Personally, I find it a good level and was stuck 4 off for a while. If not taking care, it's easy to over complicate a certain location and remain blind on that. So, if you're stuck 4 or 2 off, focus on the few locations where there are several ways to go through and simplify... :D
Got it on first try. I find it by far too easy: 52 is a small amount of moves for such a big board, with also the need to move a minimum of 4 blocks to target, what is costly. Logically, target needs to be close to start position and with the less holes possible. That tells it all.
