Two Knights Defense, Kloss Gambit

The Kloss Gambit replaces the usual 5...Na5 with 5...Nb4, a rarely played try. The knight attacks the d5-pawn a second time, and only the bishop defends it. Black remains a pawn down without clear compensation. The most common reply, 6. d6, removes the pawn from the knight's reach and renews pressure on f7. 6. Bb5+ and 6. a3 are also played, and Black scores better against both. The engine gives White a slight edge.