The two off (for 279) was not very difficult for me, here and I've found several variations of it. But the last two steps are tricky. I tried the idea even sooner, but didn't do it right, so I eliminated it. But later tried it again, cause nothing else seemed to work. :)
Very nice find, sspenst!
a year ago
I was honestly not expecting that to save 2 moves. Really satisfying solve
Interesting concept. There was one key idea that helped me get from 279 to 277, it makes a lot of sense when you see it. I looked for a bit but couldn't find any more cuts, so hopefully this record is safe for now...