Caissa Codex
Tree path 2 levels Queen's Gambit Declined: Three Knights Variation › Queen's Gambit Declined: Semi-Tarrasch Defense
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  2. Queen's Gambit Declined: Three Knights Variation D37
  3. Queen's Gambit Declined: Semi-Tarrasch Defense D40 you are here
D40

Queen's Gambit Declined: Semi-Tarrasch Defense

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Overview

Chess diagram: Queen's Gambit Declined: Semi-Tarrasch Defense after 4…c5
After 4…c5

Queen's Gambit Declined: Semi-Tarrasch Defense (ECO D40) is a declined gambit in Queen's Gambit Declined: Three Knights Variation, reached after 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 c5 — 4 moves.

In 2,194,020 rated Lichess games between players rated 1600 to 2500, White won 49.3%, Black 44.3% and 6.4% were drawn. White's most played move here is 5. cxd5, in 31% of those games.

It continues into one named variation. In all, 6 named lines continue from it.

ECO code
D40
Group
Closed & Semi-Closed Games (D)
Length
4 moves
Parent
Queen's Gambit Declined: Three Knights Variation
Direct variations
1
Total in subtree
6

Generated from the data: the Lichess opening list and opening explorer. Know this line well? Write a description — submissions are reviewed before publishing.

Statistics from Lichess

2,194,020 games · White 49.3% / Draw 6.4% / Black 44.3%

MovesGamesW / D / B
cxd5674,533
Bg5653,699
e3543,871
dxc5149,181
Bf493,289
g347,365
a38,528
h35,327

Source: Lichess Opening Explorer · cached 2026-09-26 01:56:09

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Variations (1)

Related variations at the same level

Sister lines that share the same parent Queen's Gambit Declined: Three Knights Variation:

Transpositions

From here, a move transposes into another named line:

Show all 6 sub-variations (full subtree)

https://chesscodex.org/openings/queens-gambit-declined-semi-tarrasch-defense