Nimzowitsch Defense: Scandinavian Variation, Bogoljubov Variation, Vehre Variation

A dynamic and unorthodox chess opening that leads to sharp positions and rich middlegame play.

The opening is characterized by an early deviation from the main lines of the Scandinavian Defense, with Black opting for a quick development of the knights to challenge White's central pawn structure. This variation is named after the famous Russian Grandmaster Efim Bogoljubov and the Finnish chess player Eero Vehre, who both contributed to its development and popularization.

In this opening, Black aims to create counterplay and imbalance in the position, often leading to double-edged and complex middlegames. The knights' placement on f6 and c6 can potentially exert pressure on White's central pawns, while also preparing for pawn breaks with ...e5 or ...d5. White, on the other hand, seeks to maintain a strong pawn center and exploit any weaknesses in Black's position.

The opening can lead to various pawn structures, depending on how both players choose to proceed. It is essential for Black to be well-prepared and familiar with the arising middlegame plans, as White can often obtain a space advantage and better piece coordination.

This variation is not as popular as the main lines of the Scandinavian Defense, but it has been employed by strong players at the highest level, including former World Champion Anatoly Karpov. The unorthodox nature of the opening can catch opponents off-guard and lead to exciting battles on the chessboard.