Queen's Gambit Declined: Been-Koomen Variation
1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 c5
The Queen's Gambit Declined: Been-Koomen Variation is a chess opening classified as ECO D50, reached after 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 c5. It is a line of the Queen's Gambit Declined. White is to move. 3 named lines continue from this position.
In 12.6 million rated Lichess games (blitz and slower), this position was reached 349 times by this move order. White won 48%, 5% were drawn and Black won 47%. The most popular continuation is 5. e3 (37% of games).
Engine evaluation: +0.26 (Stockfish, depth 40; best line 5. cxd5 cxd4 6. Qxd4 Be7 7. e4 exd5)
- ECO
- D50
- Moves
- 8 plies
- FEN
rnbqkb1r/pp3ppp/4pn2/2pp2B1/2PP4/2N5/PP2PPPP/R2QKBNR w KQkq - 0 5- PGN
1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 c5
Analyse with Stockfish · Board image (SVG) · Open on Lichess
Results by rating
| Average rating | Games | White / draw / Black |
|---|---|---|
| 0-1499 | 99 | |
| 1500-1999 | 215 | |
| 2000+ | 35 | |
| All | 349 |
Most played moves
| Move | Games | White / draw / Black |
|---|---|---|
| 5. e3 | 129 (37%) | |
| 5. cxd5 Pseudo-Tarrasch Variation | 107 (31%) | |
| 5. Nf3 | 58 (17%) | |
| 5. dxc5 | 33 (9%) | |
| 5. Bxf6 | 11 (3%) | |
| 5. e4 | 7 (2%) | |
| 5. Qb3 | 1 (0%) | |
| 5. Qd2 | 1 (0%) |
Master games
13 over-the-board games are classified under this line (White 62%, draw 30%, Black 8%). The strongest:
- GM Aleksandr Shimanov (2578) – CM Rafail Antoniou (2036) 1-0 · Titled Tue 30th Jan Late · 2024-01-30
- IM Ashot Nadanian (2279) – CM Roman Jiganchine (2205) 1-0 · Titled Tue 10th Jan Early · 2023-01-10
- FM Ljubomir Biljanic (2347) – Goran S Simic (2109) 1-0 · Gligoric Cup 2013 · 2013-05-23
- IM Jaime Vaglio Munoz (2174) – CM Roman Jiganchine (2205) 1-0 · Titled Tue 31st Jan Early · 2023-01-31
- GM Murtas Kazhgaleyev (2481) – Ali Ahmedov (1797) 1-0 · Botvinnik Cup 2024 · 2024-09-07
Search all games of the Queen's Gambit Declined: Been-Koomen Variation and its sub-variations
Highest-rated Lichess games
- sallallami (2406) – StayinginDodge (2419) 1-0 · 2026-09-01 · 180 + 2s
- apotominuto (2415) – Fa11en_Ange1666 (2326) 1-0 · 2026-09-04 · 180 + 2s
- matityahu (2275) – Basman-student (2361) 1-0 · 2026-09-06 · 180 + 0s
Comes from
Queen's Gambit Declined: Modern Variation 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5
Continuations
- Queen's Gambit Declined: Pseudo-Tarrasch Variation D50 · 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 c5 5. cxd5
- Queen's Gambit Declined: Pseudo-Tarrasch Variation, Primitive Pillsbury Variation D50 · 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 c5 5. Nf3 cxd4 6. Qxd4
- Queen's Gambit Declined: Semi-Tarrasch Defense, Krause Variation D50 · 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 c5 5. Nf3 cxd4 6. Nxd4 e5 7. Ndb5 a6 8. Qa4
More Queen's Gambit Declined lines (all)
- Queen's Gambit Declined: Baltic Defense, Pseudo-Slav D02
- Queen's Gambit Declined: Austrian Attack, Salvio Countergambit D06
- Queen's Gambit Declined: Austrian Defense D06
- Queen's Gambit Declined: Austrian Defense, Gusev Countergambit D06
- Queen's Gambit Declined: Austrian Defense, Haberditz Variation D06
- Queen's Gambit Declined: Baltic Defense D06
- Queen's Gambit Declined: Baltic Defense, Argentinian Gambit D06
- Queen's Gambit Declined: Baltic Defense, Pseudo-Chigorin D06
- Queen's Gambit Declined: Baltic Defense, Queen Attack D06
- Queen's Gambit Declined: Baltic Defense, Queen Attack Deferred D06
- Queen's Gambit Declined: Marshall Defense D06
- Queen's Gambit Declined: Marshall Defense, Tan Gambit D06
Opening names and moves from the Lichess openings dataset; statistics from the Lichess open database, 2026-09 (CC0), sample of 12.6 million games, bots excluded; evaluations from Lichess cloud analysis (all CC0). Master games from The Week in Chess #920–#1664 by Mark Crowther, used with permission.