@annada
From the rules:
In addition, shaded squares must not touch each other veritcally or horizontally
Your very 1st solution, very 1st 2 numbers, 2-5, has 2 shaded numbers horizontally next to each other. So, the very 1st 2 numbers you put broke the rules. Please read the rules 1st.
 "Hitori Light Vol 1"){kind=icon}