A Complete Black Repertoire against 1.d4

Windows 10 or higher
Minimum: Dual Core, 2 GB RAM, DirectX11, graphics card with 256 MB RAM, (DVD-ROM drive), Windows Media Player 9, ChessBase 14/Fritz 16 or included Reader and internet access for program activation. Recommended: PC Intel i5 (Quadcore), 4 GB RAM, Windows 10, DirectX11, graphics card with 512 MB RAM or more, 100% DirectX10-compatible sound card, Windows Media Player 11, (DVD-ROM drive) and internet access for program activation.

MacOSX
only available as download! Minimum: MacOS "Yosemite" 10.10

Queen's Gambit Accepted

A third and very different possibility is 2...dxc4, the Queen’s Gambit Accepted. Black immediately resolves the central tension set up with 2.c4. But in doing so by capturing away from the centre, he does concede to White a 2:1 pawn majority in the middle of the board (d- and e-pawns against e-pawn). At the same time, there is no sensible way for Black to defend the c4-pawn, so that in the strictest sense of the term the Queen’s Gambit is not a real gambit. The principled way for White is now 3.e4, meaning that he immediately forms the “ideal” centre – i. e. pawns on d4 and e4. Black will attack this centre with his pawns and/or pieces, aiming to force the exchange or advance of if possible one of these white pawns. He has the choice between 3...c5, 3...e5, 3...Nc6 and 3...Nf6, after which early complications can develop.