$$Bcm1 Black to play
$$ -------------------
$$ | . . . . . O . . . |
$$ | . . O O O X . X . |
$$ | . O X X X X . . . |
$$ | O . O . X . X . . |
$$ | O O O X . . . X X |
$$ | X X X X X X X O X |
$$ | . X . O X O O O X |
$$ | . X X O O . . . O |
$$ | . . X O . O . O . |
$$ -------------------
$$ -------------------
$$ | . . . . . O . . . |
$$ | . . O O O X . X . |
$$ | . O X X X X . . . |
$$ | O . O . X . X . . |
$$ | O O O X . . . X X |
$$ | X X X X X X X O X |
$$ | . X . O X O O O X |
$$ | . X X O O . . . O |
$$ | . . X O . O . O . |
$$ -------------------
- Click Here To Show Diagram Code
[go]$$Bcm1 Black to play
$$ -------------------
$$ | . . . . . O . . . |
$$ | . . O O O X . X . |
$$ | . O X X X X . . . |
$$ | O . O . X . X . . |
$$ | O O O X . . . X X |
$$ | X X X X X X X O X |
$$ | . X . O X O O O X |
$$ | . X X O O . . . O |
$$ | . . X O . O . O . |
$$ -------------------[/go]
Which is larger?
$$Bcm1
$$ -------------------
$$ | . . . . b O a . . |
$$ | . . O O O X . X . |
$$ | . O X X X X . . . |
$$ | O . O . X . X . . |
$$ | O O O X . . . X X |
$$ | X X X X X X X O X |
$$ | . X . O X O O O X |
$$ | . X X O O . . . O |
$$ | . . X O . O . O . |
$$ -------------------
$$ -------------------
$$ | . . . . b O a . . |
$$ | . . O O O X . X . |
$$ | . O X X X X . . . |
$$ | O . O . X . X . . |
$$ | O O O X . . . X X |
$$ | X X X X X X X O X |
$$ | . X . O X O O O X |
$$ | . X X O O . . . O |
$$ | . . X O . O . O . |
$$ -------------------
- Click Here To Show Diagram Code
[go]$$Bcm1
$$ -------------------
$$ | . . . . b O a . . |
$$ | . . O O O X . X . |
$$ | . O X X X X . . . |
$$ | O . O . X . X . . |
$$ | O O O X . . . X X |
$$ | X X X X X X X O X |
$$ | . X . O X O O O X |
$$ | . X X O O . . . O |
$$ | . . X O . O . O . |
$$ -------------------[/go]
Assuming White ignores
, what is the value of Black's followup?
$$Bcm1
$$ -------------------
$$ | . . . . 1 O 2 3 . |
$$ | . . O O O X . X . |
$$ | . O X X X X . . . |
$$ | O . O . X . X . . |
$$ | O O O X . . . X X |
$$ | X X X X X X X O X |
$$ | . X . O X O O O X |
$$ | . X X O O . . . O |
$$ | . . X O . O . O . |
$$ -------------------
$$ -------------------
$$ | . . . . 1 O 2 3 . |
$$ | . . O O O X . X . |
$$ | . O X X X X . . . |
$$ | O . O . X . X . . |
$$ | O O O X . . . X X |
$$ | X X X X X X X O X |
$$ | . X . O X O O O X |
$$ | . X X O O . . . O |
$$ | . . X O . O . O . |
$$ -------------------
- Click Here To Show Diagram Code
[go]$$Bcm1
$$ -------------------
$$ | . . . . 1 O 2 3 . |
$$ | . . O O O X . X . |
$$ | . O X X X X . . . |
$$ | O . O . X . X . . |
$$ | O O O X . . . X X |
$$ | X X X X X X X O X |
$$ | . X . O X O O O X |
$$ | . X X O O . . . O |
$$ | . . X O . O . O . |
$$ -------------------[/go]
Assuming Black ignores
, what is the value of White's followup?
