Exchange Variation (Carlsbad structure) is variation 3 of 6 in the Queen's Gambit Declined course, a intermediate opening course for Black (ECO D36). It runs 26 moves and begins 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. cxd5 exd5 …. White exchanges on d5 early to fix the structure and plans the minority attack with b4-b5. Black builds a solid set-up with ...c6, ...Nbd7-f8 and uses ...Ne4 to trade pieces and gain kingside play. In the lesson every move is explained on a board and then drilled; it is free.
Move by move
1. d4 – White takes the centre.
1... d5 – Black stakes out d5.
2. c4 – The Queen's Gambit.
2... e6 – Supports d5 and opens the f8 bishop.
3. Nc3 – Adds pressure to d5.
3... Nf6 – Develops and defends d5.
4. cxd5 – The Exchange Variation: White fixes the pawn structure now.
4... exd5 – Recapturing with the pawn keeps a strong point on d5 and opens the c8 bishop's diagonal.
5. Bg5 – Pins the f6 knight and prepares e3 with the bishop already outside the chain.
5... Be7 – Unpins and prepares castling.
6. e3 – Solid support for d4; the f1 bishop will go to d3.
6... c6 – Supports d5 for good, freeing the queen and knights from that duty.
7. Bd3 – Develops the bishop to its best diagonal aiming at h7.
7... Nbd7 – Heads for f8 and g6 or e6, a typical regrouping in this structure.
8. Qc2 – Stops ...Bf5, which would trade Black's problem bishop, and eyes h7.
8... O-O – Black castles; the king is safe behind f7, g7, h7.
The lesson goes on for 10 more moves, each with its explanation.
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