interesting capturing race from game

emeraldemon · Post by **emeraldemon** » Sat Oct 13, 2012 1:12 pm

Black just cut off the white stones. What's the best play for both sides? Who wins the race?

Click Here To Show Diagram Code: [go]$$Bcm1 What to play? $$ --------------------------------------- $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . X O | $$ | . X X X X . . . X X X O O . . X X O . | $$ | X . X O O . X X O X O O X . X , O . . | $$ | . X O O . . X O O O O X . X X O . O . | $$ | . O X X O X O O . . . X . X O O O O . | $$ | . . O X . . X . . . . . X X O X O X . | $$ | . . O X X X . . O . O O O O X X X . X | $$ | . . O O O O X . . . . . X O X . X X O | $$ | . O O , X O . . . , . O X O X X O O O | $$ | O . O X . . . . . . X O O X X O O X . | $$ | . O X O O . . X . O O X X X O O . X . | $$ | X X X O . O O O . O X . . . O X X . . | $$ | . . X . X . X X . . O X X X O . . . . | $$ | . X X . X X . . . O . O O O 1 . . . . | $$ | X O O O . . X O . , . O X X X X . . . | $$ | . X O . . O O . . . . O X O . . . . . | $$ | . X O . . . . . . . O X . . . . . . . | $$ | . X . . . . . . . . . . . . . . . . . | $$ ---------------------------------------[/go]

Loons · Post by **Loons** » Sat Oct 13, 2012 1:34 pm

White. O7 seems the vital point.

Click Here To Show Diagram Code: [go]$$Bcm (This approach ko looks good enough for white) $$ +---------------------------------------+ $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . X O | $$ | . X X X X . . . X X X O O . . X X O . | $$ | X . X O O . X X O X O O X . X , O . . | $$ | . X O O . . X O O O O X . X X O . O . | $$ | . O X X O X O O . . . X . X O O O O 4 | $$ | . . O X . . X . . . . . X X O X O X 6 | $$ | . . O X X X . . O . O O O O X X X 7 X | $$ | . . O O O O X . . . . . X O X . X X O | $$ | . O O , X O . . . , . O X O X X O O O | $$ | O . O X . . . . . . X O O X X O O X . | $$ | . O X O O . . X . O O X X X O O . X . | $$ | X X X O . O O O . O X . 5 2 O X X . . | $$ | . . X . X . X X . . O X X X O 3 . . . | $$ | . X X . X X . . . O . O O O 1 . . . . | $$ | X O O O . . X O . , . O X X X X . . . | $$ | . X O . . O O . . . . O X O . . . . . | $$ | . X O . . . . . . . O X . . . . . . . | $$ | . X . . . . . . . . . . . . . . . . . | $$ +---------------------------------------+[/go]

(Of course it's not an approach ko. Also white should probably force at 3 first. It seems none of us are perfect.)

blade90 · Post by **blade90** » Sat Oct 13, 2012 2:41 pm

Is this from one of your games?

emeraldemon · Post by **emeraldemon** » Sat Oct 13, 2012 3:35 pm

@Loons

@blade90: Yes, it's from one of my games.

Loons · Post by **Loons** » Sat Oct 13, 2012 3:41 pm

Life In 19x19