Black declines the gambit and supports the d5 pawn, leading to solid but slightly passive positions. A favorite of defensive players and world champions alike.
Move Sequence
1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 Be7 5. Bf4 O-O 6. e3 c5 7. dxc5 Bxc5
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White aims to exploit the isolated d-pawn Black will often have after exchanges on d5, placing pieces on ideal blockading squares such as d4 with a knight and using the c-file after opening it. White's bishop on f4 targets the weak c7 square and supports a queenside-oriented positional squeeze.
Black seeks active piece play to compensate for the potential IQP, using the dynamic bishop on c5 and quick development to pressure e3 and generate kingside or central activity. If forced into an IQP position after ...dxc4 or cxd5 exd5, Black fights for the d4 outpost and uses the open e-file for rook activity.
White: cxd5 (forcing IQP or structural concessions), e4 (central expansion after consolidation); Black: ...d4 (pawn advance to seize space), ...e5 (challenging White's center and activating the c5 bishop)
The middlegame is semi-open and positional, often revolving around the isolated d5-pawn if Black recaptures with a pawn after cxd5. Play is strategic with White targeting the weak pawn on d5 and Black compensating with active piece coordination and attacking chances on the kingside or along open files.
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