Slav Defense: Exchange Variation, Boor Attack

The Slav Defense: Exchange Variation, Boor Attack is a chess opening classified under ECO code D10 in the Closed & Semi-Closed Games family, arising from 1.d4 d5, including the Queen's Gambit, Slav Defense, and related systems. It is reached after 5 moves: 1. d4 d5 2. c4 c6 3. cxd5 cxd5 4. Nc3 Nf6 5. f3. The resulting position leaves black to move.