D02-D69

Queen's Gambit Declined

200 named lines in this family, ECO D02-D69. Under each line you get its moves and the sentences it adds that this page has not already printed; sixty lines to a page. A line's own page carries up to its first 4 per-move notes in full.

Normal DefenseD35

1. d4 d5 2. c4 e6 3. Nc3 Nf6

...e6 holds d5 at the cost of the c8-bishop's freedom: Black plays the most solid structure in chess and times ...c5 or ...dxc4 to free the game.

• 1. d4 Stakes a claim in the centre, controlling e5, and frees the bishop and queen.
• 1... d5 Stakes a claim in the centre, controlling e4, and frees the bishop and queen.
• 2. c4 Challenges the pawn on d5 - the central tension has to resolve. The pawn is genuinely on offer - this is the Queen's Gambit: development and initiative over material.
• 2... e6 Supports the centre, adding control of d5. Theory calls this the Queen's Gambit Declined.

Exchange Variation, after 1... Nf6, through 4. cxd5D35

1. d4 Nf6 2. c4 e6 3. Nc3 d5 4. cxd5

An early pawn trade leaves the c-file as White's avenue and the d-file as Black's - both sides get real winning chances down their own file. White has doubled pawns on the d-file.

• 1... Nf6 Develops the knight to f6, eyeing d5 and e4.
• 2. c4 Fights for d5 from the flank - contesting the centre without committing a centre pawn.

Harrwitz Attack, after 1... d5, through 4. Bf4D35

1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bf4

Exchange Variation, Positional Variation, through 5. Bg5D35

1. d4 Nf6 2. c4 e6 3. Nc3 d5 4. cxd5 exd5 5. Bg5

An early pawn trade leaves the c-file as White's avenue and the e-file as Black's - both sides get real winning chances down their own file.

Exchange Variation, Positional Variation, after 5... c6D35

1. d4 Nf6 2. c4 e6 3. Nc3 d5 4. cxd5 exd5 5. Bg5 c6

Exchange Variation, Sämisch VariationD35

1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Nbd7 5. cxd5 exd5 6. Bf4

Exchange Variation, after 1... Nf6, through 6... exd5D35

1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. e3 b6 5. Nc3 Bd6 6. cxd5 exd5

Exchange Variation, after 1... d5, through 7... c6D35

1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. e3 Be7 5. cxd5 exd5 6. Bd3 O-O 7. Nf3 c6

Exchange Variation, Carlsen VariationD35

1. d4 Nf6 2. c4 e6 3. Nc3 d5 4. cxd5 exd5 5. Bg5 Be7 6. e3 h6 7. Bh4 Bg4

Exchange Variation, Chameleon VariationD35

1. d4 Nf6 2. c4 e6 3. Nc3 d5 4. cxd5 exd5 5. Bg5 Be7 6. e3 O-O 7. Bd3 Nbd7 8. Qc2 Re8 9. Nge2 Nf8 10. O-O-O

Kings castle on opposite wings - expect pawn storms racing at both kings.

Exchange Variation, Reshevsky Variation, through 6. Qc2, line 1D36

1. d4 Nf6 2. c4 e6 3. Nc3 d5 4. cxd5 exd5 5. Bg5 c6 6. Qc2

Exchange Variation, Reshevsky Variation, after 6... Be7, through 8. Bd3, line 2D36

1. d4 Nf6 2. c4 e6 3. Nc3 d5 4. cxd5 exd5 5. Bg5 c6 6. Qc2 Be7 7. e3 Nbd7 8. Bd3

Exchange Variation, Reshevsky Variation, after 6... Be7, through 8. Bd3, line 3D36

1. d4 Nf6 2. c4 e6 3. Nc3 d5 4. cxd5 exd5 5. Bg5 c6 6. Qc2 Be7 7. e3 O-O 8. Bd3

Exchange Variation, Reshevsky Variation, after 6... Be7, through 9. Bh4, line 4D36

1. d4 Nf6 2. c4 e6 3. Nc3 d5 4. cxd5 exd5 5. Bg5 c6 6. Qc2 Be7 7. e3 O-O 8. Bd3 h6 9. Bh4

Three Knights Variation, after 1... Nf6D37

1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3

Barmen VariationD37

1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Nbd7

Three Knights, Vienna VariationD37

1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 dxc4

Black keeps the extra pawn; White plays for time, open lines, and initiative - the classic gambit trade.

Harrwitz Attack, after 1... Nf6, through 5. Bf4D37

1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Be7 5. Bf4

Vienna Variation, Quiet VariationD37

1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 dxc4 5. e3

Three Knights Variation, after 1... d5D37

1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 Be7 5. e3 O-O

Miles VariationD37

1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Be7 5. Bg5 O-O 6. Qc2

Harrwitz Attack, Fianchetto DefenseD37

1. d4 d5 2. c4 e6 3. Nc3 Be7 4. Nf3 Nf6 5. Bf4 O-O 6. e3 b6

Harrwitz Attack, Orthodox DefenseD37

1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 Be7 5. Bf4 O-O 6. e3 c6

Harrwitz Attack, Two Knights DefenseD37

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

Knight Defense, Alekhine GambitD37

1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Nbd7 5. Bg5 h6 6. Bh4 dxc4

Harrwitz Attack, Two Knights Defense, Blockade LineD37

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

Harrwitz Attack, Main LineD37

1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Be7 5. Bf4 O-O 6. e3 c5 7. dxc5 Bxc5

An early pawn trade leaves the c-file as Black's avenue and the d-file as White's - both sides get real winning chances down their own file.

