Gulls in Hungary

These pictures are for documentation only :) I need help with identification of these Gulls i saw in Hungary. I can ID some of them, but I would like to hear a few comments.

1. Caspian Gull?

2. Yellow-legged Gull?

3. This must be a Caspian Gull

4. 1cy Yellow-legged Gull?

5. This bird is moulting around the beak, but I think it is a 2cy Caspian Gull (tibia, tertials, long wing etc)

5. The same as the one before, in flight

5. The same again

6. 1cy Yellow-legged Gull?

6. The same bird, underwing

7. Some gulls, propably Caspian Gulls.

8. Some more

9.

9. Underwing

9. wing and tail

10. It could possibly be the same as nr 9.

11. Yellow-legged Gull?