O X X . . . . . . O . |
$$ | . O O X . . , X O O . . . |
$$ | . . O X O X . X X X O . . |
$$ | . . O O X . X . . . O . . |
$$ | . . . . . X . . . . . . . |
$$ ---------------------------
[go]$$Bc hopefully good enough for B?
$$ ---------------------------
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . O X . . . |
$$ | . O . O O . . O X O . . . |
$$ | . . O X . . , . X X X . . |
$$ | . O X . X . . . . . . . . |
$$ | . O X 5 2 3 . . . . . . . |
$$ | . X Q Q 1 . , . . , O . . |
$$ | . X X Q 4 6 . 7 . X X O . |
$$ | . X O X X . . . . . . O . |
$$ | . O O X . . , X O O . . . |
$$ | . . O X O X . X X X O . . |
$$ | . . O O X . X . . . O . . |
$$ | . . . . . X . . . . . . . |
$$ ---------------------------[/go]
Re: L19 Go Problem Championship: Round 12
Posted: Mon May 08, 2017 10:07 am
by gamesorry
1.
$$Bc
$$ --------------
$$ | X O . O X . .
$$ | X 1 X X X O .
$$ | . . O O O O .
$$ | O O . , . . .
$$ | . . . . . . .
[go]$$Bc
$$ --------------
$$ | X O . O X . .
$$ | X 1 X X X O .
$$ | . . O O O O .
$$ | O O . , . . .
$$ | . . . . . . .[/go]
2.
B3 is the key move
$$Bc
$$ ---------------------------
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . O X . . . |
$$ | . O . O O . . O X O . . . |
$$ | . . O X . . , . X X X . . |
$$ | . O X 3 X . . . . . . . . |
$$ | . O X . 2 . . . . . . . . |
$$ | . X Q Q 1 6 , . . , O . . |
$$ | . X X Q 4 5 . . . X X O . |
$$ | . X O X X . . . . . . O . |
$$ | . O O X . . , X O O . . . |
$$ | . . O X O X . X X X O . . |
$$ | . . O O X . X . . . O . . |
$$ | . . . . . X . . . . . . . |
$$ ---------------------------
[go]$$Bc
$$ ---------------------------
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . O X . . . |
$$ | . O . O O . . O X O . . . |
$$ | . . O X . . , . X X X . . |
$$ | . O X 3 X . . . . . . . . |
$$ | . O X . 2 . . . . . . . . |
$$ | . X Q Q 1 6 , . . , O . . |
$$ | . X X Q 4 5 . . . X X O . |
$$ | . X O X X . . . . . . O . |
$$ | . O O X . . , X O O . . . |
$$ | . . O X O X . X X X O . . |
$$ | . . O O X . X . . . O . . |
$$ | . . . . . X . . . . . . . |
$$ ---------------------------[/go]
$$Bc
$$ ---------------------------
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . O X . . . |
$$ | . O . O O . . O X O . . . |
$$ | . . O X . . 9 a X X X . . |
$$ | . O X X X 5 8 0 b d e . . |
$$ | . O X 1 O 4 6 7 c f g . . |
$$ | . X Q Q 2 O 3 k j h O i . |
$$ | . X X Q O X o n l X X O . |
$$ | . X O X X . . . m . . O . |
$$ | . O O X . . , X O O . . . |
$$ | . . O X O X . X X X O . . |
$$ | . . O O X . X . . . O . . |
$$ | . . . . . X . . . . . . . |
$$ ---------------------------
[go]$$Bc
$$ ---------------------------
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . O X . . . |
$$ | . O . O O . . O X O . . . |
$$ | . . O X . . 9 a X X X . . |
$$ | . O X X X 5 8 0 b d e . . |
$$ | . O X 1 O 4 6 7 c f g . . |
$$ | . X Q Q 2 O 3 k j h O i . |
$$ | . X X Q O X o n l X X O . |
$$ | . X O X X . . . m . . O . |
$$ | . O O X . . , X O O . . . |
$$ | . . O X O X . X X X O . . |
$$ | . . O O X . X . . . O . . |
$$ | . . . . . X . . . . . . . |
$$ ---------------------------[/go]
Re: L19 Go Problem Championship: Round 12
Posted: Mon May 08, 2017 10:13 am
by Kirby
@hyperpape:
$$Bc hopefully good enough for B?
