Queen's Gambit Accepted: Classical Defense, Main Line (6. O-O a6)
1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 e6 5. Bxc4 c5 6. O-O a6
The Queen's Gambit Accepted: Classical Defense, Main Line is a chess opening classified as ECO D27, reached after 1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 e6 5. Bxc4 c5 6. O-O a6. It is a line of the Queen's Gambit Accepted. White is to move. 4 named lines continue from this position.
In 12.6 million rated Lichess games (blitz and slower), this position was reached 133 times by this move order. White won 50%, 6% were drawn and Black won 44%. The most popular continuation is 7. a4 (39% of games).
Engine evaluation: +0.22 (Stockfish, depth 50; best line 7. Be2 Nbd7 8. b3 b6 9. Ne5 Bb7)
- ECO
- D27
- Moves
- 12 plies
- FEN
rnbqkb1r/1p3ppp/p3pn2/2p5/2BP4/4PN2/PP3PPP/RNBQ1RK1 w kq - 0 7- PGN
1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 e6 5. Bxc4 c5 6. O-O a6
Analyse with Stockfish · Board image (SVG) · Open on Lichess
Results by rating
| Average rating | Games | White / draw / Black |
|---|---|---|
| 0-1499 | 2 | |
| 1500-1999 | 16 | |
| 2000+ | 115 | |
| All | 133 |
Most played moves
| Move | Games | White / draw / Black |
|---|---|---|
| 7. a4 Classical Defense, Rubinstein Variation (6… a6 7. a4) | 52 (39%) | |
| 7. dxc5 | 25 (19%) | |
| 7. Qe2 Classical Defense, Alekhine System (6… a6 7. Qe2) | 18 (14%) | |
| 7. b3 | 12 (9%) | |
| 7. Nc3 Classical Defense, Main Line (6… a6 7. Nc3) | 6 (5%) | |
| 7. Bb3 | 5 (4%) | |
| 7. a3 | 5 (4%) | |
| 7. e4 | 3 (2%) |
Master games
1,078 over-the-board games are classified under this line (White 43%, draw 38%, Black 19%). The strongest:
- GM Liren Ding (2799) – GM Levon Aronian (2782) 1-0 · chess.com Speed 2021 · 2021-12-06
- GM Liren Ding (2799) – GM Levon Aronian (2782) 1-0 · chess.com Speed 2021 · 2021-12-06
- GM Liren Ding (2799) – GM Levon Aronian (2782) 1-0 · chess.com Speed 2021 · 2021-12-06
- GM Liren Ding (2799) – GM Shakhriyar Mamedyarov (2765) 1/2-1/2 · chess.com Speed 2021 · 2021-11-09
- GM Alexander Grischuk (2777) – GM Anish Giri (2764) 1/2-1/2 · Chessable Masters Final 8 · 2020-06-26
Search all games of the Queen's Gambit Accepted: Classical Defense, Main Line and its sub-variations
Highest-rated Lichess games
- WOW_PEDRO (2561) – Surreptitiously421 (2610) 1-0 · 2026-09-03 · 180 + 0s
- FM Valery_Skatchkov2004 (2569) – Surreptitiously421 (2600) 1/2-1/2 · 2026-09-02 · 180 + 0s
- manuel-abarca (2551) – Surreptitiously421 (2575) 0-1 · 2026-09-01 · 180 + 0s
Comes from
Queen's Gambit Accepted: Classical Defense, Normal Line 1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 e6 5. Bxc4 c5 6. O-O
Continuations
- Queen's Gambit Accepted: Classical Defense, Alekhine System (6… a6 7. Qe2) D28 · 1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 e6 5. Bxc4 c5 6. O-O a6 7. Qe2
- Queen's Gambit Accepted: Classical Defense, Main Line (6… a6 7. Nc3) D27 · 1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 e6 5. Bxc4 c5 6. O-O a6 7. Nc3
- Queen's Gambit Accepted: Classical Defense, Rubinstein Variation (6… a6 7. a4) D27 · 1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 e6 5. Bxc4 c5 6. O-O a6 7. a4
- Queen's Gambit Accepted: Furman Variation D27 · 1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 e6 5. Bxc4 c5 6. O-O a6 7. dxc5 Bxc5
More Queen's Gambit Accepted lines (all)
- Queen's Gambit Accepted (2. c4 dxc4) D20
- Queen's Gambit Accepted: Accelerated Mannheim Variation D20
- Queen's Gambit Accepted: Central Variation, Alekhine System D20
- Queen's Gambit Accepted: Central Variation, Greco Variation D20
- Queen's Gambit Accepted: Central Variation, McDonnell Defense D20
- Queen's Gambit Accepted: Central Variation, McDonnell Defense, Somov Gambit D20
- Queen's Gambit Accepted: Central Variation, Modern Defense D20
- Queen's Gambit Accepted: Central Variation, Rubinstein Defense D20
- Queen's Gambit Accepted: Central Variation, Rubinstein Defense, Yefimov Gambit D20
- Queen's Gambit Accepted: Linares Variation D20
- Queen's Gambit Accepted: Old Variation D20
- Queen's Gambit Accepted: Old Variation, Billinger Gambit D20
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.