Someone's been sharing the code for their solver in the comments at www.mscroggs.co.uk/blog/119. There's also a link to a zip of all the solutions in that blog post if that's useful

It's not public anywhere (and it's a mess as it was slow so I hacked in ways to make it resume from where it was up to and didn't do a good version control job on it)...

It's definitely possible, but there's something interesting about column 1 that might be causing you to miss it. (Can give a stronger hint if you don't mind a possible spoiler?)

Oh I'd forgotten the awful fake snowmen

Oooh yes well spotted - I forgot to check that the entire rectangle wasn't outside the shape.

I'll also fail on the following input, which I had a plan to fix but as this situation didn't come up in my input file, I never bothered with the fix:

1,1
3,1
3,2
4,2
4,1
10,1
10,10
1,10

I'm yet to make it all the way through it and I imagine this attempt will be equally successful

#NetflixChristmas Reviews 2025 #1: Champagne Problems.

I've already forgotten the plot of this one. Although I do remember the montage of moments from earlier in the film about 2/3 of the way in - the sign of a true blockbuster.

🍾🥱😴😴😴/5

It's not (but telling you why might spoil the puzzle)