Grandmaster Atanas Kolev teaches a chess class on a topic of his choice.
2022.01.13
Evgeny Bareev vs Giorgi Giorgadze, Moscow Olympiad (1994): A40 Modern defence
https://www.chessgames.com/perl/chessgame?gid=2038072
Mikhail Tal vs Atanas Stefanov Kolarov, EUR-chT (Men) 4th (1970): B15 Caro-Kann, Gurgenidze system
https://www.chessgames.com/perl/chessgame?gid=1139941