Chess Openings Lab
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Queen's Gambit Declined: Three Knights, Vienna Variation

The Three Knights Vienna Variation arises when Black meets 4.Nc3 with 4...dxc4, giving up the d5 point to grab the c4 pawn. White wants a big center with e4 and quick development, while Black hits back with ...Bb4 and ...c5 against d4.

Moves
1.d4 Nf6 2.c4 e6 3.Nf3 d5 4.Nc3 dxc4
ECO
D37
Engine
+0.30 · a slight edge for White (Stockfish 17.1, depth 20)
Played
509 games in our lichess sample
White scores
52.2%

Key ideas for both sides

White

  • Push 5.e4 at once: the pawn takes the center and opens the f1-bishop's road to c4 to win the pawn back.
  • Pin the f6 knight with Bg5 so Black's counterattack on e4 loses force, then recapture on c4 with the bishop.
  • After ...cxd4 recapture with Nxd4, keep pieces active and use the open lines rather than defending a weak pawn.
  • 5.Qa4+ is a calm alternative: after ...c6 Qxc4 regains the pawn, though ...b5 gains Black queenside time.

Black

  • Answer e4 with ...Bb4, pinning the c3 knight so the e4 pawn is harder to hold.
  • Strike with ...c5 to trade the c-pawn for d4 and open the position before White finishes castling.
  • Bring the queen to a5 after ...cxd4, adding pressure to the pinned c3 knight and the g5 bishop.
  • Against quieter play like e3, use ...a6 and ...b5 to gain space and develop the bishop to b7.

Plans and pawn structure

After 5.e4 Bb4 the game opens fast. White regains c4 with the bishop and aims for central space and piece activity, often with the king's safety as the main worry. Black's ...c5 and ...cxd4 clear the c-file and leave White a lone central e-pawn, so Black targets e4 and the pinned c3 knight. The structure resembles an Open Sicilian: White has the e-pawn, Black the d- and e-file majority. Whoever coordinates the pieces faster usually takes over.

Where the engine's main line heads: Open Sicilian: White traded the d-pawn for Black's c-pawn. An Open Sicilian: White traded the d-pawn for Black's c-pawn. White has a lead in development and the d-file, Black has the half-open c-file and two central pawns.

What the engine plays from here

Stockfish 17.1 at depth 20 rates the position +0.30: a slight edge for White. Its three top choices for White:

  1. +0.30 5.e4 Bb4 6.Bg5 c5 7.Bxc4 cxd4
  2. +0.13 5.Qa4+ c6 6.Qxc4 b5 7.Qd3 Nbd7
  3. +0.11 5.e3 a6 6.Bxc4 c5 7.O-O b5

Pawns, from White's side.

How it scores on lichess

509 rated lichess games reached this position; White scored 52.2%.

under 120066.7%
1200–159959.8%
1600–199946.9%
2000 and up48.3%

Light: White wins. Grey: draws. Dark: Black wins. About the sample.

Where it goes next

  • Vienna Variation, Quiet Variation5.e3 · rare

How to play against it

As White, do not try to hold the c4 pawn with b3 or similar. Play 5.e4, develop, and take c4 back with the bishop. Expect ...Bb4 and ...c5, so keep the c3 knight protected and do not let Black's queen land on a5 with several pins at once.

Questions

What are the moves of the Queen's Gambit Declined: Three Knights, Vienna Variation?

The Queen's Gambit Declined: Three Knights, Vienna Variation starts 1.d4 Nf6 2.c4 e6 3.Nf3 d5 4.Nc3 dxc4. Its ECO code is D37.

Is the Queen's Gambit Declined: Three Knights, Vienna Variation good for Black?

Stockfish 17.1 rates the position +0.30 at depth 20, which is a slight edge for White. In 509 lichess games from our sample, White scored 52.2%. A sharp and open choice for Black players who know their tactics, while White needs to handle pins and a fast ...c5 strike.

What is the main idea of the Queen's Gambit Declined: Three Knights, Vienna Variation?

Black gives up the d5 strongpoint to take on c4, then counterattacks with ...Bb4 and ...c5. White gets the center with e4 and plans to recover the pawn on c4 with the bishop.

What should White play next?

The engine's first choice is e4, with Qa4+ and e3 close behind. 5.e4 grabs the center at once and frees the f1-bishop to recapture on c4.

Updated October 2026. Sources and method.