ECO D50 · Queen's Gambit Declined

Queen's Gambit Declined: Been-Koomen Variation

1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 c5

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

5. cxd5+0.36

White is slightly better. Stockfish 18, depth 18.

Analyze this position

In the Queen's Gambit Declined: Been-Koomen Variation (D50), reached after 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 c5, Stockfish 18 recommends 5. cxd5 for White. White is slightly better (+0.36).

Top engine moves

  1. +0.365. cxd5 cxd4 6. Qxd4 Be7 7. e4 exd5 8. Bb5+ Nc6 9. Nxd5 Nxd5
  2. +0.185. Nf3 cxd4 6. Nxd4 dxc4 7. e3 Be7 8. Bxc4 Bd7 9. Bh4 Nc6
  3. −0.045. e3 cxd4 6. exd4 Be7 7. cxd5 Nxd5 8. Bxe7 Qxe7 9. Bd3 Nxc3

Frequently asked questions

What is the best move in the Queen's Gambit Declined: Been-Koomen Variation?
After 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 c5, Stockfish 18 at depth 18 recommends 5. cxd5 for White, continuing cxd4 6. Qxd4 Be7 7. e4 exd5 8. Bb5+ Nc6 9. Nxd5 Nxd5. White is slightly better (+0.36). The next best moves are 5. Nf3 (+0.18) and 5. e3 (−0.04).
Is the Queen's Gambit Declined: Been-Koomen Variation a good opening?
Stockfish rates the position at +0.36: white 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 Queen's Gambit Declined: Been-Koomen Variation?
D50. 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+).