$$ ---------------------------
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . O X . . . |
$$ | . O . O O . . O X O . . . |
$$ | . . O X . . , . X X X . . |
$$ | . O X . X . . . . . . . . |
$$ | . O X 5 2 3 . . . . . . . |
$$ | . X Q Q 1 . , . . , O . . |
$$ | . X X Q 4 6 . 7 . X X O . |
$$ | 8 X O X X . . . . . . O . |
$$ | . O O X . . , X O O . . . |
$$ | . . O X O X . X X X O . . |
$$ | . . O O X . X . . . O . . |
$$ | . . . . . X . . . . . . . |
$$ ---------------------------
[go]$$Bc hopefully good enough for B?
$$ ---------------------------
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . O X . . . |
$$ | . O . O O . . O X O . . . |
$$ | . . O X . . , . X X X . . |
$$ | . O X . X . . . . . . . . |
$$ | . O X 5 2 3 . . . . . . . |
$$ | . X Q Q 1 . , . . , O . . |
$$ | . X X Q 4 6 . 7 . X X O . |
$$ | 8 X O X X . . . . . . O . |
$$ | . O O X . . , X O O . . . |
$$ | . . O X O X . X X X O . . |
$$ | . . O O X . X . . . O . . |
$$ | . . . . . X . . . . . . . |
$$ ---------------------------[/go]
Maybe consider an alternate move for ?
Re: L19 Go Problem Championship: Round 12
Posted: Mon May 08, 2017 10:14 am
by Kirby
@gamesorry:
Yep.
Re: L19 Go Problem Championship: Round 12
Posted: Tue May 09, 2017 6:37 am
by hyperpape
Wow, what a case of tunnel vision. When I plan the first move, I know the issue is reducing White's liberties, but I got so caught up in proving White can't escape that I forgot it.
Anyway, I still can't see an answer. I'll have to keep looking.
$$
$$ ---------------------------
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . O X . . . |
$$ | . O . O O . . O X O . . . |
$$ | . . O X . . , . X X X . . |
$$ | . O X 5 X . . . . . . . . |
$$ | . O X 4 2 6 . . . . . . . |
$$ | . X Q Q 1 . , . . , O . . |
$$ | . X X Q 3 . . . . X X O . |
$$ | . X O X X . . . . . . O . |
$$ | . O O X . . , X O O . . . |
$$ | . . O X O X . X X X O . . |
$$ | . . O O X . X . . . O . . |
$$ | . . . . . X . . . . . . . |
$$ ---------------------------
[go]$$
$$ ---------------------------
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . O X . . . |
$$ | . O . O O . . O X O . . . |
$$ | . . O X . . , . X X X . . |
$$ | . O X 5 X . . . . . . . . |
$$ | . O X 4 2 6 . . . . . . . |
$$ | . X Q Q 1 . , . . , O . . |
$$ | . X X Q 3 . . . . X X O . |
$$ | . X O X X . . . . . . O . |
$$ | . O O X . . , X O O . . . |
$$ | . . O X O X . X X X O . . |
$$ | . . O O X . X . . . O . . |
$$ | . . . . . X . . . . . . . |
$$ ---------------------------[/go]
$$
$$ ---------------------------
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . O X . . . |
$$ | . O . O O . . O X O . . . |
$$ | . . O X . . , . X X X . . |
$$ | . O X 4 X . . . . . . . . |
$$ | . O X . 2 . . . . . . . . |
$$ | . X Q Q 1 3 , . . , O . . |
$$ | . X X Q . . . . . X X O . |
$$ | . X O X X . . . . . . O . |
$$ | . O O X . . , X O O . . . |
$$ | . . O X O X . X X X O . . |
$$ | . . O O X . X . . . O . . |
$$ | . . . . . X . . . . . . . |
$$ ---------------------------
[go]$$
$$ ---------------------------
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . O X . . . |
$$ | . O . O O . . O X O . . . |
$$ | . . O X . . , . X X X . . |
$$ | . O X 4 X . . . . . . . . |
$$ | . O X . 2 . . . . . . . . |
$$ | . X Q Q 1 3 , . . , O . . |
$$ | . X X Q . . . . . X X O . |
$$ | . X O X X . . . . . . O . |
$$ | . O O X . . , X O O . . . |
$$ | . . O X O X . X X X O . . |
$$ | . . O O X . X . . . O . . |
$$ | . . . . . X . . . . . . . |
$$ ---------------------------[/go]
Re: L19 Go Problem Championship: Round 12
Posted: Tue May 09, 2017 8:56 am
by Kirby
@hyperpape:
Hint: (look if you want it)
After , this weak point is pretty annoying - it keeps posing a problem...
