Board Position

One of the many alternative defences to the Queen's Gambit. Instead of the Slav Defence (2..P-QB3), Black declines by 2..P-K3, 3..P-QB3 (move 3b, left), threatening to take and keep White's QBP soon after. Also known as the Half-Slav, it is in fact a "Slav-plus-K3" defence rather than a semi-defence.
Main play leads to the Meran Variation (Black's 6..QPxQBP, right) where Black begins to group rapidly on the queen's wing.

Board Position
Other early variations include the Marshall Gambit, the Romi Variation and the Anti-Meran Gambit.
Begin or Clear or Groups or see move: 1 d4 d5 2 c4 e6 3 Nc3 c6 then 4 Nf3 Nf6 to:

(Main:) 5 e3 Nbd7 6 Bd3 dxc4 7 Bxc4 b5 8 Bd3 a6 9 e4 c5 10 e5 cxd4 11 Nxb5 Nxe5 12Nxe5 axb5
(Anti-Meran:) 5 Bg5 dxc4 6 e4 b5 7 e5 h6 8 Bh4 g5 9 Nxg5 hxg5 10 Bxg5 Nbd2 11 exf6 Bb7