Life In 19x19

Posted: **Tue Jun 29, 2010 1:00 am**

White (Yamashita) took the 5th game of the Honinbo match a few minutes ago to win the title 4-1 against defender Hane Naoki. Here is the complete game:

Posted: **Tue Jun 29, 2010 1:04 am**

Here are two particularly interesting moments in the endgame (which surprised at least the sizeable IGS audience).

[go]$$Wc Reduction tesuji? What happens after H12?
$$ +-------------------------------------+
$$ |. . . . . . . . . . . . . . . . . . .|
$$ |. X X . . . . . . . . . . . . . X X .|
$$ |. O X O . . . . . . . . . X . . X O .|
$$ |. . O X X . X . . X . . . . . X O O .|
$$ |. . O O X . . X . . . . . . . X X O .|
$$ |. . X O O . O X . . . . . . . . X X O|
$$ |. . . . O . O O X . . . . X O . O O .|
$$ |. . . . . X . . . . . . . X X O O X .|
$$ |. . . O O X . . @ . X . X . . O X O O|
$$ |. . . , . O X X . , X O . O O O X X .|
$$ |. . . . . . O X . . . . O . O X X . .|
$$ |. . . . . O . O . X . O . O X O O X .|
$$ |. . . . . X O . O X . . O X X . . . .|
$$ |. . O O O O . O X X . . . . . . X . .|
$$ |. . X . . . O X X O X . . . . O X . .|
$$ |. . O O . X . X O O . O . O . O X . .|
$$ |. . X . O X . . X O O . . . O X X . .|
$$ |. . . . O . . . X . . . . . . O . . .|
$$ |. . . . . . . . . . . . . . . . . . .|
$$ +-------------------------------------+[/go]

[go]$$Wc Mistake? What is black trying to accomplish here?
$$ +-------------------------------------+
$$ |. X . . . . . . . . . . . . . . . . .|
$$ |O X X O X . . . . . . . . . . . X X .|
$$ |. O X O . . . . . . . . . X . . X O X|
$$ |. O O X X . X . . X . . . . . X O O .|
$$ |. . O O X . . X . . . . . X . X X O O|
$$ |. . X O O . O X . . . . . . O . X X O|
$$ |. . . . O . O O X X . . . X O . O O .|
$$ |. . . . . X . . O . . . . X X O O X .|
$$ |. . . O O X X O O . X . X . . O X O O|
$$ |. . . , . O X X X , X O . O O O X X O|
$$ |. . . . . . O X O X X . O . O X X X .|
$$ |. . . . . O . O O X . O . O X O O X .|
$$ |. . . . . X O . O X . . O X X X . . .|
$$ |. . O O O O . O X X . O . O X . X . .|
$$ |. . X . . . O X X O X . # . O O X . .|
$$ |. . O O . X . X O O . O . O . O X . .|
$$ |. . X . O X X . X O O . . . O X X . .|
$$ |. . . . O X O . X . . O . . O O X . .|
$$ |. . . . . O . . X . X X O . . . . . .|
$$ +-------------------------------------+[/go]

Posted: **Tue Jun 29, 2010 3:11 am**

[go]$$Bc Reduction tesuji? What happens after H12?
$$ +-------------------------------------+
$$ |. . . . . . . . . . . . . . . . . . .|
$$ |. X X . . . . . . . . . . . . . X X .|
$$ |. O X O . . . . . . . . . X . . X O .|
$$ |. . O X X . X . . X . . . . . X O O .|
$$ |. . O O X . . X . . . . . . . X X O .|
$$ |. . X O O . O X . . . . . . . . X X O|
$$ |. . . . O . O O X . . . . X O . O O .|
$$ |. . . . . X . 1 0 . . b . X X O O X .|
$$ |. . . O O X . a @ 9 X . X . . O X O O|
$$ |. . . , . O X X 3 8 X O . O O O X X .|
$$ |. . . . . . O X 2 4 5 . O . O X X . .|
$$ |. . . . . O . O 6 X 7 O . O X O O X .|
$$ |. . . . . X O . O X . . O X X . . . .|
$$ |. . O O O O . O X X . . . . . . X . .|
$$ |. . X . . . O X X O X . . . . O X . .|
$$ |. . O O . X . X O O . O . O . O X . .|
$$ |. . X . O X . . X O O . . . O X X . .|
$$ |. . . . O . . . X . . . . . . O . . .|
$$ |. . . . . . . . . . . . . . . . . . .|
$$ +-------------------------------------+[/go]
Wow, the white move is simply amazing, I believe Black cant play H12 because of the shown variation above, if Black ladders white at 'a' White can play 'b' as a ladderbreaker and connect out.

