I guess this is an allowable board because I can still access the stairs even if I can't clear all the dark tiles?
...Edit: Also got one where there's inaccessible patches of darkness, surrounded all by traps, but I've reset enough. Continuing.
Yep all boards have a path to the stairs, but it's possible to have inaccessible patches of darkness.
This particular map had a path forward
Ooh, good thinking!
I think there's a conflict between the 5s and the 8s in this dark patch, but I'm not 100% sure? I'm getting better and better at no-damage running at least.
Ended up solving this problem in this manner
But then the 5 above your top 2 is not 5 but 6 (2+2+1+1)?