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Queen’s Gambit

There is also the Slav Defense 1 d4 d5 2 c4 c6. It blocks square c6 for Nb8, but leaves the diagonal of Bc8 open.
The trend now is 1 d4 d5 2 c4 e6 3 Nc3 Nf6 4 cxd5 exd5 where white trades a wing pawn c4 for a central pawn e6.
Example:
https://lichess.org/@/TheDiamondTiger/blog/magnus-plays-near-perfect-chess-as-alireza-loses-his-first-game/58p4cSx0
Tarrasch was of the opinion black should play 1 d4 d5 2 c4 e6 3 Nc3 c5, which leads to an isolated queen's pawn.
Tarrasch was of the opinion than black should not accept the queen's gambit. His reasoning was that after 1 d4 d5 2 Nf3 Nf6 3 e3 e6 4 c4 no master would capture 4...dxc4 out of the center developing 5 Bxc4 with tempo.

There is also the Slav Defense 1 d4 d5 2 c4 c6. It blocks square c6 for Nb8, but leaves the diagonal of Bc8 open. The trend now is 1 d4 d5 2 c4 e6 3 Nc3 Nf6 4 cxd5 exd5 where white trades a wing pawn c4 for a central pawn e6. Example: https://lichess.org/@/TheDiamondTiger/blog/magnus-plays-near-perfect-chess-as-alireza-loses-his-first-game/58p4cSx0 Tarrasch was of the opinion black should play 1 d4 d5 2 c4 e6 3 Nc3 c5, which leads to an isolated queen's pawn. Tarrasch was of the opinion than black should not accept the queen's gambit. His reasoning was that after 1 d4 d5 2 Nf3 Nf6 3 e3 e6 4 c4 no master would capture 4...dxc4 out of the center developing 5 Bxc4 with tempo.

Thanks for your throughts

Thanks for your throughts