3

In a go game (with another 4K) I got a 2 x 4 region in the corner with lots of defects.

W1 almost surely will happen. Can White get life or ko?

$$Wm1
$$ |------------
$$ | . . . . X . 
$$ | . . O X . . 
$$ | . . O O X . 
$$ | . . O X . . 
$$ | . 1 O X . . 
$$ | . B X X . . 
$$ | . . . . . . 
3

I'm tempted to say its either ko or seki, black's choice.

$$Bm1
$$ |------------
$$ | . 2 1 . X . 
$$ | . 3 O X . . 
$$ | . . O O X . 
$$ | . . O X . . 
$$ | . O O X . . 
$$ | . X X X . . 
$$ | . . . . . . 

W2 is the only move, and B3 enters the ko.

$$Bm1
$$ |------------
$$ | . 2 1 . X . 
$$ | 3 . O X . . 
$$ | . . O O X . 
$$ | 4 . O X . . 
$$ | . O O X . . 
$$ | . X X X . . 
$$ | . . . . . . 

B3 fails, it ends in white life by W4.

$$Bm1
$$ |------------
$$ | 3 O X . X . 
$$ | X 1 O X . . 
$$ | 4 2 O O X . 
$$ | O . O X . . 
$$ | . O O X . . 
$$ | . X X X . . 
$$ | . . . . . . 

Not even a ko. If B1 at 2, W1 is seki.

$$Bm1
$$ |------------
$$ | . O X . X . 
$$ | 2 6 O X . . 
$$ | 4 5 O O X . 
$$ | 1 . O X . . 
$$ | 3 O O X . . 
$$ | . X X X . . 
$$ | . . . . . . 

1 is vital, but playing it directly doesn't work.

$$Bm1
$$ |------------
$$ | . O X a X . 
$$ | 2 . O X . . 
$$ | 1 . O O X . 
$$ | 4 5 O X . . 
$$ | 3 O O X . . 
$$ | . X X X . . 
$$ | . . . . . . 

If 1 and 2, it becomes a ko (at a).

$$Bm1
$$ |------------
$$ | . O X . X . 
$$ | . a O X . . 
$$ | 1 b O O X . 
$$ | 2 . O X . . 
$$ | . O O X . . 
$$ | . X X X . . 
$$ | . . . . . . 

White should instead answer B1 at 2, then a and b are miai for direct life.

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.