The Queen's Gambit Declined: 1.d4 d5 2.c4... b6 begins with 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7 5.e3 0-0 6.Nf3 h6 7.Bh4 b6 (ECO D58). Across rating levels it shows up in 357,690 recorded games — enough data to map exactly where it succeeds and where it stalls.
History and Notable Players
It arises from the Queen's Gambit Declined: 1.d4 d5 2.c4... 7.Bh4. Among the most prolific White practitioners are Predrag Nikolic (32 games), Florin Gheorghiu (26 games), Lajos Portisch (25 games). Black-side regulars include Alexander G Beliavsky (70 games), Rafael A Vaganian (62 games), Efim Geller (60 games).
Performance Across Rating Levels
How well the Queen's Gambit Declined: 1.d4 d5 2.c4... b6 works depends on what level you're playing at. Among 1200-rated players, it appears in 0.00% of games — 3,854 of them on record — with White winning 45.5% and Black 51.3%. By 1800, popularity is 0.01% and White's score is 45.1% to Black's 48.3%. At the top end (2500+ Elo), popularity is 0.06% with 13.4% draws — a clear sign of how much theory rules the line at master level. Positions also become less sharp as level rises (sharpness 0.97 → 0.87).
Move Diversity and Theory Depth
What players actually play after the opening moves depends heavily on rating. At 1200 Elo, the top reply is Bd3, played 39.9% of the time. There are 3 other moves seeing meaningful share, and 80.8% of games stick to established theory. Entropy: 2.46. By 2500, cxd5 dominates at 31.6% of replies; only 7 viable alternatives remain and 62.4% of moves are theory. Entropy drops to 2.77. Move diversity stays high even at master level, suggesting the opening doesn't force one specific response.
Main Lines and Variations
The main branches off 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7 5.e3 0-0 6.Nf3 h6 7.Bh4 b6 include:
Each branch leads to a different middlegame character — the resulting pawn structure decides what kind of game you get.
Common Mistakes
- Neglecting development — It can feel productive to make extra pawn moves early, but falling behind in piece development is what loses most amateur games — especially in open positions where active pieces find squares fast.
- Overextending the attack — Gambits look like permission to throw everything forward. They aren't — every attacking move should improve a piece. Random checks and threats burn the initiative once they fail to coordinate.
Practice on Chessiverse
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