Queen's Gambit Declined: Orthodox Defense, Swiss, Carlsbad Variation

1.
1. d4
2. Nf6
2.
3. c4
4. e6
3.
5. Nf3
6. d5
4.
7. Nc3
8. Be7
5.
9. Bg5
10. O-O
6.
11. e3
12. Nbd7
7.
13. Rc1
14. a6
8.
15. cxd5

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The Queen's Gambit Declined: Orthodox Defense, Swiss, Carlsbad Variation is a chess opening classified under ECO code D63 (Closed & Semi-Closed games). It is a variation of the Queen's Gambit Declined family. Step through the moves on the board above, then play the line yourself or review it with the built-in engine.