Semi-Slav Defense: Main Line

1. d4 d5 2. c4 c6 3. Nc3 Nf6 4. e3 e6 5. Nf3

Semi-Slav Defense: Main Line is catalogued under ECO code D45. It is reached after 5 moves (9 half-moves): 1. d4 d5 2. c4 c6 3. Nc3 Nf6 4. e3 e6 5. Nf3. After the last move it is Black to play. White opens 1. d4. It is a named variation of the Semi-Slav Defense, which has 69 catalogued lines in total. 3 deeper lines continue from here, listed below.

Position shown after the last move; Black to play.