Pirc Defense: Austrian Attack, Unzicker Attack

A sharp and aggressive chess opening that leads to rich middlegame positions with chances for both sides.

The opening in question is a highly aggressive one that aims to put pressure on Black's kingside from the very beginning. White starts with a pawn center and then advances the e-pawn, attacking Black's knight on f6. This forces Black to make a decision on how to deal with the pawn break.

Black has several options, including capturing the pawn with the knight, moving the knight to d7, or playing dxe5. Each of these options leads to different pawn structures and middlegame plans. The opening is characterized by the early e5 push, which can lead to sharp tactical battles and imbalances in the position.

White's main idea is to open up the center and create attacking chances against Black's king, while Black aims to counterattack and exploit any weaknesses in White's pawn structure. Properly handling the resulting middlegame positions requires a good understanding of pawn structures, piece coordination, and tactical opportunities.

This opening is named after the German Grandmaster who employed it with great success during his career. It is a popular choice among aggressive players who enjoy complex and double-edged positions.