The Semi-Slav Defense: Main Line is a chess opening classified under ECO code D45 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 5 moves: 1. d4 d5 2. c4 c6 3. Nc3 Nf6 4. e3 e6 5. Nf3. The resulting position leaves black to move.
Resulting Position
1. d4 d5 2. c4 c6 3. Nc3 Nf6 4. e3 e6 5. Nf3
rnbqkb1r/pp3ppp/2p1pn2/3p4/2PP4/2N1PN2/PP3PPP/R1BQKB1R b KQkq - 1 5Resulting Position