Nimzo-American Variation

The Nimzo-American Variation arises after 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 d5. Instead of developing a kingside piece or playing the usual ...e5, ...e6 or ...g6, Black strikes at the e4-pawn at once, hoping to dissolve White's last central pawn and free the position. The cost is time. Black has only one minor piece developed, and recaptures on d5 often bring the queen out early, where it can be harassed. The engine rates the line as a clear advantage for White, and it is seldom chosen at a serious level.

The most frequent reply is 5. Nxc6, which settles the knight tension before dealing with the center. Next comes 5. exd5, and after 5...Qxd5 6. Be3 White develops while gaining time against the exposed queen. A cleaner practical approach is 5. Bb5, which can lead to an endgame where White keeps a pleasant edge without much theoretical risk. 5. Nc3 is less common. In online play the results are closer than the engine assessment suggests, with White scoring only slightly better than Black.