Well that was awful. No logic, multiple solutions and that 5 does start in c20 not c19. How this got a rating higher than 1/10 I will never know. Please for the love of god, check your puzzle before submitting it.
You're welcome Sena. I noticed you already solved the puzzle. Posted hints for future solvers since the images for the puzzle are posted on a different page. :)
Just like favorite authors, I have favorite solvers too! (Sometimes the same person is in both categories.) Teesea & Strigoii, you are incredible. Thanks!
Use Teesea's hints, including R1 C20-24.
R10 C7,11,18-22 ; R12 C2,22-23 ; R14 C2,8,14,24
R16 C4,7,10-13,18,23 ; R18 C2,6,9,16,21,23 ; R20 C4,8-9,18.