should win the ko. saves his four stones. is a 2 pt. reverse sente. Result: W +11. (Black has captured a stone at .)
, take ko.
, replying to Black's threat, is a mistake.
wins ko.
threatens another ko, but White cannot afford to reply to the threat. When takes the ko, White has no threat. Result: B +1.
Referenced byKoFightExercise1
![[Welcome to Sensei's Library!]](images/stone-hello.png "Sensei's Library")
![[Diagram]](diagrams/4/6375630e86829441d9f9518f615cec51.png)
should win the ko. 
saves his four stones. 
is a 2 pt. reverse sente. Result: W +11. (Black has captured a stone at 
.)
![[Diagram]](diagrams/17/6e61485685859964d53bcadc4a79f76f.png)
, 
take ko.
![[Diagram]](diagrams/38/c16b479db2c9b39d8d21c88e8da70dd9.png)
wins ko.
threatens another ko, but White cannot afford to reply to the threat. When 
takes the ko, White has no threat. Result: B +1.