$$Bcm1
$$ -------------------
$$ | . . . . 1 O 2 . . |
$$ | . . O O O X . X . |
$$ | . O X X X X . . . |
$$ | O . O . X . X . . |
$$ | O O O X . . . X X |
$$ | X X X X X X X O X |
$$ | . X . O X O O O X |
$$ | . X X O O . . . O |
$$ | . . X O . O . O . |
$$ -------------------
$$ -------------------
$$ | . . . . 1 O 2 . . |
$$ | . . O O O X . X . |
$$ | . O X X X X . . . |
$$ | O . O . X . X . . |
$$ | O O O X . . . X X |
$$ | X X X X X X X O X |
$$ | . X . O X O O O X |
$$ | . X X O O . . . O |
$$ | . . X O . O . O . |
$$ -------------------
- Click Here To Show Diagram Code
[go]$$Bcm1
$$ -------------------
$$ | . . . . 1 O 2 . . |
$$ | . . O O O X . X . |
$$ | . O X X X X . . . |
$$ | O . O . X . X . . |
$$ | O O O X . . . X X |
$$ | X X X X X X X O X |
$$ | . X . O X O O O X |
$$ | . X X O O . . . O |
$$ | . . X O . O . O . |
$$ -------------------[/go]
Having answered the previous questions, assume White can make a ko on the board with a variable value. At what value of the ko should Black choose A or B? Or does the value of the ko not affect Black's choice?
$$Bcm1
$$ -------------------
$$ | . . . . b O a . . |
$$ | . . O O O X . X . |
$$ | . O X X X X . . . |
$$ | O . O . X . X . . |
$$ | O O O X . . . X X |
$$ | X X X X X X X O X |
$$ | . X . O X O O O X |
$$ | . X X O O . . . O |
$$ | . . X O . O . O . |
$$ -------------------
$$ -------------------
$$ | . . . . b O a . . |
$$ | . . O O O X . X . |
$$ | . O X X X X . . . |
$$ | O . O . X . X . . |
$$ | O O O X . . . X X |
$$ | X X X X X X X O X |
$$ | . X . O X O O O X |
$$ | . X X O O . . . O |
$$ | . . X O . O . O . |
$$ -------------------
- Click Here To Show Diagram Code
[go]$$Bcm1
$$ -------------------
$$ | . . . . b O a . . |
$$ | . . O O O X . X . |
$$ | . O X X X X . . . |
$$ | O . O . X . X . . |
$$ | O O O X . . . X X |
$$ | X X X X X X X O X |
$$ | . X . O X O O O X |
$$ | . X X O O . . . O |
$$ | . . X O . O . O . |
$$ -------------------[/go]
In this position should Black answer A or B?
$$Bcm1 Black to play
$$ -------------------
$$ | . . . . b O a . . |
$$ | . . O O O X . X . |
$$ | . O X X X X . . . |
$$ | O . O . X . X . . |
$$ | O O O X . . . X X |
$$ | X X X X X X X O X |
$$ | . X . O X O O O X |
$$ | . X X O O . . . O |
$$ | . . X O . O . O . |
$$ -------------------
$$ -------------------
$$ | . . . . b O a . . |
$$ | . . O O O X . X . |
$$ | . O X X X X . . . |
$$ | O . O . X . X . . |
$$ | O O O X . . . X X |
$$ | X X X X X X X O X |
$$ | . X . O X O O O X |
$$ | . X X O O . . . O |
$$ | . . X O . O . O . |
$$ -------------------
- Click Here To Show Diagram Code
[go]$$Bcm1 Black to play
$$ -------------------
$$ | . . . . b O a . . |
$$ | . . O O O X . X . |
$$ | . O X X X X . . . |
$$ | O . O . X . X . . |
$$ | O O O X . . . X X |
$$ | X X X X X X X O X |
$$ | . X . O X O O O X |
$$ | . X X O O . . . O |
$$ | . . X O . O . O . |
$$ -------------------[/go]