Challenging pipelining, shortcuts and optimization. Never expected that route before because of my poor implementation... (that finally led to a painful 2-off) Really surprised after playing. I have to say this is one of my favourites.
4 tries great level. never actually saw the 4 off trick (went striaght from 4 off to done) but amazing way to hide the true solution and nice fun and crazy path!
That's really a nice 2-cut. If you don't get it, taking a rest may be helpful. One lock is well-hidden and I couldn't figure it out at the beginning, great.
Insights