10-ruble coins.

Thank you for the addition, Dmitrov; I am adding all new coins to the list in the original post.

As for the 2-ruble coins—there seem to be only 8:
- In memory of Yu.A. Gagarin
- Hero City Leningrad
- Hero City Moscow
- Hero City Murmansk
- Hero City Novorossiysk
- Hero City Smolensk
- Hero City Stalingrad
- Hero City Tula

As for the 1-ruble ones, I've only encountered two:
- 10 years of CIS
- In memory of A.S. Pushkin

So you can't really collect much here! ;)

From sources close to reliable—meaning from the internet—I learned that there are:
- Torzhok
- Belgorod
It would be good if someone could confirm, but for now I assume they don't exist. Where are the forum numismatists? Out of 4981 people!