ECO D37 · Queen's Gambit Declined

Queen's Gambit Declined: Harrwitz Attack, Two Knights Defense, Blockade Line

1. d4 Nf6 2. c4 e6 3. Nc3 d5 4. Nf3 Be7 5. Bf4 O-O 6. e3 Nbd7 7. c5

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

7… Nh5+0.28

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

Analyze this position

In the Queen's Gambit Declined: Harrwitz Attack, Two Knights Defense, Blockade Line (D37), reached after 1. d4 Nf6 2. c4 e6 3. Nc3 d5 4. Nf3 Be7 5. Bf4 O-O 6. e3 Nbd7 7. c5, Stockfish 18 recommends 7… Nh5 for Black. The position is roughly equal (+0.28).

Top engine moves

  1. +0.287… Nh5 8. Bd3 Nxf4 9. exf4 c6 10. Qc2 b6 11. cxb6 c5 12. bxa7
  2. +0.297… c6 8. Bd3 Nh5 9. Qc2 b6 10. cxb6 Nxf4 11. exf4 c5 12. bxa7
  3. +0.327… a5 8. Bd3 c6 9. a3 Nh5 10. Qc2 Nxf4 11. Bxh7+ Kh8 12. exf4

Frequently asked questions

What is the best move in the Queen's Gambit Declined: Harrwitz Attack, Two Knights Defense, Blockade Line?
After 1. d4 Nf6 2. c4 e6 3. Nc3 d5 4. Nf3 Be7 5. Bf4 O-O 6. e3 Nbd7 7. c5, Stockfish 18 at depth 18 recommends 7… Nh5 for Black, continuing 8. Bd3 Nxf4 9. exf4 c6 10. Qc2 b6 11. cxb6 c5 12. bxa7. The position is roughly equal (+0.28). The next best moves are 7… c6 (+0.29) and 7… a5 (+0.32).
Is the Queen's Gambit Declined: Harrwitz Attack, Two Knights Defense, Blockade Line a good opening?
Stockfish rates the position at +0.28: 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 Queen's Gambit Declined: Harrwitz Attack, Two Knights Defense, Blockade Line?
D37. 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+).