Why bother using Rot 13 to communicate vague information? May as well just speak in plain text.
I suppose so that others reading the comments don’t accidentally get answers spoiled for them
Some people prefer to solve everything without any hints at all, so I didn't want to spoil anything if they glance at the comments. You're right that I should have been more helpful with 8 and 9, logicalpencils has more details below.
What about level 7? Can you tell me where to put the 2 pieces? (In English)
Level 7: Lbhe ovfubc fgnegrq ba fdhner s1, vg zbirf qvntbanyyl, naq vg pna'g whzc bire bgure cvrprf.
I said in ENGLISH. Not "ngfrjhthhguyytjhythjhtyihjjhtiu" I don't understand gibberish.
OK, if you don't want to bother looking up a rot13 decoder then I'll add a bunch of line breaks to avoid Level 7 spoilers:
Your bishop is on a light-colored tile, so it must have started on tile f1. Make it impossible for the bishop to have moved from there.