Janzen-Korchnoi Gambit

The Janzen-Korchnoi Gambit follows 2. h3 Nf6 of the Korchnoi Attack with 3. g4, offering a pawn to open the h-file. Acceptance with 3...fxg4 is the most common reply, and White scores heavily there, helped by the trap 4. hxg4 Nxg4 5. Qd3 Nf6?? 6. Rxh7 Rxh7?? 7. Qg6#. Declining with 3...d5 or 3...e6 works out well for Black, and the engine rates the position as roughly balanced.