Home › Openings › Semi-Slav Defense › Semi-Slav Defense: Anti-Noteboom, Stonewall Variation Semi-Slav Defense: Anti-Noteboom, Stonewall Variation, Portisch Gambit ECO D31 · 1. d4 d5 2. c4 e6 3. Nc3 c6 4. e3 f5 5. g4 Practice this opening · Play against the computer