Evil, evil, evil. There goes (or rather, went) a chunk of my time :) [and fwiw, I got to a point in 40 where reasoning didn't seem to be working, so I just started making random moves. 10 or so random moves later it was solved....]
It's definitely much easier coming back to it after having done it before. I've not been trying to do it in minimal moves, just to get it done, and it only took me an hour or so to whizz through the whole lot this afternoon.
I generally just move things around a bit, look at what's still in the way, think about what needs to move in order to move it, look at what gaps there are I can shove things in, then shuffle some more. And usually it all falls out pretty quickly.
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:)
[and fwiw, I got to a point in 40 where reasoning didn't seem to be working, so I just started making random moves. 10 or so random moves later it was solved....]
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I generally just move things around a bit, look at what's still in the way, think about what needs to move in order to move it, look at what gaps there are I can shove things in, then shuffle some more. And usually it all falls out pretty quickly.