Queen's Gambit Declined: Semi-Tarrasch Defense, San Sebastian Variation position after 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. White: pawn on d4, pawn on e4, knight on f3, pawn on a2, bishop on d2, pawn on f2, pawn on g2, pawn on h2, rook on a1, queen on d1, king on e1, bishop on f1, rook on h1. Black: rook on a8, knight on b8, bishop on c8, king on e8, rook on h8, pawn on a7, pawn on b7, pawn on f7, pawn on g7, pawn on h7, pawn on e6, queen on a5, bishop on b4.
Queen's Gambit Declined: Semi-Tarrasch Defense, San Sebastian Variation is a chess opening that arises after 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. It is classified D41 in the ECO system, and the position after these moves has white to move. The Queen's Gambit Declined meets 1.d4 d5 2.c4 by supporting the d5 pawn with e6 rather than capturing. It is one of the most respected defences in chess, chosen in world championship matches for over a century because it gives Black a rock-solid centre that is very hard to break down.
Strategic character
Black shuts in the light-squared bishop with e6 in exchange for a stable centre. The recurring strategic themes are freeing the position with c5 or e5, and the minority attack, where White advances the queenside pawns to create a weakness in Black's structure.
Who should play it
Players who want a dependable answer to 1.d4 and are comfortable in classical positions where small structural advantages decide the game.
This line is a variation within the Queen's Gambit Declined family. The strategic ideas above describe the family as a whole; this particular line reaches them by the move order 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.
Frequently asked questions
What is the Queen's Gambit Declined: Semi-Tarrasch Defense, San Sebastian Variation?
The Queen's Gambit Declined: Semi-Tarrasch Defense, San Sebastian Variation is a chess opening that arises after 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. It is classified D41 in the ECO system. The Queen's Gambit Declined meets 1.d4 d5 2.c4 by supporting the d5 pawn with e6 rather than capturing. It is one of the most respected defences in chess, chosen in world championship matches for over a century because it gives Black a rock-solid centre that is very hard to break down.
What are the moves of the Queen's Gambit Declined: Semi-Tarrasch Defense, San Sebastian Variation?
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. After these moves it is white to move.
Is the Queen's Gambit Declined: Semi-Tarrasch Defense, San Sebastian Variation good for beginners?
Players who want a dependable answer to 1.d4 and are comfortable in classical positions where small structural advantages decide the game.