$$
$$ ---------------------------
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . O X . . . |
$$ | . O . O O . . O X O . . . |
$$ | . . O X . . , . X X X . . |
$$ | . O X C X . . . . . . . . |
$$ | . O X . 2 . . . . . . . . |
$$ | . X O O 1 . , . . , O . . |
$$ | . X X O . . . . . X X O . |
$$ | . X O X X . . . . . . O . |
$$ | . O O X . . , X O O . . . |
$$ | . . O X O X . X X X O . . |
$$ | . . O O X . X . . . O . . |
$$ | . . . . . X . . . . . . . |
$$ ---------------------------
[go]$$
$$ ---------------------------
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . O X . . . |
$$ | . O . O O . . O X O . . . |
$$ | . . O X . . , . X X X . . |
$$ | . O X C X . . . . . . . . |
$$ | . O X . 2 . . . . . . . . |
$$ | . X O O 1 . , . . , O . . |
$$ | . X X O . . . . . X X O . |
$$ | . X O X X . . . . . . O . |
$$ | . O O X . . , X O O . . . |
$$ | . . O X O X . X X X O . . |
$$ | . . O O X . X . . . O . . |
$$ | . . . . . X . . . . . . . |
$$ ---------------------------[/go]
Re: L19 Go Problem Championship: Round 12
Posted: Tue May 09, 2017 6:04 pm
by jeromie
I haven't tried to solve these problems in a while.
Problem 1 (3 points)
This seems so easy I feel like I might be missing something.
$$Bc
$$ --------------
$$ | X O . O X . .
$$ | X 1 X X X O .
$$ | . . O O O O .
$$ | O O . , . . .
$$ | . . . . . . .
[go]$$Bc
$$ --------------
$$ | X O . O X . .
$$ | X 1 X X X O .
$$ | . . O O O O .
$$ | O O . , . . .
$$ | . . . . . . .[/go]
Problem 2 (6 points)
This one is fun!
$$Bc
$$ ---------------------------
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . O X . . . |
$$ | . O . O O . . O X O . . . |
$$ | . . O X . . , . X X X . . |
$$ | . O X 3 X . . . . . . . . |
$$ | . O X . 2 . . . . . . . . |
$$ | . X Q Q 1 . , . . , O . . |
$$ | . X X Q . . . . . X X O . |
$$ | . X O X X . . . . . . O . |
$$ | . O O X . . , X O O . . . |
$$ | . . O X O X . X X X O . . |
$$ | . . O O X . X . . . O . . |
$$ | . . . . . X . . . . . . . |
$$ ---------------------------
[go]$$Bc
$$ ---------------------------
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . O X . . . |
$$ | . O . O O . . O X O . . . |
$$ | . . O X . . , . X X X . . |
$$ | . O X 3 X . . . . . . . . |
$$ | . O X . 2 . . . . . . . . |
$$ | . X Q Q 1 . , . . , O . . |
$$ | . X X Q . . . . . X X O . |
$$ | . X O X X . . . . . . O . |
$$ | . O O X . . , X O O . . . |
$$ | . . O X O X . X X X O . . |
$$ | . . O O X . X . . . O . . |
$$ | . . . . . X . . . . . . . |
$$ ---------------------------[/go]
If white resists, this gets long...
