Unbelievable... I solved Brian earlier today and was able - for the first time - to clearly identify the method I used to save 2 steps.
So I came back to this present level, and tried to recreate same situation, so that I can apply the same 2 steps saver... And it worked on first try! I'm sooooooooooooo happy!
Maybe I did an important progress step forward today :D
The usual for me: I struggle to solve the 2 off and when I solve it, I have difficulties to understand why this specific route spares 2 moves compared to the tries before. It looks like I will never be good at pipelining... :(
I first had difficulty to keep enough blocks. Once I found out how to do that, I had troubles optimizing and then, I had a 2 off that was fortunately just a matter of ordering. Fun all along!
Insights