B0sch: The line by playing E1 is marked incorrect whereas it kills. E1 and then later D2 makes sure D2 is a false eye, it might lead to a ko, but the exercise doesn't say "no ko" and no other path works anyway.
d4rkm4tter: If there is a clean kill, ko is wrong.
The line by playing E1 is marked incorrect whereas it kills. E1 and then later D2 makes sure D2 is a false eye, it might lead to a ko, but the exercise doesn't say "no ko" and no other path works anyway.