$$Bc
$$ ---------------------------
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . O X . . . |
$$ | . O . O O . . O X O . . . |
$$ | . . O X . . , . X X X . . |
$$ | . O X 3 X . . . . . . . . |
$$ | . O X 7 2 . . . . . . . . |
$$ | . X Q Q 1 6 , . . , O . . |
$$ | . X X Q 4 5 . . . X X O . |
$$ | . X O X X . . . . . . O . |
$$ | . O O X . . , X O O . . . |
$$ | . . O X O X . X X X O . . |
$$ | . . O O X . X . . . O . . |
$$ | . . . . . X . . . . . . . |
$$ ---------------------------
[go]$$Bc
$$ ---------------------------
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . O X . . . |
$$ | . O . O O . . O X O . . . |
$$ | . . O X . . , . X X X . . |
$$ | . O X 3 X . . . . . . . . |
$$ | . O X 7 2 . . . . . . . . |
$$ | . X Q Q 1 6 , . . , O . . |
$$ | . X X Q 4 5 . . . X X O . |
$$ | . X O X X . . . . . . O . |
$$ | . O O X . . , X O O . . . |
$$ | . . O X O X . X X X O . . |
$$ | . . O O X . X . . . O . . |
$$ | . . . . . X . . . . . . . |
$$ ---------------------------[/go]
$$Wc
$$ ---------------------------
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . O X . . . |
$$ | . O . O O . . O X O . . . |
$$ | . . O X . . 8 0 X X X . . |
$$ | . O X X X 4 7 9 . . . . . |
$$ | . O X X O 3 5 6 . . . . . |
$$ | . X Q Q 1 O 2 . . , O . . |
$$ | . X X Q O X . . . X X O . |
$$ | . X O X X . . . . . . O . |
$$ | . O O X . . , X O O . . . |
$$ | . . O X O X . X X X O . . |
$$ | . . O O X . X . . . O . . |
$$ | . . . . . X . . . . . . . |
$$ ---------------------------
[go]$$Wc
$$ ---------------------------
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . O X . . . |
$$ | . O . O O . . O X O . . . |
$$ | . . O X . . 8 0 X X X . . |
$$ | . O X X X 4 7 9 . . . . . |
$$ | . O X X O 3 5 6 . . . . . |
$$ | . X Q Q 1 O 2 . . , O . . |
$$ | . X X Q O X . . . X X O . |
$$ | . X O X X . . . . . . O . |
$$ | . O O X . . , X O O . . . |
$$ | . . O X O X . X X X O . . |
$$ | . . O O X . X . . . O . . |
$$ | . . . . . X . . . . . . . |
$$ ---------------------------[/go]
$$B
$$ +---------------------------+
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . O X . . . |
$$ | . O . O O . . O X O . . . |
$$ | . . O X . . X 1 X X X . . |
$$ | . O X X X X O O 2 4 5 . . |
$$ | . O X X O O O X 3 6 7 . . |
$$ | . X O O O O X . 0 8 O 9 . |
$$ | . X X O O X . . . X X O . |
$$ | . X O X X . . . . . . O . |
$$ | . O O X . . . X O O . . . |
$$ | . . O X O X . X X X O . . |
$$ | . . O O X . X . . . O . . |
$$ | . . . . . X . . . . . . . |
$$ +---------------------------+
[go]$$B
$$ +---------------------------+
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . O X . . . |
$$ | . O . O O . . O X O . . . |
$$ | . . O X . . X 1 X X X . . |
$$ | . O X X X X O O 2 4 5 . . |
$$ | . O X X O O O X 3 6 7 . . |
$$ | . X O O O O X . 0 8 O 9 . |
$$ | . X X O O X . . . X X O . |
$$ | . X O X X . . . . . . O . |
$$ | . O O X . . . X O O . . . |
$$ | . . O X O X . X X X O . . |
$$ | . . O O X . X . . . O . . |
$$ | . . . . . X . . . . . . . |
$$ +---------------------------+[/go]
$$B
$$ +---------------------------+
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . O X . . . |
$$ | . O . O O . . O X O . . . |
$$ | . . O X . . X X X X X . . |
$$ | . O X X X X O O O O X . . |
$$ | . O X X O O O X X O X . . |
$$ | . X O O O O X 1 O O O X . |
$$ | . X X O O X 5 4 2 X X O . |
$$ | . X O X X . 7 6 3 . . O . |
$$ | . O O X . . . X O O . . . |
$$ | . . O X O X . X X X O . . |
$$ | . . O O X . X . . . O . . |
$$ | . . . . . X . . . . . . . |
$$ +---------------------------+
[go]$$B
$$ +---------------------------+
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . O X . . . |
$$ | . O . O O . . O X O . . . |
$$ | . . O X . . X X X X X . . |
$$ | . O X X X X O O O O X . . |
$$ | . O X X O O O X X O X . . |
$$ | . X O O O O X 1 O O O X . |
$$ | . X X O O X 5 4 2 X X O . |
$$ | . X O X X . 7 6 3 . . O . |
$$ | . O O X . . . X O O . . . |
$$ | . . O X O X . X X X O . . |
$$ | . . O O X . X . . . O . . |
$$ | . . . . . X . . . . . . . |
$$ +---------------------------+[/go]