That’s a good way of conveying what you’ve done! It seems that you can generate 2 more blocks in rooms 4 and 6 each.
Room 4:
Gur gnyy iregvpny jnyy pna or gra oybpxf gnyy jvgubhg oybpxvat lbhe jnl vagb gur svsgu ebbz.
Room 6:
Gur “qbbe” gung abeznyyl yrgf lbh cnff guebhtu n jnyy unf n frpbaq hfr gung vf arrqrq sbe guvf ebbz.
Va ebg 12:
Xifo b xbmm jt b epps, ju fggfdujwfmz bdut bt bjs, nfbojoh uibu xbmmt dbo cf hfofsbufe uispvhi ju! J usjfe up dpowfz uijt qfsibqt opo-pcwjpvt rvjsl uispvhi uif tibqf pg uif sppn, cvu jg zpv dbo uijol pg boz xbz(t) up ufmfhsbqi uijt npsf dmfbsmz, J’e mpwf up ifbs ju.
Ah! Was able to suss it out without having to resort to rot13-ing. I'd foolishly decided a certain move wasn't possible for the first missing 2 and the second 2 required such a feat of manoeuvring that I laughed out loud when I finally got it to work!
I think it's a case of spending too much time thinking I was missing something surrounding that one block that has sightlines to the big room and the last room, instead of being confidently logical.
