I need Help, am stuck in the level 7
My solutions for 6 and 7 are (rot13):
Gjb dhrraf
Gjb xavtugf obgu tvivat purpx
Then I’m stuck on level 8 nsgre orvat yvzvgrq gb cnjaf naq ebbxf. Pna'g oybpx gur ovfubc'f fgnegvat cbfvgvba orpnhfr bar bs gubfr fdhnerf vf nyernql erq. Oybpxvat gur zvffvat ovfubc'f fgnegvat cbfvgvba qbrfa'g jbex orpnhfr vg pbhyq unir orra pncgherq ol oynpx'f xavtug.
If you're stuck at level 7, the solution you've missed is probably double-checking the king.
Level 8 is about White to Move, ergo Black just moved — but there's only one black piece that could have just moved, make that case impossible.
Level 9, there's a certain place black's knight can't be while black is also in check.