ECO D31 · Semi-Slav Defense

Semi-Slav Defense: Gunderam Gambit

1. d4 d5 2. c4 e6 3. Nc3 c6 4. e4 dxe4 5. f3

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

5… Bb4−0.63

Black is slightly better. Stockfish 18, depth 18.

Analyze this position

In the Semi-Slav Defense: Gunderam Gambit (D31), reached after 1. d4 d5 2. c4 e6 3. Nc3 c6 4. e4 dxe4 5. f3, Stockfish 18 recommends 5… Bb4 for Black. Black is slightly better (−0.63).

Top engine moves

  1. −0.635… Bb4 6. Bf4 c5 7. dxc5 Nd7 8. Qc2 Nxc5 9. a3 Qa5 10. Bd2
  2. −0.415… Nf6 6. Bf4 Bb4 7. Qb3 Bd6 8. Bg5 e5 9. O-O-O exd4 10. Nxe4
  3. −0.365… e5 6. Be3 exd4 7. Qxd4 Qxd4 8. Bxd4 exf3 9. Nxf3 Be6 10. O-O-O

Frequently asked questions

What is the best move in the Semi-Slav Defense: Gunderam Gambit?
After 1. d4 d5 2. c4 e6 3. Nc3 c6 4. e4 dxe4 5. f3, Stockfish 18 at depth 18 recommends 5… Bb4 for Black, continuing 6. Bf4 c5 7. dxc5 Nd7 8. Qc2 Nxc5 9. a3 Qa5 10. Bd2. Black is slightly better (−0.63). The next best moves are 5… Nf6 (−0.41) and 5… e5 (−0.36).
Is the Semi-Slav Defense: Gunderam Gambit a good opening?
Stockfish rates the position at −0.63: black is slightly better. 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: Gunderam Gambit?
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+).