D40 is the opening Queen's Gambit Declined: Semi-Tarrasch Defense of the volume D · Closed games: 8 half-moves to the position in the diagram, 6 variations in the ECO table.
What the games say
2,082 games in the collections, from 1843 to 2022. Mean rating of the games with ratings: 2431.
White wins 30 %, draws 44 %, Black wins 26 %
Most games: Ivkov, Borislav (28), Alekhine, Alexander (23), Schlechter, Carl (21), Tal, Mihail (20), Janowski, Dawid Markelowicz (19)
All 6 variations
- Queen's Gambit Declined: Semi-Tarrasch Defense 1.d4 ♘f6 2.c4 e6 3.♘f3 d5 4.♘c3 c5
- Queen's Gambit Declined: Semi-Tarrasch Defense 1.d4 d5 2.c4 e6 3.♘c3 ♘f6 4.♘f3 c5 5.e3 ♘c6 6.a3 cxd4 7.exd4 ♗d6
- Queen's Gambit Declined: Semi-Tarrasch Defense, Levenfish Variation 1.d4 d5 2.c4 e6 3.♘c3 ♘f6 4.♘f3 c5 5.e3 ♘c6 6.♗d3 ♗d6 7.O-O O-O 8.♕e2 ♕e7 9.dxc5 ♗xc5 10.e4
- Queen's Gambit Declined: Semi-Tarrasch Defense, Pillsbury Variation 1.d4 d5 2.c4 e6 3.♘c3 ♘f6 4.♘f3 c5 5.♗g5
- Queen's Gambit Declined: Semi-Tarrasch Defense, Symmetrical Variation 1.d4 d5 2.c4 e6 3.♘c3 ♘f6 4.♘f3 c5 5.e3 ♘c6 6.♗d3 ♗d6 7.O-O O-O
- Queen's Gambit Declined: Semi-Tarrasch Defense, with e3 1.d4 d5 2.c4 c5 3.♘f3 ♘f6 4.♘c3 e6 5.e3 ♘c6 6.♗d3