1.Nbd5! ! Try : 1.Qg3+? Bg7 2.Nxc6 Nxc6 3.h6 Qd1+ 4.Ka2 Qa4+ 5.Kb1 Qd1+=   1...Rxc4 1...Ne6 2.Bb4 Nc5 3.Ne2 Bg7 4.Nd4+- 1...Nf5 2.Bb4 Qd7 3.h6+-   2.Bb4! Rxb4 2...Qe5 3.Ne7+ Kg7 (3...Kf8 4.Neg6++-) 4.h6+! Kxh6 5.Qh4+ Kg7 6.Nh5+-]   3.Qg3+ Bg7 3...Kf8 4.Ng6+ fxg6 5.Qxd6+-   4.Ng6! Qxg3 4...hxg6 5.Qxd6 Rb7 6.Qc5 (6.Nxf6+? Bxf6 7.Qxf6 Rd7 8.hxg6 fxg6 9.Qxg6+ Kf8=) 6...Kh7 (6...f5 7.Qc8++-) 7.Qxd4 f5 8.Nf6+ Bxf6 9.Qxf6+- 4...Qd8 5.Nde7+ Qxe7 6.Nxe7+-    5.Nde7# mate