Chess puzzle (Advantage)
Opening: Zukertort_Opening, Zukertort_Opening_Tennison_Gambit
Moves: 1. Nf3 d5 2. e4 dxe4 3. Ng5 Nf6 4. d3 exd3 5. Bxd3 Nc6 6. a3 h6 7. Nf3 b6 8. b4
Nd4 *
Position (FEN): r1bqkb1r/p1p1ppp1/1p3n1p/8/1P1n4/P2B1N2/2P2PPP/RNBQK2R w KQkq - 1 9
White to move.
Themes:  Opening  
Puzzle rating: 1430
Best move: Nxd4