Vienna Game Max Lange Defense Puzzle (Rated 1129): Refute a Fork — Escape
An unsupported knight that jumps deep into the enemy camp to fork king and rook looks terrifying, but it is often a bluff. Here Black launches a raider that hits White's king and rook at once, yet the fork backfires because the knight is defended by nothing. The refutation is a quiet king move that steps off the attacked square while chasing the intruder, denying it safe retreat squares. With its escape routes covered and no support in sight, the forking knight is trapped, and Black's apparent attack turns into a decisive material gain for White.