Modern Defense Two Knights Variation Discovered Attack in Chess

In the Modern Defense Two Knights Variation, a key tactical idea is the discovered attack: one piece’s move (often a knight or pawn) reveals an attack by another piece along a line. The defining feature is that your repositioning creates a sudden threat on a more valuable target—typically a queen, rook, or pinned piece—without the “revealing” piece directly moving to the target square. In puzzles, this often appears when a defender’s piece blocks a line and then is forced to move or is displaced by a tactical tempo.