ECO D31 · Semi-Slav Defense

Semi-Slav Defense: Noteboom Variation, Anti-Noteboom Variation

1. d4 d5 2. c4 e6 3. Nc3 c6 4. Nf3 dxc4 5. Bg5

abcdefgh87654321
Black to move. The arrow shows Stockfish’s best move.
Best move

5… Be7+0.05

The position is roughly equal. Stockfish 18, depth 18.

Analyze this position

In the Semi-Slav Defense: Noteboom Variation, Anti-Noteboom Variation (D31), reached after 1. d4 d5 2. c4 e6 3. Nc3 c6 4. Nf3 dxc4 5. Bg5, Stockfish 18 recommends 5… Be7 for Black. The position is roughly equal (+0.05).

Top engine moves

  1. +0.055… Be7 6. Bxe7 Qxe7 7. a4 Nf6 8. e4 b5 9. axb5 cxb5 10. Nxb5
  2. +0.445… Qc7 6. a4 Bb4 7. e4 b5 8. Be2 Nd7 9. O-O Bxc3 10. bxc3
  3. +0.485… Nf6 6. e4 b5 7. e5 h6 8. Bh4 g5 9. Nxg5 hxg5 10. Bxg5

Variations

Frequently asked questions

What is the best move in the Semi-Slav Defense: Noteboom Variation, Anti-Noteboom Variation?
After 1. d4 d5 2. c4 e6 3. Nc3 c6 4. Nf3 dxc4 5. Bg5, Stockfish 18 at depth 18 recommends 5… Be7 for Black, continuing 6. Bxe7 Qxe7 7. a4 Nf6 8. e4 b5 9. axb5 cxb5 10. Nxb5. The position is roughly equal (+0.05). The next best moves are 5… Qc7 (+0.44) and 5… Nf6 (+0.48).
Is the Semi-Slav Defense: Noteboom Variation, Anti-Noteboom Variation a good opening?
Stockfish rates the position at +0.05: the position is roughly equal. Evaluations this early in the game are small, so practical results depend far more on knowing the plans and typical structures than on the engine's number.
What is the ECO code of the Semi-Slav Defense: Noteboom Variation, Anti-Noteboom Variation?
D31. ECO codes classify chess openings from A00 to E99; D is the volume for closed and semi-closed games.

Opening names from the Lichess opening book (CC0). Pieces by Colin M.L. Burnett (GPLv2+).