g,ng

Start

done, second guess

Starting over.

Really tough, had to start over again

Done. What a nasty puzzle!

done

You'll need the guardian angle for this monster.

done

took one guess which was quickly disproven. got lucky, as the opposite way let everything fall in.

Some experts are monsters :-) BUt this one needed only one guess - a long forced sequence that led to contradiction. If I can see that without greens it's not a guess but an experts trick :-)

/without greens/i meant /without trying/