Grünfeld Defense: Russian Variation, Yugoslav Variation

The Grünfeld Defense: Russian Variation, Yugoslav Variation is a chess opening classified under ECO code D99 in the Closed & Semi-Closed Games family, arising from 1.d4 d5, including the Queen's Gambit, Slav Defense, and related systems. It is reached after 9 moves: 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7 5. Qb3 dxc4 6. Qxc4 O-O 7. e4 Bg4 8. Be3 Nfd7 9. Qb3 c5. The resulting position leaves white to move.