posetcay: Extending at K1 before playing E6 should also be correct, it is arguably even better than the shown variation. (I couldn't edit it in myself because I don't know how to upload files where white plays first.)
d4rkm4tter: I added it. For white playing first, you need to cut and paste a white move in the editor.
Extending at K1 before playing E6 should also be correct, it is arguably even better than the shown variation. (I couldn't edit it in myself because I don't know how to upload files where white plays first.)