Nimzowitsch Defense Discovered Check in Chess

The nimzowitsch defense discovered check is a tactical motif where a piece in the Nimzowitsch Defense (often via the c-file or a central diagonal) moves away or is unblocked, revealing a line that gives check to the enemy king. A defining feature is that the checking piece’s line becomes active only after the “discovery” move, so the opponent is hit by a threat that was hidden one move earlier. In practice, it often appears around central tension and piece coordination typical of the Nimzowitsch Defense.