Animiral: Black has a stone on the outside now, but the ko-avoiding solution at Q19 is incorrectly marked “Incorrect”, while the blocking “Correct” variation still needs ko.
Ivan Detkov: I added a stone at R14 to avoid complications. I marked ko as incorrect and made Q19 correct.
Black has a stone on the outside now, but the ko-avoiding solution at Q19 is incorrectly marked “Incorrect”, while the blocking “Correct” variation still needs ko.