Can't believe I got it on first try! I was studying a long time before to start, until I understood the concept. Once so far, I took time again to estimate what row should be the "main" one, to avoid wasting too many moves. I decided for one, gave it a careful try and arrived at target with correct amount of steps... Unbelievable! Put it on luck because once concept is clear, it's really purely a matter of luck to select the correct key row.
Now even if I enjoyed it, I remove one star because to my taste, it's too long and somewhat overloaded.