[go]$$Wc Mistake? What is black trying to accomplish here?
$$ +-------------------------------------+
$$ |. X . . . . . . . . . . . . . . . . .|
$$ |O X X O X . . . . . . . . . . . X X .|
$$ |. O X O . . . . . . . . . X . . X O X|
$$ |. O O X X . X . . X . . . . . X O O .|
$$ |. . O O X . . X . . . . . X . X X O O|
$$ |. . X O O . O X . . . . . . O . X X O|
$$ |. . . . O . O O X X . . . X O . O O .|
$$ |. . . . . X . . O . . . . X X O O X .|
$$ |. . . O O X X O O . X . X . . O X O O|
$$ |. . . , . O X X X , X O . O O O X X O|
$$ |. . . . . . O X O X X . O . O X X X .|
$$ |. . . . . O . O O X . O . O X O O X .|
$$ |. . . . . X O . O X . . O X X X . . .|
$$ |. . O O O O . O X X 4 O . O X a X . .|
$$ |. . X . . . O X X O X 1 # 2 O O X . .|
$$ |. . O O . X . X O O . O 3 O . O X . .|
$$ |. . X . O X X . X O O . . . O X X . .|
$$ |. . . . O X O . X . . O . . O O X . .|
$$ |. . . . . O . . X . X X O . . . . . .|
$$ +-------------------------------------+[/go]
Hmmm now White cant atari at 'a', otherwise I dont see a reason to play the marked stone...

Posted: **Tue Jun 29, 2010 5:48 am**

Jonas: close..but i think your sequence is wrong..because black can atari from behind ang giveup two stone.
below is correct sequence i think...

Click Here To Show Diagram Code: [go]$$Bc Reduction tesuji? What happens after H12? $$ +-------------------------------------+ $$ |. . . . . . . . . . . . . . . . . . .| $$ |. X X . . . . . . . . . . . . . X X .| $$ |. O X O . . . . . . . . . X . . X O .| $$ |. . O X X . X . . X . . . . . X O O .| $$ |. . O O X . . X . . . . . . . X X O .| $$ |. . X O O . O X 7 . . . . . . . X X O| $$ |. . . . O . O O X 6 . . . X O . O O .| $$ |. . . . . X 5 1 4 . . . . X X O O X .| $$ |. . . O O X 3 2 @ . X . X . . O X O O| $$ |. . . , . O X X 9 . X O . O O O X X .| $$ |. . . . . . O X 8 0 . . O . O X X . .| $$ |. . . . . O . O . X . O . O X O O X .| $$ |. . . . . X O . O X . . O X X . . . .| $$ |. . O O O O . O X X . . . . . . X . .| $$ |. . X . . . O X X O X . . . . O X . .| $$ |. . O O . X . X O O . O . O . O X . .| $$ |. . X . O X . . X O O . . . O X X . .| $$ |. . . . O . . . X . . . . . . O . . .| $$ |. . . . . . . . . . . . . . . . . . .| $$ +-------------------------------------+[/go]

of if he plays 2 differently ...see below.

Click Here To Show Diagram Code: [go]$$Bc Reduction tesuji? What happens after H12? $$ +-------------------------------------+ $$ |. . . . . . . . . . . . . . . . . . .| $$ |. X X . . . . . . . . . . . . . X X .| $$ |. O X O . . . . . . . . . X . . X O .| $$ |. . O X X . X . . X . . . . . X O O .| $$ |. . O O X . . X . . . . . . . X X O .| $$ |. . X O O . O X . . . . . . . . X X O| $$ |. . . . O . O O X . . . . X O . O O .| $$ |. . . . . X 3 1 . . . . . X X O O X .| $$ |. . . O O X . 2 @ . X . X . . O X O O| $$ |. . . , . O X X 5 0 X O . O O O X X .| $$ |. . . . . . O X 4 6 7 . O . O X X . .| $$ |. . . . . O . O 8 X 9 O . O X O O X .| $$ |. . . . . X O . O X . . O X X . . . .| $$ |. . O O O O . O X X . . . . . . X . .| $$ |. . X . . . O X X O X . . . . O X . .| $$ |. . O O . X . X O O . O . O . O X . .| $$ |. . X . O X . . X O O . . . O X X . .| $$ |. . . . O . . . X . . . . . . O . . .| $$ |. . . . . . . . . . . . . . . . . . .| $$ +-------------------------------------+[/go]

for second diag. i can see that he stopped white's sente move on two places...but he also lost points so i dont understand how that can be tesuji. beyond the scope of my brain.

Posted: **Tue Jun 29, 2010 5:57 am**

Oh, I missed the atari with White 10 in your last diagram and thought this couldnt be the solution

Life In 19x19

Yamashita Keigo wins 65th Honinbo

Yamashita Keigo wins 65th Honinbo

Re: Yamashita Keigo wins 65th Honinbo

Re: Yamashita Keigo wins 65th Honinbo

Re: Yamashita Keigo wins 65th Honinbo

Re: Yamashita Keigo wins 65th Honinbo