Bishops Opening Boden Kieseritzky Gambit Discovered Attack in Chess

In the bishops opening Boden–Kieseritzky Gambit, the “discovered attack” motif happens when a piece move opens a line so a bishop (or another long-range piece) suddenly attacks a target behind it. The defining feature is that a tactical tempo is gained by unmasking: your move both creates the discovered line and forces the opponent to respond immediately. In many lines, the bishop’s diagonal becomes active right after a sacrifice or a forcing move, turning the opponent’s king or key piece into the new focus.