Harrwitz Attack, after 1... Nf6, through 10. a3D37

1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Be7 5. Bf4 O-O 6. e3 c5 7. dxc5 Bxc5 8. Qc2 Nc6 9. Rd1 Qa5 10. a3

White's knight on c3 is pinned against the king.

Harrwitz Attack, after 1... Nf6, through 10. O-O-OD37

1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Be7 5. Bf4 O-O 6. e3 c5 7. dxc5 Bxc5 8. Qc2 Nc6 9. a3 Qa5 10. O-O-O

Ragozin DefenseD38

1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Bb4

Ragozin Defense, Alekhine VariationD38

1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Bb4 5. Qa4+

Westphalian VariationD38

1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Bb4 5. Bg5 Nbd7 6. e3 c5

Ragozin Defense, Vienna VariationD39

1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Bb4 5. Bg5 dxc4

Semi-Tarrasch Defense, after 1. d4, through 4... c5D40

1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 c5

Semi-Tarrasch Defense, Pillsbury Variation, after 1... d5D40

1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 c5 5. Bg5

Semi-Tarrasch Defense, with e3D40

1. d4 d5 2. c4 c5 3. Nf3 Nf6 4. Nc3 e6 5. e3 Nc6 6. Bd3

• 2... c5 Challenges the pawn on d4 - the central tension has to resolve. Theory calls this the Austrian Defense.

Semi-Tarrasch Defense, after 1. d4, through 7... Bd6D40

1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 c5 5. e3 Nc6 6. a3 cxd4 7. exd4 Bd6

An early pawn trade leaves the c-file as Black's avenue and the e-file as White's - both sides get real winning chances down their own file.

Semi-Tarrasch Defense, Symmetrical VariationD40

1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 c5 5. e3 Nc6 6. Bd3 Bd6 7. O-O O-O

Semi-Tarrasch Defense, Levenfish VariationD40

1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 c5 5. e3 Nc6 6. Bd3 Bd6 7. O-O O-O 8. Qe2 Qe7 9. dxc5 Bxc5 10. e4

White's pawn on f2 is pinned against the king.

Semi-Tarrasch Defense, after 1. d4, through 5. cxd5D41

1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 c5 5. cxd5

Semi-Tarrasch Defense, after 1. c4, through 5... e6D41

1. c4 c5 2. Nf3 Nf6 3. Nc3 Nc6 4. g3 d5 5. d4 e6

• 1. c4 Theory calls this the English Opening.
• 1... c5 Fights for d4 from the flank - contesting the centre without committing a centre pawn. Theory calls this the Symmetrical Variation.
• 2. Nf3 Develops the knight to f3, eyeing d4 and e5.

Semi-Tarrasch Defense, after 1. d4, through 6. g3D41

1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 c5 5. cxd5 Nxd5 6. g3

Semi-Tarrasch Defense, Exchange Variation, through 6. e4D41

1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 c5 5. cxd5 Nxd5 6. e4

Semi-Tarrasch Defense, Pillsbury Variation, after 1... Nf6D41

1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 c5 5. cxd5 Nxd5 6. e3

Semi-Tarrasch Defense, after 1. d4, through 7. Bg2D41

1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 c5 5. cxd5 Nxd5 6. g3 Nc6 7. Bg2

White's kingside bishop takes the long diagonal.

Semi-Tarrasch Defense, Exchange Variation, after 6... Nxc3D41

1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 c5 5. cxd5 Nxd5 6. e4 Nxc3 7. bxc3

An early pawn trade leaves the b-file as White's avenue and the d-file as Black's - both sides get real winning chances down their own file.

Semi-Tarrasch Defense, Endgame VariationD41

1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 c5 5. cxd5 cxd4 6. Qxd4 exd5 7. e4 dxe4 8. Qxd8+

The structure hands White the half-open e-file - rook pressure down it is a standing plan.

Semi-Tarrasch Defense, San Sebastian VariationD41

1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 c5 7. Nf3 cxd4 8. cxd4 Bb4+ 9. Bd2 Qa5

The c-file is fully open.

Semi-Tarrasch Defense, Kmoch VariationD41

1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 c5 5. cxd5 Nxd5 6. e4 Nxc3 7. bxc3 cxd4 8. cxd4 Bb4+ 9. Bd2 Bxd2+ 10. Qxd2 O-O 11. Bb5

Semi-Tarrasch Defense, Main LineD42

1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 c5 5. cxd5 Nxd5 6. e3 Nc6 7. Bd3

Modern VariationD50

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

Been-Koomen VariationD50

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

Pseudo-Tarrasch VariationD50

1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 c5 5. cxd5

Pseudo-Tarrasch Variation, Canal VariationD50

1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 c5 5. cxd5 Qb6

White is up material out of the opening - Black is banking on activity to show for it.

Pseudo-Tarrasch Variation, Primitive Pillsbury VariationD50

1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 c5 5. Nf3 cxd4 6. Qxd4

Semi-Tarrasch Defense, Krause VariationD50

1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 c5 5. Nf3 cxd4 6. Nxd4 e5 7. Ndb5 a6 8. Qa4

Modern Variation, Knight Defense, through 4... Nbd7D51

1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Nbd7

Modern Variation, Knight Defense, after 5. e3, through 5. e3D51

1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Nbd7 5. e3

Manhattan VariationD51

1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Nbd7 5. e3 Bb4

Modern Variation, Knight Defense, after 5. e3, through 5... c6D51

1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Nbd7 5. e3 c6

Lines 61–120 of 200 — page 2 of 4.

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