What is the name of the opening for black that mixes modern defense with caro kann?
Gurgenidze system.
Pawn structure: 2DEd1cg
Thanks for the reply! This seems like it, although when i looked it up seemed like the moves were reversed. It seems for the Gurgenidze you do a caro kann and then fianchetto afterwards. When Hikaru does this opening, he starts off with the fianchetto and then does caro kann.


There's a book by GM Jann Ehlvest titled The Modern Gurgenidze that was published in 2023.
In the book, after 1 e4 g6 2 d4 Bg7 3 Nf3 black plays the Modern with 3...d6. However, if white goes 3 Nc3 black switches to the Gurgenidze with 3...c6. The idea is to avoid the very dangerous Austrian Attack white could play against the Modern with 4 f4 after 3 Nc3 when the white f pawn is unblocked by a knight on f3. Also, 1 e4 g6 2 d4 Bg7 3 f4 d5 in covered.
The book also has some coverage on 1 d4 g6 2 c4, 1 c4 g6 2 Nc3, 1 d4 g6 2 Nf3, 1 b3 g6, 1 f4 g6.